https://www.hl7.org/fhir/DSTU2/procedure.html Procedure API retrieves the details of procedures performed on or with a patient as part of the provision of care. Examples include: surgical procedures, diagnostic procedures, endoscopic procedures, biopsies, counseling, physiotherapy, exercise, etc. Procedures may be performed by a healthcare professional, a friend or relative, or sometimes by the patient. Responses to this controller can be narrowed using date ranges based on the episode start date. NOTE: The number of records returned is limited to a maximum of 500.