The HL7 standards defines so many data elements. No way to know it all by heart. The standard defines so many different HL7 versions, message types (trigger events), segments and tables… Caristix provides a free reference dictionary to all of these elements.
Not sure what are the MSH fields in HL7 v2.5.1?
Look at the Caristix HL7 Definition.
Caristix Pinpoint makes it easy to:
Kick start your integration project now.