Final answer:
CMS allows the PFFS plan to decide if balance billing is permitted.
Step-by-step explanation:
This question is related to Medicare, specifically the Private Fee-for-Service (PFFS) plans. CMS, which stands for Centers for Medicare and Medicaid Services, allows the PFFS plan to decide if balance billing is permitted.
Balance billing refers to the practice of charging patients for the difference between the provider's actual charge and the amount paid by Medicare. In PFFS plans, providers have flexibility in determining whether they will accept Medicare's payment as full payment or charge patients additional amounts.
Overall, CMS gives PFFS plans the authority to determine if balance billing is allowed or not.