HL7 v2.8.2 Vocabulary
0.2.0 - ci-build

HL7 v2.8.2 Vocabulary, published by HL7/FO. This guide is not an authorized publication; it is the continuous build for version 0.2.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/frankoemig/hl7.v2.terminology.v282/ and changes regularly. See the Directory of published versions

## CodeSystem: Interpretation Codes (2.8.2 - 2.2.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/CodeSystem/observationInterpretation | Version: 2.2.0
Active as of 2026-03-13 | Computable Name: ObservationInterpretation
Other Identifiers: OID:2.16.840.1.113883.5.83, urn:ietf:rfc:3986#Uniform Resource Identifier (URI)#http://terminology.hl7.org/v2plusvocab/CodeSystem/v2-0078
Copyright/Legal: HL7 Inc., 2026

HL7-defined code system of concepts which specify a categorical assessment of an observation value. Used in HL7 Version 2.x messaging in the OBX segment. Notes: This is being communicated in v2.x in OBX-8, in v3 in ObservationInterpretation (CWE) in R1 (Representative Realm) and in FHIR Observation.interpretation.

This Code system is referenced in the content logical definition of the following value sets:

- Hl7VSinterpretationCode

Properties

This code system defines the following properties for its concepts

Name | Code | URI | Type | Description
version introduced | versionIntroduced | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionIntroduced | string | version when was this code introduced
version deprecated | versionDeprecated | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionDeprecated | string | version when was this code deprecated
status | status | http://hl7.org/fhir/concept-properties#status | code | A code that indicates the status of the concept. Typical values are active, experimental, deprecated, and retired
comment, to suppress IG-publisher warning, to be replaced with standard later | comment | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#comment | string | A string that provides additional detail pertinent to the use or understanding of the concept
usage | usage | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#usage | string | usage notes for this code
modified | modified | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#modified | dateTime | date of last modification

Concepts

This case-sensitive code system `http://terminology.hl7.org/v2plusvocab/CodeSystem/observationInterpretation` defines the following codes:

Code | Display | Definition | version introduced | modified | Deutsch (German, de)
< | Off scale low | Off scale low | 2.1 | 2015-07-13 |
> | Off scale high | Off scale high | 2.2 | 2015-07-13 |
A | Abnormal | Abnormal | 2.1 | 2015-07-13 | anormal
AA | Critically abnormal | Critically abnormal | 2.1 | 2015-07-13 |
AC | Anti-complementary substances present | Anti-complementary substances present | 2.7 | 2015-07-13 |
B | Better | Better (use when direction not relevant) | 2.2 | 2025-08-02 | besser
D | Significant change down | Significant change down | 2.1 | 2015-07-13 | Deutlicher Trend nach unten
DET | Detected | Detected | 2.7 | 2015-07-13 |
H | High | High | 2.1 | 2015-07-13 |
HH | Critically high | Critically high | 2.1 | 2015-07-13 |
HM | Hold for Medical Review | Hold for Medical Review | 2.8 | 2015-07-13 |
HU | Very high | Very high |  | 2015-07-13 |
I | Intermediate | Intermediate | 2.1 | 2015-07-13 |
IE | Insufficient evidence | Insufficient evidence |  | 2015-07-13 |
IND | Indeterminate | Indeterminate | 2.7 | 2015-07-13 |
L | Low | Low | 2.2 | 2015-07-13 |
LL | Critically low | Critically low | 2.1 | 2015-07-13 |
LU | Very low | Very low |  | 2015-07-13 |
MS | Moderately susceptible | Moderately susceptible. Indicates for microbiology susceptibilities only. | 2.1 | 2015-07-13 | mäßig empfindlich
N | Normal | Normal | 2.2 | 2015-07-13 |
ND | Not Detected | Not Detected | 2.7 | 2015-07-13 |
NEG | Negative | Negative | 2.7 | 2015-07-13 |
NR | Non-reactive | Non-reactive | 2.7 | 2015-07-13 |
NS | Non-susceptible | Non-susceptible |  | 2015-07-13 |
OBX | Interpretation qualifiers in separate OBX segments | Interpretation qualifiers in separate OBX segments | 2.8 | 2015-07-13 |
POS | Positive | Positive | 2.7 | 2015-07-13 |
QCF | Quality Control Failure | Quality Control Failure | 2.7 | 2015-07-13 |
R | Resistant | Resistant | 2.1 | 2015-07-13 |
RR | Reactive | Reactive | 2.7 | 2015-07-13 |
S | Susceptible | Susceptible | 2.1 | 2015-07-13 |
SDD | Susceptible | Susceptible-dose dependent |  | 2015-07-13 |
SYN-R | Synergy - resistant | Synergy - resistant |  | 2015-07-13 |
SYN-S | Synergy - susceptible | Synergy - susceptible |  | 2015-07-13 |
TOX | Cytotoxic substance present | Cytotoxic substance present | 2.7 | 2015-07-13 |
U | Significant change up | Significant change up | 2.1 | 2015-07-13 | Deutlicher Trend nach oben
VS | Very susceptible | Very susceptible. Indicates for microbiology susceptibilities only. | 2.1 | 2025-08-02 | Sehr empfindlich
W | Worse | Worse | 2.2 | 2015-07-13 | Verschlechterung
WR | Weakly reactive | Weakly reactive | 2.7 | 2015-07-13 |
null | No range defined, or normal ranges don't apply | No range defined, or normal ranges don't apply | 2.1 | 2015-07-13 | Kein Referenzbereich / Referenzbereich nicht anwendbar