Modifications to the National Coordination of Benefits Agreement (COBA) Medicare Claims Crossover Process
The purpose of this Change Request (CR) is to clarify the actions that our Medicare Administrative Contractors (MACs) should be taking in association with certain kinds of mass adjustment claims activities. The current practices that MACs are following are resulting in claims being marked incorrectly as certain kinds of mass adjustments under the COBA claims crossover process.
Issued by: Centers for Medicare & Medicaid Services (CMS)
Issue Date: July 24, 2025
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