Optum Interoperability APIs (CMS Patient Access)

name: Optum Interoperability APIs (CMS Patient Access)
description: Optum's payer-side CMS Interoperability and Patient Access (CMS-9115-F) surface — Patient
  Access, Provider Directory and Payer-to-Payer exchange for the Optum behavioral and physical health
  plans. The former developer.optum.com/dataaccessandinteroperability ReadMe project no longer resolves
  (every path returned the portal shell when probed on 2026-08-14); the developer information is now published
  as per-plan PDF packets on optum.com, so there is no machine-readable contract for this surface.
humanURL: https://www.optum.com/en/interoperability-apis.html
baseURL: https://apigw.optum.com/
tags:
- FHIR
- Patient Access
- Interoperability
- CMS
- Provider Directory
properties:
- type: Documentation
  url: https://www.optum.com/en/interoperability-apis.html