We have a patient in which both Medicare and Aetna paid for multiple dates of service as primary payers. Our office contacted both insurance companies who assured our office that they were in fact the primary payer.

In turn, we contacted the patient to ask that they contact Medicare and Aetna to update their coordination of benefits. The patient has since expired and we even called the patient’s spouse to ask them to contact the insurance companies regarding COB as well, with no success.

We are left with the question of who or how we should refund the overpayment(s) received. Any advice or input would be much appreciated.