HL7 v2.5.1 Vocabulary
0.1.0 - ci-build

HL7 v2.5.1 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.v251/ and changes regularly. See the Directory of published versions

## CodeSystem: Modality (2.5.1 - 1.0.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/CodeSystem/modality | Version: 1.0.0
Active as of 2026-01-27 | Computable Name: Modality
Other Identifiers: OID:2.16.840.1.113883.18.154
Copyright/Legal: HL7 Inc., 2026

Code system of concepts used to define the imaging apparatus expected to be used to acquire an observation. This table has been removed from the standard as of 2.7 in favor of table 0910. Used in HL7 Version 2.x messaging in the OM1 segment.

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

- Hl7VSmodality

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/modality` defines the following codes:

Code | Display | Definition | versionIntroduced
AS | Angioscopy | Angioscopy | 2.3
BS | Biomagnetic imaging | Biomagnetic imaging | 2.3
CD | Color flow Doppler | Color flow Doppler | 2.3
CP | Colposcopy | Colposcopy | 2.3
CR | Computed radiography | Computed radiography | 2.3
CS | Cystoscopy | Cystoscopy | 2.3
CT | Computed tomography | Computed tomography | 2.3
DD | Duplex Doppler | Duplex Doppler | 2.3
DG | Diapanography | Diapanography | 2.3
DM | Digital microscopy | Digital microscopy | 2.3
EC | Echocardiography | Echocardiography | 2.3
ES | Endoscopy | Endoscopy | 2.3
FA | Fluorescein angiography | Fluorescein angiography | 2.3
FS | Fundoscopy | Fundoscopy | 2.3
LP | Laparoscopy | Laparoscopy | 2.3
LS | Laser surface scan | Laser surface scan | 2.3
MA | Magnetic resonance angiography | Magnetic resonance angiography | 2.3
MS | Magnetic resonance spectroscopy | Magnetic resonance spectroscopy | 2.3
NM | Nuclear Medicine (radioisotope study) | Nuclear Medicine (radioisotope study) | 2.3
OT | Other | Other | 2.3
PT | Positron emission tomography (PET) | Positron emission tomography (PET) | 2.3
RF | Radio fluoroscopy | Radio fluoroscopy | 2.3
ST | Single photon emission computed tomography (SPECT) | Single photon emission computed tomography (SPECT) | 2.3
TG | Thermography | Thermography | 2.3
US | Ultrasound | Ultrasound | 2.3
XA | X-ray Angiography | X-ray Angiography | 2.3