I paid for methadone from a substance abuse clinic from approximately 2006 to 2014 70$ weekly out of pocket because that particular clinic didn't Bill insurance companies. In 2014 I transferred to a clinic that bills my insurance company for me. I live in Iowa and have been covered by wellmark bcbs throughout this entire time. Is it possible to be reimbursed for the 8 years of treatment that should have been covered but it was never billed. I have receipts to document all out of pocket expense from that time. Any help would be appreciated.