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Patient Identifier List
| Field | Length | Data Type | Optionality | Repeatability (No (-) or Unlimited (∞)) | Table (Additional Values) |
| PID.3.1 - ID Number | 15 | ST | R | - | |
| PID.3.2 - Check Digit | 1 | ST | O | - | |
| PID.3.3 - Check Digit Scheme | 3 | ID | O | - | 0061 |
| PID.3.4 - Assigning Authority | 227 | HD | O | - | 0363 |
| PID.3.5 - Identifier Type Code | 5 | ID | O | - | 0203 |
| PID.3.6 - Assigning Facility | 227 | HD | O | - | |
| PID.3.7 - Effective Date | 8 | DT | O | - | |
| PID.3.8 - Expiration Date | 8 | DT | O | - | |
| PID.3.9 - Assigning Jurisdiction | 705 | CWE | O | - | |
| PID.3.10 - Assigning Agency or Department | 705 | CWE | O | - |
In V2, the key information for each patient identifier uses the following fields:
PID-3.1 - Id Number ST
PID-3.4 - Assigning Authority HD (This is how you know who this ID belongs to.)
The HD data type includes these fields:
| Field | Length | Data Type | Optionality | Repeatability (No (-) or Unlimited (∞)) | Table (Additional Values) |
| HD.1 - Namespace Id | 20 | IS | O | - | 0300 |
| HD.2 - Universal Id | 199 | ST | C | - | |
| HD.3 - Universal Id Type | 6 | ID | C | - | 0301 |
HL7 CDA
In CDA, the Patient demographic information is in the RecordTarget structure of the document’s header area. Patient identifiers are recorded within recordTarget.patientRole.id. The sdtc:identifiedBy extension to hold the identifier type.
<patientRole> <id extension="d580858d0d83427381cd9d2237580048" root="2.16.840.1.113883.15.15.500.1"/> <id assigningAuthorityName="Social Security Administration" extension="123-45-9999" root="2.16.840.1.113883.4.1"/> <sdtc:identifiedBy typeCode="REL"> <sdtc:alternateIdentification classCode="IDENT"> <sdtc:id extension="123-45-9999" root="2.16.840.1.113883.4.1"/> <sdtc:code> <originalText>Social Security Number</originalText> </sdtc:code> </sdtc:alternateIdentification> </sdtc:identifiedBy> <sdtc:identifiedBy typeCode="REL"> <sdtc:alternateIdentification classCode="IDENT"> <sdtc:id extension="d580858d0d83427381cd9d2237580048" root="2.16.840.1.113883.15.15.500.1"/> <sdtc:code> <originalText>A|D Vault Exchange Master Patient Identifier</originalText> </sdtc:code> </sdtc:alternateIdentification> </sdtc:identifiedBy> . . . </patientRole> </recordTarget> |
HL7 FHIR
In FHIR you use the Patient Resource to represent patient information. Patient.identifier holds the patient ids.
The Patient Example in US Core FHIR IG includes this example of a patient identifier holding the patient’s medical record number at an organization which defines its MRNs in a naming system called “http://example.org/patient/identifiers”.
Example FHIR Patient.identifier entry representing a Medical Record Number (MRN) using the v2-0203 identifier type code system. |