openapi: 3.1.0
info:
  title: Oracle Health Millennium Platform FHIR R4 API
  description: >-
    The Oracle Health (Cerner Millennium) FHIR R4 API provides
    OAuth 2.0-secured access to EHR data in the HL7 FHIR R4 format. It
    exposes USCDI-aligned resources such as Patient, Practitioner,
    Observation, Condition, MedicationRequest, DocumentReference, and
    Encounter for patient-access apps, provider apps, and interoperability
    partners. The API supports SMART on FHIR app launching and is the
    successor to the Cerner Millennium DSTU2 FHIR API.
  version: 'R4'
  contact:
    name: Oracle Health Developer Program
    url: https://www.oracle.com/health/developer/
externalDocs:
  description: Oracle Health Millennium FHIR R4 Documentation
  url: https://docs.oracle.com/en/industries/health/millennium-platform-apis/mfrap/r4_overview.html
servers:
- url: https://fhir-ehr.cerner.com/r4
  description: Cerner Millennium FHIR R4 production endpoint
- url: https://fhir-open.cerner.com/r4
  description: Cerner Millennium FHIR R4 sandbox endpoint
tags:
- name: Capability
  description: FHIR server metadata and capability statements.
- name: Patient
  description: Patient demographics and identifiers.
- name: Encounter
  description: Patient encounter records.
- name: Condition
  description: Patient conditions and problem-list entries.
- name: Procedure
  description: Patient procedures.
- name: Definitions
  description: FHIR conformance definitions and operations.
- name: Generic
  description: Generic FHIR resource read/write operations.
security:
- oauth2: []
paths:
  /metadata:
    get:
      operationId: getCapabilityStatement
      summary: Get Capability Statement
      description: Returns the FHIR CapabilityStatement describing supported resources and operations.
      tags:
      - Capability
      security: []
      responses:
        '200':
          description: Capability statement
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/FHIRResource'
  /CapabilityStatement:
    get:
      operationId: readCapabilityStatement
      summary: Read CapabilityStatement
      description: Returns the CapabilityStatement resource for the FHIR server.
      tags:
      - Capability
      security: []
      responses:
        '200':
          description: CapabilityStatement resource
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/FHIRResource'
  /Condition:
    get:
      operationId: searchCondition
      summary: Search or Read Condition
      description: Search or read Condition resources for a patient.
      tags:
      - Condition
      parameters:
      - name: patient
        in: query
        description: Patient resource reference.
        schema:
          type: string
      responses:
        '200':
          description: A FHIR Bundle of Condition resources
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/FHIRBundle'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /Encounter:
    get:
      operationId: searchEncounter
      summary: Search or Read Encounter
      description: Search or read Encounter resources for a patient.
      tags:
      - Encounter
      parameters:
      - name: patient
        in: query
        description: Patient resource reference.
        schema:
          type: string
      responses:
        '200':
          description: A FHIR Bundle of Encounter resources
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/FHIRBundle'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /Patient:
    get:
      operationId: searchPatient
      summary: Search or Read Patient
      description: Search or read Patient resources.
      tags:
      - Patient
      parameters:
      - name: identifier
        in: query
        description: Patient identifier.
        schema:
          type: string
      - name: name
        in: query
        description: Patient name.
        schema:
          type: string
      responses:
        '200':
          description: A FHIR Bundle of Patient resources
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/FHIRBundle'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /Procedure:
    get:
      operationId: searchProcedure
      summary: Search or Read Procedure
      description: Search or read Procedure resources for a patient.
      tags:
      - Procedure
      parameters:
      - name: patient
        in: query
        description: Patient resource reference.
        schema:
          type: string
      responses:
        '200':
          description: A FHIR Bundle of Procedure resources
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/FHIRBundle'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /OperationDefinition:
    get:
      operationId: searchOperationDefinition
      summary: Search OperationDefinition
      description: Returns OperationDefinition resources defined for the server.
      tags:
      - Definitions
      security: []
      responses:
        '200':
          description: A FHIR Bundle of OperationDefinition resources
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/FHIRBundle'
  /StructureDefinition:
    get:
      operationId: searchStructureDefinition
      summary: Search StructureDefinition
      description: Returns StructureDefinition resources defined for the server.
      tags:
      - Definitions
      security: []
      responses:
        '200':
          description: A FHIR Bundle of StructureDefinition resources
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/FHIRBundle'
  /{resource}:
    post:
      operationId: createResource
      summary: Create FHIR Resource
      description: Creates a new instance of the named FHIR resource type.
      tags:
      - Generic
      parameters:
      - name: resource
        in: path
        required: true
        description: The FHIR resource type (e.g., Observation, Condition).
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/fhir+json:
            schema:
              $ref: '#/components/schemas/FHIRResource'
      responses:
        '201':
          description: Resource created
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/FHIRResource'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /{resource}/{id}:
    put:
      operationId: updateResource
      summary: Update FHIR Resource
      description: Updates an existing FHIR resource by ID.
      tags:
      - Generic
      parameters:
      - name: resource
        in: path
        required: true
        description: The FHIR resource type.
        schema:
          type: string
      - name: id
        in: path
        required: true
        description: The FHIR resource ID.
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/fhir+json:
            schema:
              $ref: '#/components/schemas/FHIRResource'
      responses:
        '200':
          description: Resource updated
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/FHIRResource'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: patchResource
      summary: Patch FHIR Resource
      description: Partially updates an existing FHIR resource by ID.
      tags:
      - Generic
      parameters:
      - name: resource
        in: path
        required: true
        description: The FHIR resource type.
        schema:
          type: string
      - name: id
        in: path
        required: true
        description: The FHIR resource ID.
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json-patch+json:
            schema:
              $ref: '#/components/schemas/FHIRResource'
      responses:
        '200':
          description: Resource patched
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/FHIRResource'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  securitySchemes:
    oauth2:
      type: oauth2
      description: >-
        SMART on FHIR OAuth 2.0 with patient, user, and system scopes.
      flows:
        authorizationCode:
          authorizationUrl: https://authorization.cerner.com/tenants/{tenant}/protocols/oauth2/profiles/smart-v1/personas/patient/authorize
          tokenUrl: https://authorization.cerner.com/tenants/{tenant}/protocols/oauth2/profiles/smart-v1/token
          scopes:
            patient/*.read: Read all patient-scoped resources.
            user/*.read: Read all user-scoped resources.
            system/*.read: System-level read access.
        clientCredentials:
          tokenUrl: https://authorization.cerner.com/tenants/{tenant}/protocols/oauth2/profiles/smart-v1/token
          scopes:
            system/*.read: System-level read access.
            system/*.write: System-level write access.
  responses:
    Unauthorized:
      description: Authentication credentials are missing or invalid.
      content:
        application/fhir+json:
          schema:
            $ref: '#/components/schemas/FHIRResource'
    NotFound:
      description: The requested resource was not found.
      content:
        application/fhir+json:
          schema:
            $ref: '#/components/schemas/FHIRResource'
  schemas:
    FHIRResource:
      type: object
      description: A generic FHIR R4 resource.
      properties:
        resourceType:
          type: string
        id:
          type: string
      additionalProperties: true
    FHIRBundle:
      type: object
      description: A FHIR R4 Bundle resource wrapping a collection of resources.
      properties:
        resourceType:
          type: string
          const: Bundle
        type:
          type: string
        total:
          type: integer
        entry:
          type: array
          items:
            type: object
            additionalProperties: true
      additionalProperties: true
x-generated-from: https://docs.oracle.com/en/industries/health/millennium-platform-apis/mfrap/r4_overview.html
x-generated-by: claude-crawl-2026-05-08