Cigna

Cigna MedicationKnowledge API

The MedicationKnowledge API from Cigna — 1 operation(s) for medicationknowledge.

Documentation GitHub OpenAPI

Operations 1

GET /MedicationKnowledge Search covered drugs and formulary tier, step therapy, and prior auth #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/cigna-medicationknowledge-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: Cigna Drug Formulary Bulk Data Medication Knowledge 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: MedicationKnowledge
paths:
  /MedicationKnowledge:
    get:
      operationId: searchMedicationKnowledge
      summary: Search covered drugs and formulary tier, step therapy, and prior auth
      tags:
      - MedicationKnowledge
      parameters:
      - name: code
        in: query
        schema:
          type: string
        description: RxNorm or NDC code
      - name: DrugPlan
        in: query
        schema:
          type: string
        description: InsurancePlan id of the formulary
      responses:
        '200':
          description: FHIR Bundle of MedicationKnowledge resources
externalDocs:
  description: Cigna Service APIs
  url: https://developer.cigna.com/docs/service-apis