HL7 v2.1 Vocabulary
0.1.0 - ci-build

HL7 v2.1 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.v21/ and changes regularly. See the Directory of published versions

## CodeSystem: Abnormal Flags (2.1 - 1.0.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/CodeSystem/observationInterpretation | Version: 1.0.0
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 | Deutsch (German, de)
< | Below absolute low-off instrument scale | Below absolute low-off instrument scale | 2.1 | Unter Meßbereich (Extremwertverletzung)
A | Abnormal (applies to non-numeric results) | Abnormal (applies to non-numeric results) | 2.1 | pathologisch (nicht numerisch)
AA | Very abnormal | Very abnormal | 2.1 | Extremwert
D | Significant change down | Significant change down | 2.1 | deutlicher Trend nach unten
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
I | Interval | Interval | 2.1 | Schwankend
LL | Below lower panic limits | Below lower panic limits | 2.1 | Unterhalb unterer pathologischer Grenze
MS | Moderately sensitive | Moderately sensitive | 2.1 | mäßig empfindlich
R | Resists | Resists | 2.1 | Resistent
S | Sensitive | Sensitive | 2.1 | Empfindlich
U | Significant change up | Significant change up | 2.1 | Deutlicher Trend nach oben
VS | Very sensitive | Very sensitive | 2.1 | Sehr empfindlich
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