Our office has received a refund recovery request for BCBS Federal. We verified the patients insurance at the time of service. He had Tricare and BCBS, and we verified that BCBS is primary. After discussing this w/ the patient he told me that he didn't understand why he had to use BCBS because that was his Ex-wife's insurance and that had been divorced for years, she just never took him off her plan. That was February 2012. On June 30th we got the refund request stating his coverage terminated 4/1/2010. Can they legally do this? He was not able to use his TRICARE because the BCBS was primary. They are asking for close to 5,000.