Coordination of Benefits
The X12 837 HIPAA Technical Reports Type 3 (TR3s) adopted as the national standard for provider electronic submission of health care claims to payers such as Medicare, also contains the requirements for electronic transfer of claims from Medicare to another payer. See the CMS link for information on CMS policy and procedures, and trading partner agreement requirements for coordination of benefits (COB). Information concerning the transfer of responsibility for Durable Medical Equipment Medicare Administrative Contractors (DME MACs) and A/B MACs to a single COB contractor is also available at that linked site.
See Medicare Claims Processing Manual, (Pub.100-04), Chapter 24 for further information on COB.