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CMS Blue Button API: Implementation Guides for Patient Data Sharing

Implementation Guides - CMS Blue Button API

December 11, 2025Centers for Medicare & Medicaid Services (CMS)

Summary

The U.S. has introduced the 'Blue Button Framework' via a FHIR-based API, allowing payers to display consumer data. This mechanism impacts various health plans, such as Medicare and Medicaid, facilitating the sharing of information like clinical records and encounter data.

Details

This guide is based on implementation guides provided by the Centers for Medicare & Medicaid Services (CMS) regarding the Blue Button API. This API utilizes a FHIR-based framework designed to allow payers to display specific health data to consumers. Specifically, it defines the 'Common Payer Consumer Data Set (CPCDS)' and applies across multiple insurance plans, including Medicare, Medicaid, and CHIP. Through this mechanism, payers can share adjudicated claims and encounter data with third parties via a Patient Access API. Furthermore, CARIN also provides an artifact summary guide for v2, offering code explanations and benefits related to Explanation of Benefits (EOB) profiles. These standardized data exchange methods constitute a critical policy framework promoting patient-centric access to medical information in the U.S.

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