MedicationRequest Profile

Canonical	../StructureDefinition/nexus-emr-core-medicationrequest
Status	draft · 1.26.0
Base	MedicationRequest (constraint)
Source	FSH · JSON

Defines the Nexus EMR FHIR profile for MedicationRequest resources, based on CA-Core constraints, for aggregating prescription data from multiple EMRs.

Salient fields

The profile's synthesized-accessor contract: fields TypedFhir surfaces as first-class typed properties, each computed from the instance by a restricted FHIRPath expression. See Salient Fields for what they are, how they shape LLM contexts, and how to declare them.

Key	Type	Expression	Rendered as	Description
medication	string	medicationCodeableConcept.text \| medicationCodeableConcept.coding.first().display \| medicationReference.display		The medication as written, in human-readable form i
status	code	status		Where the prescription is in its lifecycle i
intent	code	intent		proposal | plan | order | instance-order i
dosage	string	dosageInstruction.first().text		Free text dosage instructions (sig)
authored	dateTime	authoredOn		When prescription was written i
reason_code	coded	reasonCode		Reason or indication for ordering or not ordering the medication i
requester	string	requester.display		Who prescribed the medication

medication

Short	The medication as written, in human-readable form
Definition	A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.
Comments	Required.
Expression	medicationCodeableConcept.text | medicationCodeableConcept.coding.first().display | medicationReference.display
Type	string
Prose inherited from	MedicationRequest.medication[x].text

status

Short	Where the prescription is in its lifecycle
Definition	The current state of the medication request. Indicates whether the prescription is active, completed, or cancelled.
Comments	This is a modifier element. Cancelled or stopped prescriptions should not be dispensed.
Expression	status
Type	code
Prose inherited from	MedicationRequest.status

intent

Short	proposal | plan | order | instance-order
Definition	Whether the request is a proposal, plan, or an original order. For prescriptions, this must be 'order'.
Comments	This element distinguishes between different stages of the medication workflow.
Expression	intent
Type	code
Prose inherited from	MedicationRequest.intent

dosage

Short	Free text dosage instructions (sig)
Definition	Complete dosage instructions as they should appear on the prescription label.
Expression	dosageInstruction.first().text
Type	string
Prose inherited from	MedicationRequest.dosageInstruction.text

authored

Short	When prescription was written
Definition	The date and time when the prescription was written or created in the system.
Comments	This represents the prescribing date, not when the medication was dispensed.
Expression	authoredOn
Type	dateTime
Prose inherited from	MedicationRequest.authoredOn

reason_code

Short	Reason or indication for ordering or not ordering the medication
Definition	The reason or the indication for ordering or not ordering the medication.
Comments	This could be a diagnosis code. If a full condition record exists or additional detail is needed, use reasonReference.
Expression	reasonCode
Type	coded
Prose inherited from	MedicationRequest.reasonCode

requester

Short	Who prescribed the medication
Definition	The healthcare provider who prescribed the medication. Should reference a Nexus EMR practitioner.
Expression	requester.display
Type	string
Prose inherited from	MedicationRequest.requester