Retrieve active MedicationRequest resources for medication reconciliation

Steps

1. Query active medication requests: GET [base]/MedicationRequest?patient=[id]&status=active; the status parameter accepts a comma-separated list (e.g., active,on-hold) for broader retrieval.
2. Use _include=MedicationRequest:medication to pull referenced Medication resources in the same Bundle when the medication is a reference rather than a CodeableConcept.
3. For each MedicationRequest, extract medicationCodeableConcept.coding (RxNorm codes, system http://www.nlm.nih.gov/research/umls/rxnorm) or resolve the medicationReference to the included Medication resource.
4. Read dosageInstruction[]: each element has text (human-readable), doseAndRate[].doseQuantity, and timing.repeat fields for structured dose frequency.
5. Check dispenseRequest.numberOfRepeatsAllowed and dispenseRequest.validityPeriod to determine refill status and prescription validity.
6. Correlate with MedicationStatement resources if present, as some systems record patient-reported medications there rather than in MedicationRequest.