US Core Implementation Guide
8.0.1 - STU 8

US Core Implementation Guide, published by HL7 International / Cross-Group Projects. This guide is not an authorized publication; it is the continuous build for version 8.0.1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/US-Core/ and changes regularly. See the Directory of published versions

## Terminology

Page standards status: Trial-use

This page lists all the ValueSets, CodeSystems, and ConceptMaps defined as part of the US Core Implementation Guide. For more information on using codes in US Core, see the FHIR Terminology section in the FHIR specification and the Coded Elements section in this guide.

### Value Sets

Most value sets used in this guide are defined in the base FHIR specification, HL7 Terminology (THO), or Value Set Authority Center (VSAC)]. However, US Core also defines several value sets and they are listed below.

Value sets in US Core and C-CDA may retain inactive codes. These codes may be useful for historical queries but are not recommended for new data. Implementers should note that some code systems exclude inactive codes from current expansions; if needed, these codes may be accessible through prior expansions via terminology services. HL7 recommends validators allow non-active codes with note on their status.

- US Core Narrative Status
- US Core Clinical Note Type
- US Core Clinical Result Observation Category
- US Core Condition Codes
- US Core Condition Codes Current
- US Core Diagnostic Report Category Codes
- US Core DocumentReference Category
- US Core DocumentReference Type
- US Core Goal Codes
- US Core Laboratory Test Codes
- US Core Non Laboratory Codes
- US Core Status for Smoking Status Observation
- US Core Problem or Health Concern
- US Core Procedure Codes
- US Core Provenance Participant Type Codes
- US Core Screening Assessment Condition Category
- US Core Screening Assessment Observation Category
- US Core Screening Assessment Observation Maximum Category
- US Core ServiceRequest Category Codes
- US Core Simple Observation Category
- US Core Specimen Condition

#### Value Sets Used in US Core

The following table lists all the Value sets used in US Core and where they can be found. This information is also available as a csv or excel file.

Value Set Sources:

