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HL7 V2 | REFERENCE

HL7 v2 reference

Free reference pages for HL7 version 2: code tables and trigger events, with FHIR mappings where HL7 publishes them. Built from HL7's openly licensed terminology, and linked to PipeHat so you can see each code in a real message.

Code tables

421 tables with codes and meanings: patient class, administrative sex, identifier types and more. FHIR equivalents and where each table is used.

Trigger events

All 384 events: ADT A01–A62, ORU R01, ORM O01, SIU S12 and more, with message structures and, for common ones, FHIR mappings.

Source: HL7 Terminology (THO) 7.4.0 and the HL7 v2-to-FHIR Implementation Guide 1.0.0, published by HL7 International under CC0. Check your trading partner's specification for the values they actually send.