Implementation GuidesStable

Blue Button 2.0 (CMS)

CMS's FHIR API exposing Medicare claims data to ~60M beneficiaries via patient-authorized apps. The reference implementation for patient-mediated claims exchange.

Run by CMS at bluebutton.cms.gov. Patients authorize an app via Medicare.gov login; app gets FHIR access to:

ExplanationOfBenefit (claims)

Patient

Coverage

Built on the CARIN Blue Button IG profile set.

Status note: CMS announced plans in 2025 to rebrand and modernize Blue Button as part of the broader Interoperability Roadmap. Builders should track CMS announcements on rebranding/deprecation timelines.

External links

→Blue Button 2.0 docs →Sandbox