- VSAC
- FHIR
- US CORE
- PHINVADS
- THO

Row # | Value Set | Profiles Where Used | Source
--- | --- | --- | ---
1 |  | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | FHIR
2 | ActEncounterCode | StructureDefinition/us-core-encounter | THO
3 | ActPharmacySupplyType | StructureDefinition/us-core-medicationdispense | THO
4 | ActPriority | StructureDefinition/us-core-encounter | THO
5 | ActSubstanceAdminSubstitutionCode | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | THO
6 | AddressType | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-location StructureDefinition/us-core-organization | FHIR
7 | AddressUse | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-location StructureDefinition/us-core-organization | FHIR
8 | AdministrativeGender | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-relatedperson | FHIR
9 | Admit source | StructureDefinition/us-core-encounter | FHIR
10 | Advance Healthcare Directive Categories LOINC | StructureDefinition/us-core-adi-documentreference | VSAC
11 | Advance Healthcare Directive Document Types Grouper | StructureDefinition/us-core-adi-documentreference | VSAC
12 | AllergyIntolerance Clinical Status Codes | StructureDefinition/us-core-allergyintolerance | FHIR
13 | AllergyIntolerance Verification Status Codes | StructureDefinition/us-core-allergyintolerance | FHIR
14 | AllergyIntoleranceCategory | StructureDefinition/us-core-allergyintolerance | FHIR
15 | AllergyIntoleranceCriticality | StructureDefinition/us-core-allergyintolerance | FHIR
16 | AllergyIntoleranceSeverity | StructureDefinition/us-core-allergyintolerance | FHIR
17 | AllergyIntoleranceType | StructureDefinition/us-core-allergyintolerance | FHIR
18 | Answer Set with Yes No and Unknowns | StructureDefinition/us-core-interpreter-needed StructureDefinition/us-core-observation-adi-documentation | VSAC
19 | Birth Sex | StructureDefinition/us-core-birthsex | VSAC
20 | Body Length Units | StructureDefinition/us-core-head-circumference StructureDefinition/us-core-body-height | FHIR
21 | Body Temperature Units | StructureDefinition/us-core-body-temperature | FHIR
22 | Body Weight Units | StructureDefinition/us-core-body-weight | FHIR
23 | CMS Place of Service Codes (POS) | StructureDefinition/us-core-location | THO
24 | CVX Vaccines Administered Vaccine Set | StructureDefinition/us-core-immunization | VSAC
25 | Care Plan Activity Kind | StructureDefinition/us-core-careplan | FHIR
26 | Care Plan Activity Outcome | StructureDefinition/us-core-careplan | FHIR
27 | Care Plan Category | StructureDefinition/us-core-careplan | FHIR
28 | Care Plan Intent | StructureDefinition/us-core-careplan | FHIR
29 | Care Team Member Function | StructureDefinition/us-core-careteam StructureDefinition/us-core-practitionerrole | VSAC
30 | Care Team category | StructureDefinition/us-core-careteam | FHIR
31 | CarePlanActivityStatus | StructureDefinition/us-core-careplan | FHIR
32 | CareTeamStatus | StructureDefinition/us-core-careteam | FHIR
33 | Codes for Immunization Site of Administration | StructureDefinition/us-core-immunization | FHIR
34 | Common Languages | StructureDefinition/us-core-specimen StructureDefinition/us-core-documentreference StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/us-core-procedure StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-careplan StructureDefinition/us-core-organization StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-head-circumference StructureDefinition/us-core-practitioner StructureDefinition/us-core-heart-rate StructureDefinition/us-core-practitionerrole StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-body-height StructureDefinition/us-core-patient StructureDefinition/us-core-provenance StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-body-temperature StructureDefinition/us-core-questionnaireresponse StructureDefinition/us-core-condition-encounter-diagnosis StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-implantable-device StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-medicationdispense StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-diagnosticreport-lab StructureDefinition/us-core-encounter StructureDefinition/us-core-bmi StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-coverage StructureDefinition/us-core-servicerequest StructureDefinition/us-core-simple-observation StructureDefinition/us-core-diagnosticreport-note StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-medication StructureDefinition/us-core-goal StructureDefinition/us-core-careteam StructureDefinition/us-core-observation-screening-assessment StructureDefinition/us-core-relatedperson StructureDefinition/us-core-immunization StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-location StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-allergyintolerance StructureDefinition/us-core-blood-pressure | FHIR
35 | Common Tags | StructureDefinition/us-core-diagnosticreport-lab StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-encounter StructureDefinition/us-core-observation-lab | FHIR
36 | Common substances for allergy and intolerance documentation including refutations | StructureDefinition/us-core-allergyintolerance | VSAC
37 | CompositionStatus | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
38 | Condition Category Codes | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
39 | Condition Clinical Status Codes | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
40 | Condition Stage | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
41 | Condition Stage Type | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
42 | Condition/Diagnosis Severity | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
43 | Condition/Problem/Diagnosis Codes | StructureDefinition/us-core-procedure | FHIR
44 | ConditionVerificationStatus | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
45 | Contact entity type | StructureDefinition/us-core-organization | FHIR
46 | ContactPointSystem | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-practitionerrole StructureDefinition/us-core-organization | FHIR
47 | ContactPointUse | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-practitionerrole StructureDefinition/us-core-organization | FHIR
48 | Coverage Class Codes | StructureDefinition/us-core-coverage | FHIR
49 | Coverage Copay Type Codes | StructureDefinition/us-core-coverage | FHIR
50 | DataAbsentReason | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-body-height StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-body-temperature StructureDefinition/us-core-observation-screening-assessment StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-blood-pressure | FHIR
51 | DaysOfWeek | StructureDefinition/us-core-practitionerrole StructureDefinition/us-core-location | FHIR
52 | Detailed Ethnicity Including Absence Reasons | StructureDefinition/us-core-ethnicity | VSAC
53 | Detailed race including absence reasons. | StructureDefinition/us-core-race | VSAC
54 | DeviceNameType | StructureDefinition/us-core-implantable-device | FHIR
55 | DiagnosisRole | StructureDefinition/us-core-encounter | FHIR
56 | Diagnostic Service Section Codes | StructureDefinition/us-core-diagnosticreport-note StructureDefinition/us-core-diagnosticreport-lab | FHIR
57 | DiagnosticReportStatus | StructureDefinition/us-core-diagnosticreport-note StructureDefinition/us-core-diagnosticreport-lab | FHIR
58 | Diet | StructureDefinition/us-core-encounter | FHIR
59 | Document Class Value Set | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
60 | Document Type Value Set | OperationDefinition/docref | FHIR
61 | DocumentReferenceStatus | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
62 | DocumentRelationshipType | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
63 | DoseAndRateType | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | FHIR
64 | Encounter Reason Codes | StructureDefinition/us-core-encounter | FHIR
65 | Encounter Type | StructureDefinition/us-core-encounter | VSAC
66 | EncounterLocationStatus | StructureDefinition/us-core-encounter | FHIR
67 | EncounterStatus | StructureDefinition/us-core-encounter | FHIR
68 | Ethnicity Categories | StructureDefinition/us-core-ethnicity | VSAC
69 | EventStatus | StructureDefinition/us-core-procedure | FHIR
70 | Example Coverage Financial Exception Codes | StructureDefinition/us-core-coverage | FHIR
71 | FHIR Device Types | StructureDefinition/us-core-implantable-device StructureDefinition/us-core-procedure | FHIR
72 | FHIR Specimen Collection Method | StructureDefinition/us-core-specimen | FHIR
73 | FHIRDeviceStatus | StructureDefinition/us-core-implantable-device | FHIR
74 | FHIRDeviceStatusReason | StructureDefinition/us-core-implantable-device | FHIR
75 | Facility Type Code Value Set | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
76 | Federal Administrative Sex | StructureDefinition/us-core-individual-sex | VSAC
77 | Financial Resource Status Codes | StructureDefinition/us-core-coverage | FHIR
78 | Gender Identity | StructureDefinition/us-core-genderIdentity | VSAC
79 | Goal achievement status | StructureDefinition/us-core-goal | FHIR
80 | Goal category | StructureDefinition/us-core-goal | FHIR
81 | Goal priority | StructureDefinition/us-core-goal | FHIR
82 | Goal start event | StructureDefinition/us-core-goal | FHIR
83 | GoalLifecycleStatus | StructureDefinition/us-core-goal | FHIR
84 | HL7 ValueSet of Format Codes for use with Document Sharing | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | THO
85 | Healthcare Provider Taxonomy | StructureDefinition/us-core-practitionerrole | VSAC
86 | Healthcare Service Location Type Combined | StructureDefinition/us-core-location | VSAC
87 | IdentifierType | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-encounter StructureDefinition/us-core-coverage StructureDefinition/us-core-organization | FHIR
88 | IdentifierUse | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-encounter StructureDefinition/us-core-coverage StructureDefinition/us-core-organization | FHIR
89 | Immunization Function Codes | StructureDefinition/us-core-immunization | FHIR
90 | Immunization Funding Source | StructureDefinition/us-core-immunization | FHIR
91 | Immunization Origin Codes | StructureDefinition/us-core-immunization | FHIR
92 | Immunization Program Eligibility | StructureDefinition/us-core-immunization | FHIR
93 | Immunization Reason Codes | StructureDefinition/us-core-immunization | FHIR
94 | Immunization Route Codes | StructureDefinition/us-core-immunization | FHIR
95 | Immunization Status Codes | StructureDefinition/us-core-immunization | FHIR
96 | Immunization Status Reason Codes | StructureDefinition/us-core-immunization | FHIR
97 | Immunization Subpotent Reason | StructureDefinition/us-core-immunization | FHIR
98 | Immunization Target Disease Codes | StructureDefinition/us-core-immunization | FHIR
99 | Industry NAICS Detail (ODH) | StructureDefinition/us-core-observation-occupation | PHINVADS
100 | Information Source for Medication Adherence | StructureDefinition/us-core-medication-adherence | VSAC
101 | LOINC Codes | StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-goal StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-observation-lab StructureDefinition/us-core-observation-screening-assessment StructureDefinition/us-core-simple-observation StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-observation-adi-documentation | FHIR
102 | Languages | StructureDefinition/us-core-patient | THO
103 | LinkType | StructureDefinition/us-core-patient | FHIR
104 | Location type | StructureDefinition/us-core-encounter StructureDefinition/us-core-location | FHIR
105 | LocationMode | StructureDefinition/us-core-location | FHIR
106 | LocationStatus | StructureDefinition/us-core-location | FHIR
107 | Manifestation and Symptom Codes | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
108 | MaritalStatus | StructureDefinition/us-core-patient | FHIR
109 | Medication status codes | StructureDefinition/us-core-medication | FHIR
110 | Medication Adherence | StructureDefinition/us-core-medication-adherence | VSAC
111 | Medication Clinical Drug | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medication StructureDefinition/us-core-medicationdispense | VSAC
112 | Medication dispense category codes | StructureDefinition/us-core-medicationdispense | FHIR
113 | Medication dispense performer function codes | StructureDefinition/us-core-medicationdispense | FHIR
114 | Medication dispense status codes | StructureDefinition/us-core-medicationdispense | FHIR
115 | Medication dispense status reason codes | StructureDefinition/us-core-medicationdispense | FHIR
116 | Medication request category codes | StructureDefinition/us-core-medicationrequest | FHIR
117 | Medication request course of therapy codes | StructureDefinition/us-core-medicationrequest | FHIR
118 | Medication request intent | StructureDefinition/us-core-medicationrequest | FHIR
