HL7 & FHIR Validation Errors
Paste an error you are seeing into search, land here. Every page below documents one concrete validation error our engine emits: what it means, why it happens, and how to fix it, with a realistic broken example and the corrected version. The errors are grouped by the standard they come from.
HL7v2 errors
Structural, segment, field, datatype, and cross-field errors raised when validating HL7 version 2.x pipe-delimited messages.
FHIR errors
Errors from base FHIR R4 validation and from conformance against profiles such as US Core and IPS: missing elements, bad codes, reference shape, and value-set bindings.
FHIRPath errors
Parse and evaluation errors from FHIRPath expressions: unexpected tokens, unterminated strings, unknown functions, and bad arguments.
Validate your own message
Rather than match an error by eye, paste your message or resource into the relevant tool and get every issue at once, with the exact location and a suggested fix.
40 documented errors and counting.