Ask Margie: PA modifiers for bilateral total knee replacement

Why This Topic Matters

Bilateral surgery claims with assistant services can be denied or processed inconsistently if modifiers are applied in a way a payer does not accept. Understanding the Medicare policy context and contractor differences helps billing teams evaluate why claims may not reimburse as expected.

Article Sections

1. Question

   Introduces a billing question about physician assistant charges in bilateral total hip or knee replacement cases. The section frames the reimbursement issue and the general claim format being used.

2. Answer

   Summarizes Medicare-related guidance on reporting bilateral surgery and assistant-at-surgery services. It also notes the need to confirm payer-specific requirements before submitting claims.

3. Official resource

   Lists the referenced Medicare manual source supporting the discussion. This section identifies the external guidance used in the article.