119 | Medication request status reason codes | StructureDefinition/us-core-medicationrequest | FHIR
120 | Medicationrequest status | StructureDefinition/us-core-medicationrequest | FHIR
121 | MimeType | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
122 | NameUse | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient | FHIR
123 | Observation Category Codes | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-observation-lab StructureDefinition/us-core-bmi StructureDefinition/us-core-body-temperature StructureDefinition/us-core-observation-screening-assessment StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-vital-signs StructureDefinition/us-core-head-circumference StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-heart-rate StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-body-height StructureDefinition/us-core-blood-pressure | FHIR
124 | Observation Interpretation Codes | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-body-height StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-body-temperature StructureDefinition/us-core-observation-screening-assessment StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-blood-pressure | FHIR
125 | Observation Methods | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-body-height StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-body-temperature StructureDefinition/us-core-observation-screening-assessment StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-blood-pressure | FHIR
126 | Observation Reference Range Applies To Codes | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-body-height StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-body-temperature StructureDefinition/us-core-observation-screening-assessment StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-blood-pressure | FHIR
127 | Observation Reference Range Meaning Codes | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-body-height StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-body-temperature StructureDefinition/us-core-observation-screening-assessment StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-blood-pressure | FHIR
128 | ObservationStatus | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-body-height StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-body-temperature StructureDefinition/us-core-observation-screening-assessment StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-blood-pressure | FHIR
129 | Occupation ONETSOC Detail (ODH) | StructureDefinition/us-core-observation-occupation | PHINVADS
130 | Organization type | StructureDefinition/us-core-organization | FHIR
131 | Participant Roles | StructureDefinition/us-core-servicerequest | FHIR
132 | Participant type | StructureDefinition/us-core-encounter | FHIR
133 | Patient Contact Relationship | StructureDefinition/us-core-patient | FHIR
134 | Patient relationship type | StructureDefinition/us-core-relatedperson | FHIR
135 | Payer Type | StructureDefinition/us-core-coverage | VSAC
136 | Practice Setting Code Value Set | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
137 | Pregnancy Intention | StructureDefinition/us-core-observation-pregnancyintent | VSAC
138 | Pregnancy Status Observation | StructureDefinition/us-core-observation-pregnancystatus | VSAC
139 | Procedure Category Codes (SNOMED CT) | StructureDefinition/us-core-procedure | FHIR
140 | Procedure Codes (SNOMED CT) | StructureDefinition/us-core-careplan | FHIR
141 | Procedure Device Action Codes | StructureDefinition/us-core-procedure | FHIR
142 | Procedure Follow up Codes (SNOMED CT) | StructureDefinition/us-core-procedure | FHIR
143 | Procedure Not Performed Reason (SNOMED-CT) | StructureDefinition/us-core-procedure | FHIR
144 | Procedure Outcome Codes (SNOMED CT) | StructureDefinition/us-core-procedure | FHIR
145 | Procedure Performer Role Codes | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-procedure | FHIR
146 | Provenance activity type | StructureDefinition/us-core-provenance | FHIR
147 | ProvenanceEntityRole | StructureDefinition/us-core-provenance | FHIR
148 | PurposeOfUse | StructureDefinition/us-core-provenance | THO
149 | QuantityComparator | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-head-circumference StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-heart-rate StructureDefinition/us-core-body-weight StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-body-height StructureDefinition/us-core-blood-pressure | FHIR
150 | Questionnaire Answer Codes | StructureDefinition/us-core-questionnaireresponse | FHIR
151 | QuestionnaireResponseStatus | StructureDefinition/us-core-questionnaireresponse | FHIR
152 | Race Categories | StructureDefinition/us-core-race | VSAC
153 | Request priority | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-servicerequest | FHIR
154 | RequestIntent | StructureDefinition/us-core-servicerequest | FHIR
155 | RequestStatus | StructureDefinition/us-core-careplan StructureDefinition/us-core-servicerequest | FHIR
156 | ResourceType | StructureDefinition/us-core-provenance | FHIR
157 | Route of Administration of Therapeutic Agents | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | VSAC
158 | SNOMED CT Additional Dosage Instructions | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | FHIR
159 | SNOMED CT Administration Method Codes | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | FHIR
160 | SNOMED CT Anatomical Structure for Administration Site Codes | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | FHIR
161 | SNOMED CT Body Structures | StructureDefinition/us-core-specimen StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/us-core-procedure StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-servicerequest StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-body-height StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-body-temperature StructureDefinition/us-core-observation-screening-assessment StructureDefinition/us-core-condition-encounter-diagnosis StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-blood-pressure | FHIR
162 | SNOMED CT Clinical Findings | StructureDefinition/us-core-diagnosticreport-note StructureDefinition/us-core-diagnosticreport-lab StructureDefinition/us-core-careteam StructureDefinition/us-core-goal StructureDefinition/us-core-careplan StructureDefinition/us-core-allergyintolerance | FHIR
163 | SNOMED CT Form Codes | StructureDefinition/us-core-medication | FHIR
164 | SNOMED CT Medication As Needed Reason Codes | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense StructureDefinition/us-core-servicerequest | FHIR
165 | SNOMED CT Medication Codes | StructureDefinition/us-core-careplan | FHIR
166 | SNOMED CT Route Codes | StructureDefinition/us-core-allergyintolerance | FHIR
167 | Screening and Assessment Survey Codes | StructureDefinition/us-core-observation-screening-assessment | VSAC
168 | SecurityLabels | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-diagnosticreport-lab StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-documentreference StructureDefinition/us-core-encounter StructureDefinition/us-core-observation-lab | FHIR
169 | SecurityRoleType | StructureDefinition/us-core-provenance | FHIR
170 | Service Request Category Codes | ValueSet/us-core-servicerequest-category StructureDefinition/us-core-servicerequest | FHIR
171 | Service Request Order Details Codes | StructureDefinition/us-core-servicerequest | FHIR
172 | Service type | StructureDefinition/us-core-encounter | FHIR
173 | ServiceDeliveryLocationRoleType | StructureDefinition/us-core-location StructureDefinition/us-core-servicerequest | THO
174 | Sex | StructureDefinition/us-core-sex | VSAC
175 | Sexual Orientation Including nulls and Data Absent Reason | StructureDefinition/us-core-observation-sexual-orientation | VSAC
176 | Smoking Status Type | StructureDefinition/us-core-smokingstatus | VSAC
177 | Smoking status comprehensive | StructureDefinition/us-core-smokingstatus | VSAC
178 | Social Determinants of Health Goals | StructureDefinition/us-core-goal | VSAC
179 | Special arrangements | StructureDefinition/us-core-encounter | FHIR
180 | Special courtesy | StructureDefinition/us-core-encounter | FHIR
181 | Specimen Condition SCT | ValueSet/us-core-specimen-condition | VSAC
182 | Specimen Container Type | StructureDefinition/us-core-specimen | FHIR
183 | Specimen processing procedure | StructureDefinition/us-core-specimen | FHIR
184 | Specimen type | StructureDefinition/us-core-specimen | VSAC
185 | SpecimenStatus | StructureDefinition/us-core-specimen | FHIR
186 | SubscriberPolicyholder Relationship Codes | StructureDefinition/us-core-coverage | FHIR
187 | Substance Code | StructureDefinition/us-core-allergyintolerance | FHIR
188 | SubstanceAdminSubstitutionReason | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | THO
189 | TribalEntityUS | StructureDefinition/us-core-tribal-affiliation | THO
190 | UDIEntryType | StructureDefinition/us-core-implantable-device | FHIR
191 | US Core Clinical Note Type |  | US CORE
192 | US Core Clinical Result Observation Category | StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-observation-lab | US CORE
193 | US Core Condition Codes | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-procedure StructureDefinition/us-core-servicerequest StructureDefinition/us-core-condition-encounter-diagnosis | US CORE
194 | US Core Condition Codes Current | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | US CORE
195 | US Core Diagnostic Report Category Codes | StructureDefinition/us-core-diagnosticreport-note | US CORE
196 | US Core DocumentReference Category | StructureDefinition/us-core-documentreference | US CORE
197 | US Core DocumentReference Type | StructureDefinition/us-core-documentreference | US CORE
198 | US Core Goal Codes | StructureDefinition/us-core-goal | US CORE
199 | US Core Laboratory Test Codes | StructureDefinition/us-core-diagnosticreport-lab StructureDefinition/us-core-observation-lab | US CORE
200 | US Core Narrative Status | StructureDefinition/us-core-careplan | US CORE
201 | US Core Non Laboratory Codes | StructureDefinition/us-core-diagnosticreport-note | US CORE
202 | US Core Problem or Health Concern | StructureDefinition/us-core-condition-problems-health-concerns | US CORE
203 | US Core Procedure Codes | StructureDefinition/us-core-procedure StructureDefinition/us-core-servicerequest | US CORE
204 | US Core Provenance Participant Type Codes | StructureDefinition/us-core-provenance | US CORE
205 | US Core Screening Assessment Condition Category |  | US CORE
206 | US Core Screening Assessment Observation Category | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-observation-screening-assessment | US CORE
207 | US Core Screening Assessment Observation Maximum Category | StructureDefinition/us-core-observation-screening-assessment | US CORE
208 | US Core ServiceRequest Category Codes | StructureDefinition/us-core-servicerequest | US CORE
209 | US Core Simple Observation Category | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-simple-observation | US CORE
210 | US Core Specimen Condition | StructureDefinition/us-core-specimen | US CORE
211 | US Core Status for Smoking Status Observation | StructureDefinition/us-core-smokingstatus | US CORE
212 | USEncounterDischargeDisposition | StructureDefinition/us-core-encounter | THO
213 | USPS Two Letter Alphabetic Codes | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-location StructureDefinition/us-core-organization StructureDefinition/us-core-jurisdiction | THO
214 | UnitsOfMeasureCaseSensitive | StructureDefinition/us-core-smokingstatus | THO
215 | Vital Sign Result Type | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-vital-signs StructureDefinition/us-core-head-circumference StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-heart-rate StructureDefinition/us-core-body-weight StructureDefinition/us-core-body-height StructureDefinition/us-core-blood-pressure | VSAC
216 | Vital Signs Units | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-vital-signs StructureDefinition/us-core-head-circumference StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-heart-rate StructureDefinition/us-core-body-weight StructureDefinition/us-core-body-height StructureDefinition/us-core-blood-pressure | FHIR
217 | hl7VS-additivePreservative | StructureDefinition/us-core-specimen | THO
218 | hl7VS-bedStatus | StructureDefinition/us-core-location | THO
219 | hl7VS-re-admissionIndicator | StructureDefinition/us-core-encounter | THO
220 | hl7VS-relevantClincialInformation | StructureDefinition/us-core-specimen | THO
221 | hl7VS-specimenCondition | ValueSet/us-core-specimen-condition | THO
222 | v2 table 0360 | FHIR Value set/code system definition for HL7 v2 table 0360 ver 2.9 ( Degree/License/Certificate) | THO
223 | v3 Code System ActCode | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | THO

