HL7 v2 Conversion

This guide complements the official HL7 Version 2 to FHIR Implementation Guide.

The HL7 guide currently gives guidance for the conversion of:

  • Patient Administration
    • ADT_A01 - Admit/Visit Notification
    • ADT_A04 - Register a Patient
    • ADT_A08 - Update Patient Information
  • Order Entry
    • OML_O21 - Laboratory order
    • VXU_V04 - Vaccine Record Update
  • Observation Reporting
    • ORU_R01 - Unsolicited Report Alarm

The following principles should be followed for V2 messaging sent outside of an organisation (NHS Trust).

  • Where NHS Number is present in messages, it MUST be traced using either NHS Digitals PDS, SMSP(PDS) or DBS.

  • Consider including trust ODS code as Assigning Authority.

  • Consider including trust ODS code as part of Name of Coding System (CWE)

  • MSH - Sending Facility/Receiving Facility. Use trust ODS Code.

  • MSH - Sending Application should be populated.