Oracle Health (Cerner)

Cerner (Oracle Health) Definitions API

FHIR conformance definitions and operations.

Documentation GitHub OpenAPI

Operations 2

GET /OperationDefinition Search OperationDefinition #

GET /StructureDefinition Search StructureDefinition #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Oracle Health Millennium Platform FHIR R4 Capability Definitions 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/
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
security:
- oauth2: []
tags:
- name: Definitions
  description: FHIR conformance definitions and operations.
paths:
  /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'
components:
  schemas:
    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
  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.
externalDocs:
  description: Oracle Health Millennium FHIR R4 Documentation
  url: https://docs.oracle.com/en/industries/health/millennium-platform-apis/mfrap/r4_overview.html
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