### Code Systems

See the FHIR terminology section for a complete discussion on code systems and a list of code system names used in FHIR. Most code systems used in this guide are defined in the base FHIR specification. However, the following code systems are unique to this guide and not listed in the base FHIR specification. If a URI is listed here, it SHALL be used in the US Core profiles to identify the code system in preference to any other code system URI.

#### Code systems published in this IG*- Includes US Core defined code systems and externally defined code systems

- US Core CarePlan Category Extension Codes
- US Core Category
- US Core Condition Category Extension Codes
- US Core DocumentReferences Category Codes
- US Core Provenance Participant Type Extension Codes

#### Externally Published code systems

URI | Source | Comment | OID (for non-FHIR systems)
--- | --- | --- | ---
`https://www.cms.gov/Medicare/Coding/HCPCSReleaseCodeSets` | CMS | Healthcare Common Procedure Coding System (HCPCS) Level II alphanumeric codes | 2.16.840.1.113883.6.285
`http://www.cms.gov/Medicare/Coding/ICD10` | CMS | International Classification of Diseases, 10th Revision, Procedure Coding System (ICD-10-PCS) - See ICD-10 PCS Codes for online access to codes for general information purposes. | 2.16.840.1.113883.6.4
`http://www.ada.org/cdt` | ADA | Code on Dental Procedures and Nomenclature | 2.16.840.1.113883.6.13
`https://www.usps.com` | USPS | United States Postal Service Two–Letter State and Possession Abbreviations | 2.16.840.1.113883.6.92

#### Code System Used in US Core

The following table lists all the CodeSystems used in US Core and where they can be found. This information is also available as a csv or excel file.

