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:

Properties

This code system defines the following properties for its concepts

NameCodeURITypeDescription
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:

CodeDisplayDefinitionversionIntroduced
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