openapi: 3.1.0
info:
  title: Cigna Drug Formulary Bulk Data Coverage API
  description: Public FHIR-based Drug Formulary API exposing Cigna's covered drug lists, formulary tiers, prior authorization, step therapy, and quantity limits. Implements the HL7 Da Vinci PDex US Drug Formulary IG required by the CMS Interoperability and Patient Access rule.
  version: '1.0'
  contact:
    name: Cigna Developer Support
    url: https://developer.cigna.com/support
servers:
- url: https://fhir.cigna.com/DrugFormulary/v1
  description: Cigna Drug Formulary Production
tags:
- name: Coverage
paths:
  /Coverage:
    get:
      operationId: searchCoverage
      summary: Retrieve coverage records for the authenticated member
      tags:
      - Coverage
      parameters:
      - name: patient
        in: query
        schema:
          type: string
      responses:
        '200':
          description: FHIR Bundle of Coverage resources
externalDocs:
  description: Cigna Service APIs
  url: https://developer.cigna.com/docs/service-apis