Code System Sources:

- FHIR
- US CORE
- THO
- SNOMED
- LOINC
- UCUM
- CDC
- Code systems published by other standards organizations

Row # | Code System | Code System URI | Value Sets Where Used | Source
--- | --- | --- | --- | ---
1 |  | `http://dicom.nema.org/resources/ontology/DCM` | ValueSet/security-role-type | Other
2 | AHA NUBC Patient Discharge Status Codes | `https://www.nubc.org/CodeSystem/PatDischargeStatus` | ValueSet/v3-USEncounterDischargeDisposition | Other
3 | ActCode | `http://terminology.hl7.org/CodeSystem/v3-ActCode` | ValueSet/v3-ActPharmacySupplyType ValueSet/v3-ActCode ValueSet/provenance-activity-type ValueSet/v3-ActEncounterCode | THO
4 | ActPriority | `http://terminology.hl7.org/CodeSystem/v3-ActPriority` | ValueSet/v3-ActPriority | THO
5 | ActReason | `http://terminology.hl7.org/CodeSystem/v3-ActReason` | ValueSet/v3-PurposeOfUse ValueSet/immunization-status-reason ValueSet/v3-SubstanceAdminSubstitutionReason | THO
6 | ActSite | `http://terminology.hl7.org/CodeSystem/v3-ActSite` | ValueSet/immunization-site | THO
7 | AddressType | `http://hl7.org/fhir/address-type` | ValueSet/address-type | FHIR
8 | AddressUse | `http://hl7.org/fhir/address-use` | ValueSet/address-use | FHIR
9 | AdministrativeGender | `http://hl7.org/fhir/administrative-gender` | ValueSet/administrative-gender | FHIR
10 | Admit source | `http://terminology.hl7.org/CodeSystem/admit-source` | ValueSet/encounter-admit-source | THO
11 | AllergyIntolerance Clinical Status Codes | `http://terminology.hl7.org/CodeSystem/allergyintolerance-clinical` | ValueSet/allergyintolerance-clinical | THO
12 | AllergyIntolerance Verification Status | `http://terminology.hl7.org/CodeSystem/allergyintolerance-verification` | ValueSet/allergyintolerance-verification | THO
13 | AllergyIntoleranceCategory | `http://hl7.org/fhir/allergy-intolerance-category` | ValueSet/allergy-intolerance-category | FHIR
14 | AllergyIntoleranceCriticality | `http://hl7.org/fhir/allergy-intolerance-criticality` | ValueSet/allergy-intolerance-criticality | FHIR
15 | AllergyIntoleranceSeverity | `http://hl7.org/fhir/reaction-event-severity` | ValueSet/reaction-event-severity | FHIR
16 | AllergyIntoleranceType | `http://hl7.org/fhir/allergy-intolerance-type` | ValueSet/allergy-intolerance-type | FHIR
17 | CMS Place of Service Codes (POS) | `https://www.cms.gov/Medicare/Coding/place-of-service-codes/Place_of_Service_Code_Set` | ValueSet/CMSPlaceOfServiceCodes | Other
18 | CarePlanActivityStatus | `http://hl7.org/fhir/care-plan-activity-status` | ValueSet/care-plan-activity-status | FHIR
19 | CareTeamStatus | `http://hl7.org/fhir/care-team-status` | ValueSet/care-team-status | FHIR
20 | Code on Dental Procedures and Nomenclature | `http://www.ada.org/cdt` | ValueSet/us-core-procedure-code | Other
21 | Common Tags | `http://terminology.hl7.org/CodeSystem/common-tags` | ValueSet/common-tags | THO
22 | CompositionStatus | `http://hl7.org/fhir/composition-status` | ValueSet/composition-status | FHIR
23 | Condition Category Codes | `http://terminology.hl7.org/CodeSystem/condition-category` | ValueSet/condition-category ValueSet/us-core-problem-or-health-concern | THO
24 | Condition Clinical Status Codes | `http://terminology.hl7.org/CodeSystem/condition-clinical` | ValueSet/condition-clinical | THO
25 | ConditionVerificationStatus | `http://terminology.hl7.org/CodeSystem/condition-ver-status` | ValueSet/condition-ver-status | THO
26 | Contact entity type | `http://terminology.hl7.org/CodeSystem/contactentity-type` | ValueSet/contactentity-type | THO
27 | ContactPointSystem | `http://hl7.org/fhir/contact-point-system` | ValueSet/contact-point-system | FHIR
28 | ContactPointUse | `http://hl7.org/fhir/contact-point-use` | ValueSet/contact-point-use | FHIR
29 | Contract Signer Type Codes | `http://terminology.hl7.org/CodeSystem/contractsignertypecodes` | ValueSet/security-role-type | THO
30 | Coverage Class Codes | `http://terminology.hl7.org/CodeSystem/coverage-class` | ValueSet/coverage-class | THO
31 | Coverage Copay Type Codes | `http://terminology.hl7.org/CodeSystem/coverage-copay-type` | ValueSet/coverage-copay-type | THO
32 | Current Procedural Terminology (CPT®) | `http://www.ama-assn.org/go/cpt` | ValueSet/us-core-procedure-code | Other
33 | DataAbsentReason | `http://terminology.hl7.org/CodeSystem/data-absent-reason` | ValueSet/data-absent-reason | THO
34 | DataOperation | `http://terminology.hl7.org/CodeSystem/v3-DataOperation` | ValueSet/provenance-activity-type | THO
35 | DaysOfWeek | `http://hl7.org/fhir/days-of-week` | ValueSet/days-of-week | FHIR
36 | DeviceNameType | `http://hl7.org/fhir/device-nametype` | ValueSet/device-nametype | FHIR
37 | Diagnosis Role | `http://terminology.hl7.org/CodeSystem/diagnosis-role` | ValueSet/diagnosis-role | THO
38 | DiagnosticReportStatus | `http://hl7.org/fhir/diagnostic-report-status` | ValueSet/diagnostic-report-status | FHIR
39 | Diet | `http://terminology.hl7.org/CodeSystem/diet` | ValueSet/encounter-diet | THO
40 | DocumentCompletion | `http://terminology.hl7.org/CodeSystem/v3-DocumentCompletion` | ValueSet/provenance-activity-type | THO
41 | DocumentReferenceStatus | `http://hl7.org/fhir/document-reference-status` | ValueSet/document-reference-status | FHIR
42 | DocumentRelationshipType | `http://hl7.org/fhir/document-relationship-type` | ValueSet/document-relationship-type | FHIR
43 | DoseAndRateType | `http://terminology.hl7.org/CodeSystem/dose-rate-type` | ValueSet/dose-rate-type | THO
44 | EncounterLocationStatus | `http://hl7.org/fhir/encounter-location-status` | ValueSet/encounter-location-status | FHIR
45 | EncounterSpecialCourtesy | `http://terminology.hl7.org/CodeSystem/v3-EncounterSpecialCourtesy` | ValueSet/encounter-special-courtesy | THO
46 | EncounterStatus | `http://hl7.org/fhir/encounter-status` | ValueSet/encounter-status | FHIR
47 | EventStatus | `http://hl7.org/fhir/event-status` | ValueSet/immunization-status ValueSet/event-status | FHIR
48 | Example Coverage Financial Exception Codes | `http://terminology.hl7.org/CodeSystem/ex-coverage-financial-exception` | ValueSet/coverage-financial-exception | THO
49 | FHIRDeviceStatus | `http://hl7.org/fhir/device-status` | ValueSet/device-status | FHIR
50 | FHIRDeviceStatusReason | `http://terminology.hl7.org/CodeSystem/device-status-reason` | ValueSet/device-status-reason | THO
51 | Financial Resource Status Codes | `http://hl7.org/fhir/fm-status` | ValueSet/fm-status | FHIR
52 | Goal achievement status | `http://terminology.hl7.org/CodeSystem/goal-achievement` | ValueSet/goal-achievement | THO
53 | Goal category | `http://terminology.hl7.org/CodeSystem/goal-category` | ValueSet/goal-category | THO
