generated: '2026-09-07'
method: searched
source: https://www.anthem.com/content/dam/digital/developers-portal/Anthem-IOProviderDirectoryAndFormulary-API-Documentation.pdf
description: >-
  Elevance Health publishes no dated API changelog or release-notes page. The developer portal says
  to "visit our Developer Portal often for the latest API release notes", but no such page is served —
  probed https://www.anthem.com/developers and its sitemap entries, and no release-notes URL exists.
  The only versioned, dated record of change Elevance publishes about its API estate is the
  controlled document that governs the endpoints, so that is what is recorded here.
scheme: controlled-document revision (Document ID IO105, integer major versions)
current_version: '15.0'
entries_are_complete: false
entry_count: 1
entries:
- version: '15.0'
  date: '2025-11-18'
  label: Interoperability API Endpoints (IO105), Effective 2025-11-18, Status Active
  breaking: unknown
  additions:
  - Thirteen brand-specific Patient Access production FHIR base URLs enumerated under totalview.healthos.elevancehealth.com.
  - Provider Directory production endpoint documented with the OAuth 2.0 client-credentials flow and supported search parameters.
  - Formulary production endpoint documented with covered searches for InsurancePlan, Basic (FormularyItem) and MedicationKnowledge (FormularyDrug).
  - CMS-0057 commitments dated 1/1/27 for the Payer-to-Payer, Prior Authorization and Provider Access APIs.
  highlights:
  - Patient Access declared against US Core 6.1.0, CARIN IG for Blue Button STU 2.1.0, FHIR R4 4.0.1 and SMART App Launch 2.2.0.
  - Provider Directory declared against Da Vinci PDEX Plan Net 1.1.0 and US Core STU 3.1.1.
  - Formulary declared against Da Vinci PDEX US Drug Formulary IG 2.0.1 STU2.
notes:
- >-
  Prior revisions of IO105 (v1.0 through v14.0) are referenced by the version number but are not
  published; only the current revision is downloadable. A consumer cannot diff what changed.
- >-
  The FHIR CapabilityStatements are themselves dated and regenerate on request, so they record the
  current state of the contract but not its history. The Patient360 DSTU2 conformance statement is
  frozen at 2024-10-25.