Application Name: Reference Application
Version Number: 2.1.4
Question: I’m currently using the FHIR module add-on and whenever I try to use the Observation endpoint with the subject parameter using the patient ID as the value, I always get an empty result. I want to ask what patient ID the documentation is referring to. Thanks!
Have you tried the patient’s UUID? Internal IDs (e.g., patient.id) should never be exposed by web services, since they are not guaranteed to be unique or permanent.