openapi: 3.1.0
info:
  title: Meditech Expanse FHIR R4 Allergy Patient API
  description: Meditech Expanse FHIR API enables standards-based interoperability for sharing patient data across healthcare systems. Supports TEFCA-aligned data exchange through the Traverse Exchange national network, connecting over 700 facilities across 41 US states. Built on HL7 FHIR R4 standards.
  version: 4.0.0
  contact:
    name: Meditech Support
    url: https://ehr.meditech.com/contact
  license:
    name: Proprietary
    url: https://ehr.meditech.com/privacy-policy
servers:
- url: https://{facility}.meditech.com/fhir/r4
  variables:
    facility:
      default: yourhospital
      description: Your Meditech facility subdomain
security:
- SMART_OAuth2:
  - patient/*.read
  - user/*.read
  - launch
tags:
- name: Patient
  description: US Core Patient resources
paths:
  /Patient:
    get:
      operationId: searchPatients
      summary: Search patients
      description: Search for patient records using FHIR search parameters including name, birthdate, identifier, and gender. Implements US Core Patient profile.
      tags:
      - Patient
      parameters:
      - name: identifier
        in: query
        schema:
          type: string
        description: MRN or other identifier (e.g., identifier=MR|12345)
      - name: family
        in: query
        schema:
          type: string
      - name: given
        in: query
        schema:
          type: string
      - name: birthdate
        in: query
        schema:
          type: string
        description: FHIR date parameter (e.g., birthdate=1980-01-01)
      - name: gender
        in: query
        schema:
          type: string
          enum:
          - male
          - female
          - other
          - unknown
      - name: _count
        in: query
        schema:
          type: integer
          default: 20
          maximum: 200
      - name: _format
        in: query
        schema:
          type: string
          enum:
          - json
          - xml
          default: json
      responses:
        '200':
          description: Bundle of matching Patient resources
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/Bundle'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /Patient/{id}:
    get:
      operationId: getPatient
      summary: Get patient by ID
      description: Retrieve a specific patient resource by FHIR logical ID.
      tags:
      - Patient
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Patient resource
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/Patient'
        '404':
          $ref: '#/components/responses/NotFound'
  /Patient/{id}/$everything:
    get:
      operationId: getPatientEverything
      summary: Get all patient data (Patient $everything)
      description: Returns all resources related to a patient in a single Bundle. Implements the FHIR $everything operation for bulk patient data access.
      tags:
      - Patient
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
      - name: start
        in: query
        schema:
          type: string
          format: date
      - name: end
        in: query
        schema:
          type: string
          format: date
      responses:
        '200':
          description: Bundle containing all patient-linked resources
          content:
            application/fhir+json:
              schema:
                $ref: '#/components/schemas/Bundle'
components:
  schemas:
    Bundle:
      type: object
      description: FHIR Bundle resource
      properties:
        resourceType:
          type: string
          enum:
          - Bundle
        id:
          type: string
        type:
          type: string
          enum:
          - searchset
          - collection
          - transaction
          - batch
          - history
        total:
          type: integer
        link:
          type: array
          items:
            type: object
            properties:
              relation:
                type: string
              url:
                type: string
        entry:
          type: array
          items:
            type: object
            properties:
              fullUrl:
                type: string
              resource:
                type: object
                additionalProperties: true
    OperationOutcome:
      type: object
      properties:
        resourceType:
          type: string
          enum:
          - OperationOutcome
        issue:
          type: array
          items:
            type: object
            properties:
              severity:
                type: string
                enum:
                - fatal
                - error
                - warning
                - information
              code:
                type: string
              diagnostics:
                type: string
    Patient:
      type: object
      description: FHIR R4 Patient resource (US Core Patient Profile)
      properties:
        resourceType:
          type: string
          enum:
          - Patient
        id:
          type: string
        meta:
          type: object
          properties:
            versionId:
              type: string
            lastUpdated:
              type: string
              format: date-time
            profile:
              type: array
              items:
                type: string
        identifier:
          type: array
          items:
            type: object
            properties:
              use:
                type: string
              type:
                type: object
                properties:
                  coding:
                    type: array
                    items:
                      type: object
                      properties:
                        system:
                          type: string
                        code:
                          type: string
              system:
                type: string
              value:
                type: string
        active:
          type: boolean
        name:
          type: array
          items:
            type: object
            properties:
              use:
                type: string
                enum:
                - official
                - usual
                - nickname
                - anonymous
              family:
                type: string
              given:
                type: array
                items:
                  type: string
        telecom:
          type: array
          items:
            type: object
            properties:
              system:
                type: string
                enum:
                - phone
                - fax
                - email
                - pager
                - url
                - sms
              value:
                type: string
              use:
                type: string
                enum:
                - home
                - work
                - temp
                - old
                - mobile
        gender:
          type: string
          enum:
          - male
          - female
          - other
          - unknown
        birthDate:
          type: string
          format: date
        deceasedBoolean:
          type: boolean
        deceasedDateTime:
          type: string
          format: date-time
        address:
          type: array
          items:
            type: object
            properties:
              use:
                type: string
              line:
                type: array
                items:
                  type: string
              city:
                type: string
              state:
                type: string
              postalCode:
                type: string
              country:
                type: string
        communication:
          type: array
          items:
            type: object
            properties:
              language:
                type: object
                properties:
                  coding:
                    type: array
                    items:
                      type: object
                      properties:
                        system:
                          type: string
                        code:
                          type: string
  responses:
    Unauthorized:
      description: SMART on FHIR authorization required
      content:
        application/fhir+json:
          schema:
            $ref: '#/components/schemas/OperationOutcome'
    NotFound:
      description: Resource not found
      content:
        application/fhir+json:
          schema:
            $ref: '#/components/schemas/OperationOutcome'
  securitySchemes:
    SMART_OAuth2:
      type: oauth2
      description: SMART on FHIR OAuth 2.0 authorization
      flows:
        authorizationCode:
          authorizationUrl: https://yourhospital.meditech.com/oauth/authorize
          tokenUrl: https://yourhospital.meditech.com/oauth/token
          scopes:
            patient/*.read: Read access to all patient-owned resources
            user/*.read: Practitioner read access to all resources
            launch: EHR launch context
            openid: OpenID Connect identity
            fhirUser: FHIR user claim
externalDocs:
  description: Meditech Interoperability Documentation
  url: https://ehr.meditech.com/ehr-solutions/meditech-interoperability