The PID segment is used by all applications as the primary means of communicating patient identification information. This segment contains permanent patient identifying and demographic information that, for the most part, is not likely to change frequently.

It should be noted that from V2.4 onwards the demographics of animals can also be sent in the PID segment (see PID-35 to PID-38).

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C.LenElementv2.6FHIR
11..4-SIO1-00104PID-1Set ID - PIDMin Length-
2---W1-00105PID-2Patient ID24 mappings
3--CXR*-00106PID-3Patient Identifier ListLength4 mappings
4---W1-00107PID-4Alternate Patient ID - PID34 mappings
5--XPNR*020000108PID-5Patient NameLengthname[1]
6--XPNO*-00109PID-6Mother's Maiden NameLength2 mappings
7--DTMO1-00110PID-7Date/Time of BirthLength3 mappings
8--CWEO1000100111PID-8Administrative Sex2gender
9---W1-00112PID-9Patient Alias3name[2]
10--CWEO*000500113PID-10RaceLength-
11--XADO*-00114PID-11Patient AddressLengthaddress[1]
12---W1-00115PID-12County Code34 mappings
13--XTNB*-00116PID-13Phone Number - Home22 mappings
14--XTNB*-00117PID-14Phone Number - Business22 mappings
15--CWEO1029600118PID-15Primary LanguageLengthcommunication.language
16--CWEO1000200119PID-16Marital StatusLengthmaritalStatus
17--CWEO1000600120PID-17ReligionLength2 mappings
18--CXO1006100121PID-18Patient Account Number2identifier
19---W1-00122PID-19SSN Number - Patient25 mappings
20---W1-00123PID-20Driver's License Number - Patient2identifier[5]
21--CXO*006100124PID-21Mother's Identifier2$this
22--CWEO*018900125PID-22Ethnic GroupLength-
23-250#STO1-00126PID-23Birth Place22 mappings
241-IDO1013600127PID-24Multiple Birth IndicatorMin LengthmultipleBirthBoolean
25-2=NMO1-00128PID-25Birth Order2multipleBirthInteger
26--CWEO*017100129PID-26CitizenshipLength3 mappings
27--CWEO1017200130PID-27Veterans Military StatusLength-
28--CWEW1021200739PID-28NationalityOptionality3 mappings
29--DTMO1-00740PID-29Patient Death Date and TimeLengthdeceasedDateTime
301-IDO1013600741PID-30Patient Death IndicatorMin LengthdeceasedBoolean
311-IDO1013601535PID-31Identity Unknown IndicatorMin Length-
32--CWEO*044501536PID-32Identity Reliability Code2-
33--DTMO1-01537PID-33Last Update Date/TimeLengthoccurredDateTime
34--HDO1-01538PID-34Last Update FacilityLength3 mappings
35--CWEC1044601539PID-35Species CodeLength3 mappings
36--CWEC1044701540PID-36Breed CodeLength3 mappings
37-80=STO1-01541PID-37Strain2-
38--CWEO2042901542PID-38Production Class CodeLength-
39--CWEO*017101840PID-39Tribal CitizenshipLength3 mappings
40--XTNO*-02289PID-40Patient Telecommunication InformationNEWtelecom[3]
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