How do i search Practitioners in a department/organization e.g prov,dep,gov on FHIR server. i want to display only practitioners from a particular organization.
Tried this "GET [base]/Practitioner?Organization=Organization/{_id}" and did not return any results.
You can only search a resource based on information in that resource, and more specifically, using search parameters defined for the resource. Practitioner doesn't capture any information about 'organization' and doesn't have a search parameter called "Organization". (Side point - search parameter names are almost always lower-case.)
Practitioner represents a professional independent of who they work for or what role they're acting in. The PractitionerRole resource is what you need. It represents the combination of "who?" (practitioner), "on-behalf-of whom?" (organization), and "wearing which hat?" (code). Not all aspects will be present/relevant in all instances, but in your case you'd have both organization and practitioner.