HL7 Terminology (THO)
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CodeSystem: causalityObservations

Official URL: http://terminology.hl7.org/CodeSystem/v2-0252 Version: 2.0.0
Active as of 2019-12-01 Responsible: Health Level Seven International Computable Name: CausalityObservations
Other Identifiers: urn:ietf:rfc:3986#Uniform Resource Identifier (URI)#urn:oid:2.16.840.1.113883.18.147

Copyright/Legal: This material derives from the HL7 Terminology (THO). THO is copyright ©1989+ Health Level Seven International and is made available under the CC0 designation. For more licensing information see: https://terminology.hl7.org/license

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.

Underlying Master Code System for V2 table 0252 (Causality Observations)

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


This code system defines the following properties for its concepts

statushttp://terminology.hl7.org/CodeSystem/utg-concept-properties#statuscodeStatus of the concept
deprecatedhttp://terminology.hl7.org/CodeSystem/utg-concept-properties#v2-table-deprecatedcodeVersion of HL7 in which the code was deprecated


This case-sensitive code system http://terminology.hl7.org/CodeSystem/v2-0252 defines the following codes in a Is-A heirarchy:

AW Abatement of event after product withdrawnAbatement of event after product withdrawn
BE Event recurred after product reintroducedEvent recurred after product reintroduced
LI Literature reports association of product with eventLiterature reports association of product with event
IN Event occurred after product introducedEvent occurred after product introduced
EX Alternative explanations for the event availableAlternative explanations for the event available
PL Effect observed when patient receives placeboEffect observed when patient receives placebo
TC Toxic levels of product documented in blood or body fluidsToxic levels of product documented in blood or body fluids
DR Dose response observedDose response observed
SE Similar events in past for this patientSimilar events in past for this patient
OE Occurrence of event was confirmed by objective evidenceOccurrence of event was confirmed by objective evidence
OT OtherOther


2023-11-14reviseMarc DuteauTSMGAdd standard copyright and contact to internal content; up-476
2020-05-06reviseTed KleinVocabulary WGMigrated to the UTG maintenance environment and publishing tooling.