MedicationRequest

{
  "resourceType" : "MedicationRequest",
  // from Resource: id, meta, implicitRules, and language
  // from DomainResource: text, contained, extension, and modifierExtension
  "identifier" : [{ Identifier }], // External ids for this request
  "status" : "<code>", // R!  active | on-hold | cancelled | completed | entered-in-error | stopped | draft | unknown
  "statusReason" : { CodeableConcept }, // Reason for current status
  "intent" : "<code>", // R!  proposal | plan | order | original-order | reflex-order | filler-order | instance-order | option
  "category" : [{ CodeableConcept }], // Type of medication usage
  "priority" : "<code>", // routine | urgent | asap | stat
  "doNotPerform" : <boolean>, // True if request is prohibiting action
  // reported[x]: Reported rather than primary record. One of these 2:
  "reportedBoolean" : <boolean>,
  "reportedReference" : { Reference(Patient|Practitioner|PractitionerRole|
   RelatedPerson|Organization) },
  // medication[x]: Medication to be taken. One of these 2:
  "medicationCodeableConcept" : { CodeableConcept },
  "medicationReference" : { Reference(Medication) },
  "subject" : { Reference(Patient|Group) }, // R!  Who or group medication request is for
  "encounter" : { Reference(Encounter) }, // Encounter created as part of encounter/admission/stay
  "supportingInformation" : [{ Reference(Any) }], // Information to support ordering of the medication
  "authoredOn" : "<dateTime>", // When request was initially authored
  "requester" : { Reference(Practitioner|PractitionerRole|Organization|
   Patient|RelatedPerson|Device) }, // Who/What requested the Request
  "performer" : { Reference(Practitioner|PractitionerRole|Organization|
   Patient|Device|RelatedPerson|CareTeam) }, // Intended performer of administration
  "performerType" : { CodeableConcept }, // Desired kind of performer of the medication administration
  "recorder" : { Reference(Practitioner|PractitionerRole) }, // Person who entered the request
  "reasonCode" : [{ CodeableConcept }], // Reason or indication for ordering or not ordering the medication
  "reasonReference" : [{ Reference(Condition|Observation) }], // Condition or observation that supports why the prescription is being written
  "instantiatesCanonical" : ["<canonical>"], // Instantiates FHIR protocol or definition
  "instantiatesUri" : ["<uri>"], // Instantiates external protocol or definition
  "basedOn" : [{ Reference(CarePlan|MedicationRequest|ServiceRequest|
   ImmunizationRecommendation) }], // What request fulfills
  "groupIdentifier" : { Identifier }, // Composite request this is part of
  "courseOfTherapyType" : { CodeableConcept }, // Overall pattern of medication administration
  "insurance" : [{ Reference(Coverage|ClaimResponse) }], // Associated insurance coverage
  "note" : [{ Annotation }], // Information about the prescription
  "dosageInstruction" : [{ Dosage }], // How the medication should be taken
  "dispenseRequest" : { // Medication supply authorization
    "initialFill" : { // First fill details
      "quantity" : { Quantity(SimpleQuantity) }, // First fill quantity
      "duration" : { Duration } // First fill duration
    },
    "dispenseInterval" : { Duration }, // Minimum period of time between dispenses
    "validityPeriod" : { Period }, // Time period supply is authorized for
    "numberOfRepeatsAllowed" : "<unsignedInt>", // Number of refills authorized
    "quantity" : { Quantity(SimpleQuantity) }, // Amount of medication to supply per dispense
    "expectedSupplyDuration" : { Duration }, // Number of days supply per dispense
    "performer" : { Reference(Organization) } // Intended dispenser
  },
  "substitution" : { // Any restrictions on medication substitution
    // allowed[x]: Whether substitution is allowed or not. One of these 2:
    "allowedBoolean" : <boolean>,
    "allowedCodeableConcept" : { CodeableConcept },
    "reason" : { CodeableConcept } // Why should (not) substitution be made
  },
  "priorPrescription" : { Reference(MedicationRequest) }, // An order/prescription that is being replaced
  "detectedIssue" : [{ Reference(DetectedIssue) }], // Clinical Issue with action
  "eventHistory" : [{ Reference(Provenance) }] // A list of events of interest in the lifecycle
}