openapi: 3.1.0
info:
  title: Cigna Drug Formulary Bulk Data InsurancePlan 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: InsurancePlan
paths:
  /metadata:
    get:
      operationId: getCapabilityStatement
      summary: Retrieve the FHIR capability statement
      tags:
      - InsurancePlan
      responses:
        '200':
          description: FHIR CapabilityStatement
  /InsurancePlan:
    get:
      operationId: searchFormularyPlan
      summary: List drug formulary plans offered by Cigna
      tags:
      - InsurancePlan
      parameters:
      - name: status
        in: query
        schema:
          type: string
      responses:
        '200':
          description: FHIR Bundle of InsurancePlan formulary resources
externalDocs:
  description: Cigna Service APIs
  url: https://developer.cigna.com/docs/service-apis