Medicare doesn't bill insurance at all. If you have secondary insurance your doctor should bill both Medicare and your secondary insurance. If he doesn't then you need to send the bills to the insurance company yourself, but most doctors and hospitals will handle that, you shouldn't have to. Most are happy to do so since it helps them get paid faster.
Your doctor or other medical provider does NOT bill your Medicare supplement carrier. All claims are electronically filed directly with Medicare. Medicare reviews and adjudicates the claim, then passes on the claim to your Medicare supplement carrier that is on record.
This is all part of the crossover process where the claim moves from Medicare to your supplement carrier.
http://www.medicarecrossover.com/
Your supplement carrier does not adjudicate claims and cannot deny any claim approved by Medicare.
This is all part of the crossover process where the claim moves from Medicare to your supplement carrier.
http://www.medicarecrossover.com/
Your supplement carrier does not adjudicate claims and cannot deny any claim approved by Medicare.