Is the provider non-par or has he opted out of Medicare? There is a difference. Non-par providers must still submit claims to Medicare, they will then pay the patient directly. If a provider is non-par he can decide on a case by case basis if he will accept assignment for a particular claim, he must also follow all of CMS' regulations and can only bill the patient up to the limiting charge.

If he has opted out neither he nor the patient can send any claims to Medicare (except in very limited emergency situations). In this case, the patient would be entirely responsible for the bill. If this is the case then as the above poster suggested you need to contact the secondary insurer regarding how to bill, otherwise you need to contact your clearinghouse and explain the difference between non-par and opted out because you can still submit claims if you are non-par.

You also need to know how the fees are set up: See example: