Procedure
The Procedure API describes the request or order for a procedure or activity performed with or on a patient. This resource includes a wide range of requests including surgery procedures, diagnostic procedures, therapies, patient care activities, referrals, and consults. This resource does NOT include medication, dietary, and appointment requests.
The Procedure API returns fields including status, Code, Subject, encounter and performed.
Based on:
http://hl7.org/fhir/us/core/StructureDefinition/us-core-procedure