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: Causality Observations (2.8 - 1.0.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/CodeSystem/causalityObservations | Version: 1.0.0
Active as of 2026-01-27 | Computable Name: CausalityObservations
Other Identifiers: OID:2.16.840.1.113883.18.147
Copyright/Legal: HL7 Inc., 2026

HL7-defined code system of concepts used to record event observations regarding what may have caused a product related event. Used in HL7 Version 2.x messaging in the PCR segment.

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

- Hl7VScausalityObservations

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/causalityObservations` defines the following codes:

Code | Display | Definition | versionIntroduced
AW | Abatement of event after product withdrawn | Abatement of event after product withdrawn | 2.3
BE | Event recurred after product reintroduced | Event recurred after product reintroduced | 2.3
DR | Dose response observed | Dose response observed | 2.3
EX | Alternative explanations for the event available | Alternative explanations for the event available | 2.3
IN | Event occurred after product introduced | Event occurred after product introduced | 2.3
LI | Literature reports association of product with event | Literature reports association of product with event | 2.3
OE | Occurrence of event was confirmed by objective evidence | Occurrence of event was confirmed by objective evidence | 2.3
OT | Other | Other | 2.3
PL | Effect observed when patient receives placebo | Effect observed when patient receives placebo | 2.3
SE | Similar events in past for this patient | Similar events in past for this patient | 2.3
TC | Toxic levels of product documented in blood or body fluids | Toxic levels of product documented in blood or body fluids | 2.3