HL7 Version 2.x

1. Message structure

   Segments, fields, components, subcomponents, repetition and the default delimiters |^~\&.

2. MSH and acknowledgments

   MSH header fields, message type and trigger event, ACK and NACK, and the HL7 v2 code tables.

3. ADT patient administration

   ADT events (A01, A03, A04, A08) with PID, PV1 and EVN segments.

4. Orders and results

   ORM/OML orders and ORU result messages with OBR and OBX segments.

5. MLLP transport

   Minimal Lower Layer Protocol framing with start and end block characters.

6. v2 to FHIR mapping

   Segment, datatype and message mapping from v2 to FHIR resources.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.

• Da Vinci Prior Authorization Support (PAS)
• DICOM
• FHIR Bulk Data Access
• HL7 Da Vinci Project Implementation Guides
• HL7 FHIR R4
• HL7 FHIR R5
• Medicare and Medicaid Claims Data (CMS data dictionaries)
• NCPDP SCRIPT
• NCPDP Telecommunication Standard
• OMOP Common Data Model
• Price Transparency (Transparency in Coverage)
• SMART on FHIR (App Launch)