HL7 v2.8 Vocabulary
0.1.0 - ci-build

HL7 v2.8 Vocabulary, published by HL7/FO. This guide is not an authorized publication; it is the continuous build for version 0.1.0 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.v28/ and changes regularly. See the Directory of published versions

## CodeSystem: Interpretation Codes (2.8 - 2.1.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/CodeSystem/observationInterpretation | Version: 2.1.0
Active as of 2026-01-27 | Computable Name: ObservationInterpretation
Other Identifiers: OID:2.16.840.1.113883.5.83
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
versionIntroduced | versionIntroduced | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionIntroduced | string | version when was this code introduced
versionDeprecated | 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 | 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 | versionIntroduced | comment | modified | Deutsch (German, de)
< | Below absolute low-off instrument scale | Below absolute low-off instrument scale | 2.1 |  |  | Unter Meßbereich (Extremwertverletzung)
> | Above absolute high-off instrument scale | Above absolute high-off instrument scale | 2.2 |  |  | Über Meßbereich (Extremwertverletzung)
A | Abnormal (applies to non-numeric results) | Abnormal (applies to non-numeric results) | 2.1 |  |  | anormal (nicht numerisch)
AA | Very abnormal | Very abnormal (applies to non-numeric units, analogous to panic limits for numeric units) | 2.1 |  |  | Pathologisch (nicht numerisch)
AC | Anti-complementary substances present | Anti-complementary substances present | 2.7 |  |  |
B | Better | Better (use when direction not relevant) | 2.2 |  | 2025-08-02 | Verbesserung
D | Significant change down | Significant change down | 2.1 |  |  | Deutlicher Trend nach unten
DET | Detected | Detected | 2.7 |  |  |
H | Above high normal | Above high normal | 2.1 |  |  | Oberhalb oberer Grenze Referenzbereich
HH | Above upper panic limits | Above upper panic limits | 2.1 |  |  | Oberhalb oberer pathologischer Grenze
HM | Hold for Medical Review | Hold for Medical Review | 2.8 |  |  |
I | Intermediate | Intermediate. Indicates for microbiology susceptibilities only. | 2.1 |  | 2025-08-02 | Intermediär
IND | Indeterminate | Indeterminate | 2.7 |  |  |
L | Below low normal | Below low normal | 2.2 |  |  | Unterhalb unterer Grenze Referenzbereich
LL | Below lower panic limits | Below lower panic limits | 2.1 |  |  | Unterhalb unterer pathologischer Grenze
MS | Moderately susceptible | Moderately susceptible. Indicates for microbiology susceptibilities only. | 2.1 |  |  | mäßig empfindlich
N | Normal | Normal (applies to non-numeric results) | 2.2 | applies to non-numeric results | 2025-08-02 | Normal (nicht numerisch)
ND | Not Detected | Not Detected | 2.7 |  |  |
NEG | Negative | Negative | 2.7 |  |  |
NR | Non-reactive | Non-reactive | 2.7 |  |  |
OBX | Interpretation qualifiers in separate OBX segments | Interpretation qualifiers in separate OBX segments | 2.8 |  |  |
POS | Positive | Positive | 2.7 |  |  |
QCF | Quality Control Failure | Quality Control Failure | 2.7 |  |  |
R | Resistant | Resistant. Indicates for microbiology susceptibilities only. | 2.1 |  | 2025-08-02 | Resistent
RR | Reactive | Reactive | 2.7 |  |  |
S | Susceptible | Susceptible. Indicates for microbiology susceptibilities only. | 2.1 |  | 2025-08-02 | Empfindlich
TOX | Cytotoxic substance present | Cytotoxic substance present | 2.7 |  |  |
U | Significant change up | Significant change up | 2.1 |  |  | Deutlicher Trend nach oben
VS | Very susceptible | Very susceptible. Indicates for microbiology susceptibilities only. | 2.1 |  | 2025-08-02 | Sehr empfindlich
W | Worse | Worse-use when direction not relevant | 2.2 |  | 2025-08-02 | Verschlechterung
WR | Weakly reactive | Weakly reactive | 2.7 |  |  |
null | No range defined, or normal ranges don't apply | No range defined, or normal ranges don't apply | 2.1 |  |  | Kein Referenzbereich / Referenzbereich nicht anwendbar