CMS-0057 Data Sharing Requirements: How Payers Can Safely Test Provider Access and Payer-to-Payer APIs

CMS-0057 also expands requirements around healthcare data access and exchange. Providers must be able to retrieve clinical and claims data, while payers must support data sharing when members transition between health plans. These capabilities are critical for improving continuity of care across the healthcare ecosystem.

Implementing these APIs requires coordination across multiple systems and organizations. Testing directly with real partners can slow development because each organization may be at a different stage of readiness. Additionally, using live data introduces operational and compliance concerns.

A controlled testing environment allows payer teams to simulate both provider and payer partners while validating complex workflows such as attribution, data retrieval, and bulk data exchange. By resolving issues before connecting with real organizations, teams can accelerate partner onboarding and reduce implementation friction.