The MSH segment defines the intent, source, destination, and some specifics of the syntax of a message.

FIELD NOTES: MSH MESSAGE HEADER

14
C.LenElementFHIR
1..1-STR1-00005MSH-1FIELD SEPARATOR-
2..4-STR1-00509MSH-2ENCODING CHARACTERS-
3..15-STO1-00006MSH-3SENDING APPLICATION4 mappings
4..20-STO1-00512MSH-4SENDING FACILITY5 mappings
5..15-STO1-00009MSH-5RECEIVING APPLICATION3 mappings
6..30-STO1-00513MSH-6RECEIVING FACILITYdestination[1].receiver(Organization)
7..19-TSO1-00010MSH-7DATE/TIME OF MESSAGE3 mappings
8..40-STO1-00008MSH-8Securitymeta.security
9..7-IDR1007600012MSH-9MESSAGE TYPE3 mappings
10..20-STR1-00013MSH-10MESSAGE CONTROL ID2 mappings
11..1-IDR1010300014MSH-11PROCESSING IDmeta
12..8-NMR1010400015MSH-12VERSION ID-
13..15-NMO1-00633MSH-13SEQUENCE NUMBER-
14..180-STO1-00699MSH-14CONTINUATION POINTER-
69