Healthcare interoperability begins with patient identification. The PIX Integration Profile is defined to resolve a patient identifier from one local domain to other connected systems. OHF currently supports:

• ITI-8: Patient Identity Feed Transaction
• ITI-9: PIX Query Transaction

Patient Identity Source
Supports the Patient Identity Feed (ITI-8) Transaction which handles the admission, registration, pre-admission, update, and merge of patients in a local domain.

Patient Identifier Cross-Reference Consumer
Supports the PIX Query (ITI-9) Transaction which queries for a list of patient identifiers across systems using the known local patient identifier.

Should I query for a patient using PIX or PDQ?

At the IHE Connectathon it is common for a vendor to implement either the Patient Identifier Cross-Reference Consumer (PIX) or Patient Demographics Consumer (PDQ), but not both - though it is not prohibited. In choosing which query to implement, ask what information the system will have about the patient. If the system has a local ID that has been registered with the PIX registry, use PIX. If your system has only demographic data, use PDQ.

• IHE
• OHF Wiki
• PIX Source Documentation
• PIX Consumer Documentation