openapi: 3.1.0
info:
  title: Cigna Drug Formulary Bulk Data HealthcareService 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: HealthcareService
paths:
  /HealthcareService:
    get:
      operationId: searchHealthcareService
      summary: Search healthcare services offered by Cigna network providers
      tags:
      - HealthcareService
      responses:
        '200':
          description: FHIR Bundle of HealthcareService resources
externalDocs:
  description: Cigna Service APIs
  url: https://developer.cigna.com/docs/service-apis