The HL7 PID segment is found in every type of
ADT message (i.e. ADT-A01, ADT-A08, etc.) and contains 30 different fields with values ranging from patient ID number, to patient sex, to address, to marital status, to citizenship. The PID segment provides important identification information about the patient and, in fact, is used as the primary means of communicating the identifying and demographic information about a patient between systems. Due to the nature of the information found in the PID segment, it is unlikely to change frequently.
The fields in the PID segment are as follows:
SEQ LEN DT OPT RP/# ELEMENT NAME 1 4 SI O Set ID – Patient ID 2 20 CX O Patient ID (External ID) 3 20 CX R Y Patient ID (Internal ID) 4 20 CX O Y Alternate Patient ID – PID 5 48 XPN R Y Patient Name 6 48 XPN O Mother’s Maiden Name 7 26 TS O Date/Time of Birth 8 1 IS O Sex 9 48 XPN O Y Patient Alias 10 1 IS O Race 11 106 XAD O Y Patient Address 12 4 IS B Country Code 13 40 XTN O Y Phone Number – Home 14 40 XTN O Y Phone Number – Business 15 60 CE O Primary Language 16 1 IS O Marital Status 17 3 IS O Religion 18 20 CX O Patient Account Number 19 16 ST O SSN Number – Patient 20 25 DLN O Driver’s License Number – Patient 21 20 CX O Y Mother’s Identifier 22 3 IS O Ethnic Group 23 60 ST O Birth Place 24 2 ID O Multiple Birth Indicator 25 2 NM O Birth Order 26 4 IS O Y Citizenship 27 60 CE O Veterans Military Status 28 80 CE O Nationality 29 26 TS O Patient Death Date and Time 30 1 ID O Patient Death Indicator
*Note: For the complete HL7 Standard, please go to the HL7 organization website.
HL7 standard allows for several different types of patient identification numbers in the first four fields of the PID segment. The differences are described below:
PID-1: Set ID – Patient ID – a number to identify the transaction PID-2: Patient ID (External ID) – the patient identifier number used by one or more outside institutions (i.e. a physician’s office that is referring the patient) PID-3: Patient ID (Internal ID) – the primary, unique patient identifier number used by the facility PID-4: Alternate Patient ID – an alternate, additional, temporary or pending patient identification number
In HL7 pipe and hat format, the PID segment (shown in red) for an ADT-A01 message would look like this:
MSH|^~&|ADT1|MCM|LABADT|MCM|198808181126|SECURITY|ADT^A01|MSG00001-|P|2.3 EVN|A01|198808181123 PID|||PATID1234^5^M11||JONES^WILLIAM^A^III||19610615|M-||C|1200 N ELM STREET^^GREENSBORO^NC^27401-1020|GL|(91-9)379-1212|(919)271- 3434||S||PATID12345001^2^M10|123456789|9-87654^NC NK1|1|JONES^BARBARA^K|WIFE||||||NK PV1|1|I|2000^2012^01||||004777^LEBAUER^SIDNEY^J.|||SUR||-||ADM|A0- AL1|1||^Penicillin||Produces hives AL1|2||^Cat dander|Respiratory distress
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