HL7 2.3.1 - Identifier Type Codeset - HL7 0203

# HL7 Version CodeValue Description
 1 2.3.1 BR Birth registry number
 2 2.3.1 MA Medicaid number
 3 2.3.1 MC Medicare number
 4 2.3.1 MR Medical record number
 5 2.3.1 SR State registry ID
 6 2.3.1 SS Social Security number