54 | Goal priority | `http://terminology.hl7.org/CodeSystem/goal-priority` | ValueSet/goal-priority | THO
55 | GoalLifecycleStatus | `http://hl7.org/fhir/goal-status` | ValueSet/goal-status | FHIR
56 | HL7 Document Format Codes | `http://terminology.hl7.org/CodeSystem/v3-HL7DocumentFormatCodes` | ValueSet/v3-HL7FormatCodes | THO
57 | ICD-10 Procedure Codes | `http://www.cms.gov/Medicare/Coding/ICD10` | ValueSet/us-core-procedure-code | Other
58 | ICD-9-CM | `http://hl7.org/fhir/sid/icd-9-cm` | ValueSet/us-core-condition-code | CDC
59 | IHE Format Code set for use with Document Sharing | `http://ihe.net/fhir/ihe.formatcode.fhir/CodeSystem/formatcode` | ValueSet/v3-HL7FormatCodes | Other
60 | IdentifierUse | `http://hl7.org/fhir/identifier-use` | ValueSet/identifier-use | FHIR
61 | Immunization Funding Source | `http://terminology.hl7.org/CodeSystem/immunization-funding-source` | ValueSet/immunization-funding-source | THO
62 | Immunization Origin Codes | `http://terminology.hl7.org/CodeSystem/immunization-origin` | ValueSet/immunization-origin | THO
63 | Immunization Program Eligibility | `http://terminology.hl7.org/CodeSystem/immunization-program-eligibility` | ValueSet/immunization-program-eligibility | THO
64 | Immunization Subpotent Reason | `http://terminology.hl7.org/CodeSystem/immunization-subpotent-reason` | ValueSet/immunization-subpotent-reason | THO
65 | International Classification of Diseases | `http://hl7.org/fhir/sid/icd-10-cm` | Clinical Modification (ICD-10-CM) | CDC
66 | LinkType | `http://hl7.org/fhir/link-type` | ValueSet/link-type | FHIR
67 | Location type | `http://terminology.hl7.org/CodeSystem/location-physical-type` | ValueSet/location-physical-type | THO
68 | LocationMode | `http://hl7.org/fhir/location-mode` | ValueSet/location-mode | FHIR
69 | LocationStatus | `http://hl7.org/fhir/location-status` | ValueSet/location-status | FHIR
70 | Logical Observation Identifiers | `http://loinc.org` | LOINC provides a set of universal names and ID codes for identifying laboratory and clinical test results.1 2 LOINC facilitates the exchange and pooling of results such as blood hemoglobin serum potassium or vital signs for clinical care outcomes management and research. LOINC's universal identifiers (names and codes) can be used in the context of order and observation exchanges between information systems that use syntax standards such as HL73 CEN TC251 ISO TC215 ASTM4 and DICOM. Specifically the identifier can be used as the coded value for an observation in any other standard that uses the observation/observation value paradigm whether messages documents application programming interface (API) etc. For example LOINC codes are used widely in the OBX segment Observation Identifier field (OBX-3) of an ORU HL7 (HL7 version 2.x or ASTM 1238-9410) message that may be sent between a Clinical Laboratory Information Management Systems (LIMS) and Electronic Health Record Systems (EHR).5 6 In this way LOINC codes provide universal identifiers that allow the exchange of clinical data between heterogeneous computing environments. | LOINC
71 | MaritalStatus | `http://terminology.hl7.org/CodeSystem/v3-MaritalStatus` | ValueSet/marital-status | THO
72 | Medication status codes | `http://hl7.org/fhir/CodeSystem/medication-status` | ValueSet/medication-status | FHIR
73 | Medication dispense category codes | `http://terminology.hl7.org/fhir/CodeSystem/medicationdispense-category` | ValueSet/medicationdispense-category | THO
74 | Medication dispense status codes | `http://terminology.hl7.org/CodeSystem/medicationdispense-status` | ValueSet/medicationdispense-status | THO
75 | Medication dispense status reason codes | `http://terminology.hl7.org/fhir/CodeSystem/medicationdispense-status-reason` | ValueSet/medicationdispense-status-reason | THO
76 | Medication request intent | `http://hl7.org/fhir/CodeSystem/medicationrequest-intent` | ValueSet/medicationrequest-intent | FHIR
77 | MedicationDispense Performer Function Codes | `http://terminology.hl7.org/CodeSystem/medicationdispense-performer-function` | ValueSet/medicationdispense-performer-function | THO
78 | MedicationRequest Category Codes | `http://terminology.hl7.org/CodeSystem/medicationrequest-category` | ValueSet/medicationrequest-category | THO
79 | MedicationRequest Course of Therapy Codes | `http://terminology.hl7.org/CodeSystem/medicationrequest-course-of-therapy` | ValueSet/medicationrequest-course-of-therapy | THO
80 | MedicationRequest Status Reason Codes | `http://terminology.hl7.org/CodeSystem/medicationrequest-status-reason` | ValueSet/medicationrequest-status-reason | THO
81 | Medicationrequest status | `http://hl7.org/fhir/CodeSystem/medicationrequest-status` | ValueSet/medicationrequest-status | FHIR
82 | NUCC Provider Taxonomy | `http://nucc.org/provider-taxonomy` | ValueSet/2.16.840.1.114222.4.11.1066 | Other
83 | NameUse | `http://hl7.org/fhir/name-use` | ValueSet/name-use | FHIR
84 | NarrativeStatus | `http://hl7.org/fhir/narrative-status` | ValueSet/us-core-narrative-status | FHIR
85 | NullFlavor | `http://terminology.hl7.org/CodeSystem/v3-NullFlavor` | ValueSet/us-core-documentreference-type ValueSet/marital-status ValueSet/encounter-special-courtesy | THO
86 | Observation Category Codes | `http://terminology.hl7.org/CodeSystem/observation-category` | ValueSet/us-core-screening-assessment-observation-category ValueSet/us-core-simple-observation-category ValueSet/us-core-clinical-result-observation-category ValueSet/observation-category ValueSet/us-core-screening-assessment-observation-maximum-category | THO
87 | Observation Reference Range Meaning Codes | `http://terminology.hl7.org/CodeSystem/referencerange-meaning` | ValueSet/referencerange-meaning | THO
88 | ObservationInterpretation | `http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation` | ValueSet/observation-interpretation | THO
89 | ObservationStatus | `http://hl7.org/fhir/observation-status` | ValueSet/us-core-observation-smoking-status-status ValueSet/observation-status | FHIR
90 | Occupational Data for Health (ODH) | `http://terminology.hl7.org/CodeSystem/PHOccupationalDataForHealthODH` | ValueSet/2.16.840.1.114222.4.11.7900 ValueSet/2.16.840.1.114222.4.11.7901 | THO
91 | Organization type | `http://terminology.hl7.org/CodeSystem/organization-type` | ValueSet/organization-type | THO
92 | Participant type | `http://terminology.hl7.org/CodeSystem/participant-type` | ValueSet/encounter-participant-type | THO
93 | ParticipationFunction | `http://terminology.hl7.org/CodeSystem/v3-ParticipationFunction` | ValueSet/security-role-type | THO
