Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
A Coordination of Benefits (COB) Contractor is a third-party company contracted with CMS to consolidate the activities that support the collection, management, and reporting of other insurance coverage of Medicare beneficiaries. A Voluntary Data Sharing Agreement (VDSA) can be set up to exchange retiree data with CMS' RDS Center.
