HL7 (Health Level Seven)

HL7 (Health Level Seven) is a set of international standards for transfer of clinical and administrative data between software applications in healthcare.

Every HL7 message is comprised of a collection of segments; each segment starts on a new line and is identified by the first three letters on that line and each segment contains fields and subfields.

Within each segment you’ll find fields (separated by pipes – |) and sub fields (separated by carets – ^).

Ex.

MSH|^~\&|iNTERFACEWARE|Lab|Main HIS|...
EVN||20110213144532||||20110213145902|...
PID|||4525285^^^ADT1||Harrison^Art||...
PV1||E||||||5101^Garland^Mary^F^^DR|||||||||||...
OBX|||WT^WEIGHT||180|pounds|...

 

Video: How does HL7 work?

 

 

What does an HL7 Message look like?

 

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