Free HL7 v2 to FHIR converter

Paste an HL7 v2 message, get FHIR R4 back. Nothing leaves your browser.

HL7 v2 conversion runs entirely in JavaScript — ADT, results, orders, pharmacy, scheduling, documents, financial, problems and acks. No upload, no server, no logging.

verified_userClient-side only. Your message never leaves this tab.

Inpatient admit with ISO HD identifiers, withdrawn PID ids, next of kin, allergy and a Z-segment. Conversion runs locally as you type.

HL7 v2 in

FHIR R4 out

MessageHeaderMSG00001

ADT^A01^ADT_A01

Provenanceprovenance-2

Patientpatient-3

JANE MARY CITIZEN · 1978-04-12 · 999888

Accountaccount-4

334455 · active

RelatedPersonrelatedperson-5

TOM JAMES CITIZEN · Spouse

Encounterencounter-6

in-progress · inpatient encounter

AllergyIntoleranceallergyintolerance-7

Allergy to penicillin

Conditioncondition-8

Chest pain · 2026-03-15T14:00:00Z

Coveragecoverage-9

Medicare Australia

Observationobservation-10

Body height · 165 cm

Conversion report

ADT^A01^ADT_A01 · HL7 2.5

12segments in

10FHIR resources

0unmapped

Passstructural check

Converted

Resources

Unmapped

Dropped fields

Notes

3 dateTime/instant value(s) had no v2 timezone; emitted as UTC.
Identifier '999888' has no CX.4. Identifier.system taken from MSH-4 ('RIVERLAND HOSPITAL'). A system-less identifier is how two patients become one.
CX.5 MC is an Australian Medicare number. AU Base au-medicarecardnumber fixes system to http://ns.electronichealth.net.au/id/medicare-number. The IG identifier registry has no Australian entries, so this is a documented deviation.
CX.4 'RIVERLAND' is not in the FHIR identifier registry. The IG would send it to Identifier.assigner. We put HD.1 on Identifier.system so the identifier can be matched.
Identifier '777666' has no CX.4. Identifier.system taken from MSH-4 ('RIVERLAND HOSPITAL'). A system-less identifier is how two patients become one.
Identifier '334455' has no CX.4. Identifier.system taken from MSH-4 ('RIVERLAND HOSPITAL'). A system-less identifier is how two patients become one.
Identifier 'MEDICARE' has no CX.4. Identifier.system taken from MSH-4 ('RIVERLAND HOSPITAL'). A system-less identifier is how two patients become one.
PID-2 (External ID) was withdrawn after v2.7; mapped to Patient.identifier.
PID-4 (Alternate Patient ID) was withdrawn after v2.7; mapped to Patient.identifier.
ZPD mapped to Patient.communication and patient-interpreterRequired. Not in any ConceptMap.
Encounter.status in-progress: trigger A01, no PV1-45.

Not for clinical use. Output should be reviewed before production use. No warranty.

Z-segments are the normal case

Humanising Technologies builds custom mappings for exactly this. Tell us what your feed looks like and we will tell you what it takes.