What Is Medicare Part B Fee Schedule? 
CMS -LRB- Center for Medicare Services -RRB- determines how much they will pay for medical services . Doctors , hospitals , clinics , labs , etc. that treat Medicare beneficiaries are required to accept the fee schedule . If the provider accepts Medicare assignment they are prohibited from balance billing . If they do not accept Medicare assignment , they are allowed to charge a higher amount but must adhere to the Medicare caps on excess charges . Medigap plan F and G will cover excess charges . 