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Common Working File (CWF) Medicare Secondary Payer ( MSP) Coordination of Benefits Contractor (COBC) Number Update and Implementation of MSP Group Health Plan (GHP) COBC Hierarchy Rules as related to Mandatory Insurer Reporting

Updating the hierarchy of COBC contractor codes and updating the CWF
error codes to accommodate the implementation of this change request.

Download the Guidance Document

Issued by: Centers for Medicare & Medicaid Services (CMS)

Issue Date: November 19, 2010

DISCLAIMER: The contents of this database lack the force and effect of law, except as authorized by law (including Medicare Advantage Rate Announcements and Advance Notices) or as specifically incorporated into a contract. The Department may not cite, use, or rely on any guidance that is not posted on the guidance repository, except to establish historical facts.