94 | ParticipationType | `http://terminology.hl7.org/CodeSystem/v3-ParticipationType` | ValueSet/security-role-type ValueSet/encounter-participant-type ValueSet/provenance-activity-type | THO
95 | Provenance participant type | `http://terminology.hl7.org/CodeSystem/provenance-participant-type` | ValueSet/us-core-provenance-participant-type | THO
96 | ProvenanceEntityRole | `http://hl7.org/fhir/provenance-entity-role` | ValueSet/provenance-entity-role | FHIR
97 | QuantityComparator | `http://hl7.org/fhir/quantity-comparator` | ValueSet/quantity-comparator | FHIR
98 | QuestionnaireResponseStatus | `http://hl7.org/fhir/questionnaire-answers-status` | ValueSet/questionnaire-answers-status | FHIR
99 | RequestIntent | `http://hl7.org/fhir/request-intent` | ValueSet/request-intent ValueSet/care-plan-intent | FHIR
100 | RequestPriority | `http://hl7.org/fhir/request-priority` | ValueSet/request-priority | FHIR
101 | RequestStatus | `http://hl7.org/fhir/request-status` | ValueSet/request-status | FHIR
102 | ResourceType | `http://hl7.org/fhir/resource-types` | ValueSet/resource-types ValueSet/care-plan-activity-kind | FHIR
103 | RoleClass | `http://terminology.hl7.org/CodeSystem/v3-RoleClass` | ValueSet/security-role-type | THO
104 | RoleCode | `http://terminology.hl7.org/CodeSystem/v3-RoleCode` | ValueSet/security-role-type ValueSet/relatedperson-relationshiptype ValueSet/v3-ServiceDeliveryLocationRoleType | THO
105 | RouteOfAdministration | `http://terminology.hl7.org/CodeSystem/v3-RouteOfAdministration` | ValueSet/immunization-route | THO
106 | SNOMED CT (all versions) | `http://snomed.info/sct` | ValueSet/servicerequest-category ValueSet/specimen-container-type ValueSet/2.16.840.1.113762.1.4.1099.54 ValueSet/procedure-followup ValueSet/us-core-goal-description ValueSet/specimen-collection-method ValueSet/us-core-condition-code-current ValueSet/medication-form-codes ValueSet/body-site ValueSet/manifestation-or-symptom ValueSet/goal-start-event ValueSet/procedure-code ValueSet/medication-as-needed-reason ValueSet/2.16.840.1.113762.1.4.1166.22 ValueSet/c80-facilitycodes ValueSet/2.16.840.1.113762.1.4.1267.3 ValueSet/immunization-reason ValueSet/substance-code ValueSet/observation-methods ValueSet/us-core-procedure-code ValueSet/care-plan-category ValueSet/questionnaire-answers ValueSet/servicerequest-orderdetail ValueSet/clinical-findings ValueSet/condition-stage ValueSet/immunization-target-disease ValueSet/encounter-reason ValueSet/participant-role ValueSet/additional-instruction-codes ValueSet/approach-site-codes ValueSet/device-action ValueSet/us-core-condition-code ValueSet/medication-codes ValueSet/device-kind ValueSet/performer-role ValueSet/us-core-servicerequest-category ValueSet/c80-practice-codes ValueSet/referencerange-appliesto ValueSet/route-codes ValueSet/procedure-outcome ValueSet/care-plan-activity-outcome ValueSet/2.16.840.1.113762.1.4.1021.121 ValueSet/procedure-category ValueSet/condition-code ValueSet/condition-stage-type ValueSet/procedure-not-performed-reason ValueSet/immunization-status-reason ValueSet/administration-method-codes ValueSet/condition-severity | SNOMED
107 | Security Role Type | `http://terminology.hl7.org/CodeSystem/extra-security-role-type` | ValueSet/security-role-type | THO
108 | Service type | `http://terminology.hl7.org/CodeSystem/service-type` | ValueSet/service-type | THO
109 | Source of Payment Typology | `https://nahdo.org/sopt` | ValueSet/2.16.840.1.114222.4.11.3591 | Other
110 | Special arrangements | `http://terminology.hl7.org/CodeSystem/encounter-special-arrangements` | ValueSet/encounter-special-arrangements | THO
111 | SpecimenStatus | `http://hl7.org/fhir/specimen-status` | ValueSet/specimen-status | FHIR
112 | SubscriberPolicyholder Relationship Codes | `http://terminology.hl7.org/CodeSystem/subscriber-relationship` | ValueSet/subscriber-relationship | THO
113 | Substance Admin Substitution | `http://terminology.hl7.org/CodeSystem/v3-substanceAdminSubstitution` | ValueSet/v3-ActSubstanceAdminSubstitutionCode | THO
114 | Tags for the Identification of Languages | `urn:ietf:bcp:47` | ValueSet/languages ValueSet/Languages | Other
115 | TribalEntityUS | `http://terminology.hl7.org/CodeSystem/v3-TribalEntityUS` | ValueSet/v3-TribalEntityUS | THO
116 | UDIEntryType | `http://hl7.org/fhir/udi-entry-type` | ValueSet/udi-entry-type | FHIR
117 | US Core Category | `http://hl7.org/fhir/us/core/CodeSystem/us-core-category` | ValueSet/us-core-screening-assessment-observation-category ValueSet/us-core-simple-observation-category ValueSet/us-core-servicerequest-category ValueSet/us-core-screening-assessment-condition-category ValueSet/us-core-screening-assessment-observation-maximum-category | US CORE
118 | US Core Condition Category Extension Codes | `http://hl7.org/fhir/us/core/CodeSystem/condition-category` | ValueSet/us-core-problem-or-health-concern | US CORE
119 | US Core DocumentReferences Category Codes | `http://hl7.org/fhir/us/core/CodeSystem/us-core-documentreference-category` | ValueSet/us-core-documentreference-category | US CORE
120 | US Core Provenance Participant Type Extension Codes | `http://hl7.org/fhir/us/core/CodeSystem/us-core-provenance-participant-type` | ValueSet/us-core-provenance-participant-type | US CORE
121 | US State Codes | `https://www.usps.com/` | ValueSet/USPS-State | Other
122 | Unified Code for Units of Measure (UCUM) | `http://unitsofmeasure.org` | ValueSet/ucum-bodyweight ValueSet/ucum-bodytemp ValueSet/ucum-common ValueSet/ucum-vitals-common ValueSet/v3-UnitsOfMeasureCaseSensitive ValueSet/ucum-bodylength | UCUM
123 | Vaccine Administered Code Set (CVX) | `http://hl7.org/fhir/sid/cvx` | ValueSet/2.16.840.1.113762.1.4.1010.6 | CDC
124 | additivePreservative | `http://terminology.hl7.org/CodeSystem/v2-0371` | ValueSet/v2-0371 | THO
125 | bedStatus | `http://terminology.hl7.org/CodeSystem/v2-0116` | ValueSet/v2-0116 | THO
126 | contactRole2 | `http://terminology.hl7.org/CodeSystem/v2-0131` | ValueSet/relatedperson-relationshiptype ValueSet/patient-contactrelationship | THO
127 | diagnosticServiceSectionId | `http://terminology.hl7.org/CodeSystem/v2-0074` | ValueSet/diagnostic-service-sections | THO
128 | identifierType | `http://terminology.hl7.org/CodeSystem/v2-0203` | ValueSet/identifier-type | THO
129 | providerRole | `http://terminology.hl7.org/CodeSystem/v2-0443` | ValueSet/immunization-function | THO
130 | re-admissionIndicator | `http://terminology.hl7.org/CodeSystem/v2-0092` | ValueSet/v2-0092 | THO
131 | relevantClincialInformation | `http://terminology.hl7.org/CodeSystem/v2-0916` | ValueSet/v2-0916 | THO
132 | treatment | `http://terminology.hl7.org/CodeSystem/v2-0373` | ValueSet/specimen-processing-procedure | THO

