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 Medicare Claims Processing Manual, (IOM Pub.100-04), Chapter 24 for more information on the 837 COB claims transaction. Information concerning the Medicare Coordination of Benefits (COB)/Coordination of Benefits Agreement (COBA) claims crossover process may be referenced in the Medicare Claims Processing Manual (IOM Pub.100-4), Chapter 28, Section 70.6 and successive sections. Additional information about the COBA crossover process is available.
HIPAA TR3s can be purchased at the official Washington Publishing Company (WPC) website.