generated: '2026-08-15'
method: searched
source: https://bcda.cms.gov/announcements.html
scheme: dated announcements per API programme (no single CMS-wide changelog)
note: >-
  CMS publishes no unified API changelog. BCDA is the only API family with a dated, structured
  announcements feed; it is captured below. AB2D, DPC, the Marketplace API and the Provider Data
  Catalog announce changes through Google Groups and email rather than a published page —
  https://bluebutton.cms.gov/developers/api-changelog/ and https://dpc.cms.gov/api-changelog both
  return 404. Recent window only; see the source URL for the full list.
changelogs:
  - api: CMS Beneficiary Claims Data API (BCDA)
    url: https://bcda.cms.gov/announcements.html
    format: html
    feed: null
current_version:
  BCDA: v3
  AB2D: v3
  Blue Button: v2
  DPC: v1
entries:
  - date: '2026-07-01'
    api: BCDA
    title: 'BCDA v3: Enhanced timeliness and performance for value-based care'
    type: release
    breaking: false
    highlights:
      - Core improvements to data sources and alignment for timelier, more person-centered care.
    url: https://bcda.cms.gov/announcements.html
  - date: '2026-06-15'
    api: BCDA
    title: BCDA v3 goes live July 1, 2026
    type: announcement
    breaking: true
    highlights:
      - v3 brings advances in timeliness and performance for value-based care.
      - Starts the v1/v2 retirement clock — access to v1 and v2 is removed on 2027-07-30.
      - Adds the _typeFilter parameter and consolidates partially adjudicated claims resources.
    url: https://bcda.cms.gov/v3/welcome-v3
  - date: '2026-02-12'
    api: BCDA
    title: End of BCDA data limitations
    type: availability
    breaking: false
    highlights:
      - Performance year 2026 data became accessible after the annual January transition.
  - date: '2025-12-03'
    api: BCDA
    title: BCDA data limited in Jan 2026 for yearly updates
    type: availability
    breaking: false
    highlights:
      - Claims with 2026 service dates unavailable throughout January 2026.
  - date: '2025-09-17'
    api: BCDA
    title: Open call for BCDA v3 pilot program
    type: announcement
    breaking: false
  - date: '2025-08-05'
    api: BCDA
    title: 'Post Connectathon, there''s still time to test v3'
    type: announcement
    breaking: false
    highlights:
      - v3 demo endpoints kept open in the sandbox after the June 2025 HL7 FHIR Connectathon.
  - date: '2025-08-04'
    api: BCDA
    title: What's new on BCDA.cms.gov
    type: docs
    breaking: false
    highlights:
      - New BCDA developer site launched from user research and testing.
  - date: '2025-07-09'
    api: BCDA
    title: Try the API at the 2025 HL7 FHIR Connectathon
    type: event
    breaking: false
  - date: '2025-02-13'
    api: BCDA
    title: Normal data availability resumed for 2025 claims
    type: availability
    breaking: false
  - date: '2024-12-03'
    api: BCDA
    title: Temporary service limitation during annual end-of-year transition
    type: availability
    breaking: false
  - date: '2024-12-01'
    api: BCDA
    title: BCDA performance improvement to speed up job requests
    type: performance
    breaking: false
  - date: '2024-11-18'
    api: BCDA
    title: Updated guidance on managing BCDA credentials
    type: docs
    breaking: false
    highlights:
      - New guidance for managing credentials in 4i and ACO-MS.