openapi: 3.1.0
info:
  title: Cigna Drug Formulary Bulk Data Encounter 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: Encounter
paths:
  /Encounter:
    get:
      operationId: searchEncounter
      summary: Retrieve encounter records for the authenticated member
      tags:
      - Encounter
      responses:
        '200':
          description: FHIR Bundle of Encounter resources
externalDocs:
  description: Cigna Service APIs
  url: https://developer.cigna.com/docs/service-apis