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CCOW Patient Identity Subjects

Patient Identity Subjects

The patient Identity subject is an identity subject that identifies a patient.

Patient subjects have the following attributes:

Subject Label “Patient”
Subject type Identity
Synchronization Constant
Security None
Subject Dependencies None
Mapping Agent Coupon Value -1


A patient can be identified using different identifiers by different applications at a site. For example, different applications may use application-specific medical record numbers to identify the same patient. Site-defined suffixes of subject identifier items identify the patient in different applications. A Patient-Link-enabled application should be configurable to use the appropriate suffix (or suffixes) when getting or setting context data.


Patient subjects have the following standard context data items. A Patient Linked application should set the value for at least one of the items listed in the following table:

Patient Subject Identifier Item Name Meaning Data Type Semantic Constraints on Values Case Sensitivity
Patient.Id.MRN.Suffix Patient’s medical record number, per PID-2 ST HL7 Table 0203 Identifier Type = MR No
Patient.Id.MPI Patient’s identifier in the “Master Patient Index”, per PID-2 ST HL7 Table 0203 Identifier Type = PT or PI (as agreed upon by context sharing systems) and Assigning Authority represents the MPI system No
Patient.Id.NationalIdNumber Patient’s national identifier number, per PID-2 ST HL7 Table 0203 Identifier Type = PT and Assigning Authority represents agreed upon National Authority No
Patient.Id.IdList A list of patient identifiers for a patient, per PID-3 CX May be a repeating set of CX item values, each of which contains one identifier that denotes the same patient (Driver’s license and social security number may be among these identifiers) No


An application can optionally set values for the corroborating items listed in the following table:

Patient Subject Corroborating Item Name Meaning Data Type Semantic Constraints on Values Case Sensitivity
Patient.Co.PatientName Patient’s legal name, per PID-5 XPN Table 0200 No
Patient.Co.AliasName Alias name for the patient, per PID-9 XPN Table 0200 No
Patient.Co.DateTimeOfBirth Patient’s Date and time of birth, per PID-7 TS None No
Patient.Co.Sex Patient’s gender, per PID-8 IS Table 0001 No
Patient.Co.DLN Patient’s driver’s license number, per PID-20 DLN None No
Patient.Co.SSN Patient’s Social Security Number, per PID-19 ST None No


Examples of Patient Subject Items are listed in the following table:

Example Item Names Example Item Values
Patient.Id.MPI 001KM002130-JJXXX-98
Patient.Id.MRN.St_Elsewhere_Clinic SEC-KMAR-00hjd7792
Patient.Id.MRN.St_Somewhere_Clinic SSC-KMAR-00WSB887455
Patient.Co.DateTimeOfBirth 19580317
Patient.Co.PatientName Jason^King^^^^
Patient.Id.IdList.1 001KM002130-JJXXX-98^^^^PI^^^
Patient.Id.IdList.2 SEC-KMAR-00hjd7792^^^St_Elsewhere_Clinic&&^MR^^^
Patient.Id.IdList.3 SSC-KMAR-00WSB887455^^^St_Somewhere_Clinic&&^MR^^^