### The Value Set Authority Center (VSAC)

This guide links terminology directly to the FHIR® Terminology Service for VSAC Resources (Value Set Authority Center (VSAC)), where applicable, using a RESTful API service to access the VSAC value sets and supported code systems. See the table above for a list of value sets used in US Core that VSAC defines.

#### How to Acess Value Sets in VSAC

- VSAC requires login using your own UMLS API Key to view the value sets. VSAC UMLS Licensing information. (See the screenshots below)
- The value sets in VSAC are specified using a VSAC value set OID.

- To view the value set expansion in the VSAC user interface, use:

  `GET https://vsac.nlm.nih.gov/ValueSet/[VSAC OID]/expansion`

  An example of this is shown in the screenshots below.

  When viewing a ValueSet in the VSAC UI, the Code System OIDs and VSAC Code System names are displayed for each code. However, these code system identifiers SHOULD NOT be used. The FHIR URIs code systems are defined as part of FHIR and SHOULD be used instead. Unfortunately, the FHIR URI for the code system is not shown. As a convenience for the reader, a VSAC to FHIR Code System Mapping Table is provided, which maps the VSAC Code System names to the corresponding FHIR URI. For more information, see this documentation describing the relationships between the VSAC value set name, FHIR value set name, and FHIR value set title and how to access VSAC's FHIR API.

- To fetch the FHIR ValueSet resource (in other words, the value set definition), use:

  `GET https://cts.nlm.nih.gov/fhir/ValueSet/[VSAC OID]`

- To fetch the FHIR ValueSet resource expansion, use the FHIR `$expand` operation:

  `GET https://cts.nlm.nih.gov/fhir/ValueSet/[VSAC OID]/$expand`

For more information, refer to the FHIR Terminology Service for VSAC Resources

##### Example

For example, the US Core Smoking Status Observation Profile `valueCodeableConcept` element has a preferred binding to the Smoking Status value set. To access it in VSAC, click on the link to `https://vsac.nlm.nih.gov/valueset/2.16.840.1.113883.11.20.9.38/expansion`:

Figure 1: VSAC link

The reader is redirected to the VSAC login page to enter an API Key (only one login is required per session):

Figure 2: VSAC API-Key Login

After successfully entering the API Key, the value set can be inspected, downloaded, etc., using the VSAC User interface, as shown in the figure below. This FHIR ValueSet resource can also be fetched using the URL `https://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113883.11.20.9.38`, and the FHIR ValueSet expansion using the URL `https://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113883.11.20.9.38/$expand`.

Figure 3: VSAC Smoking Status ValueSet