One thing to look for when you are reviewing your Medicare Summary Notice (MSN) is called upcoding. This is when a provider bills for a more advanced billing code than the code that corresponds with the care provided. This action causes an increase in the payment received by the provider.

If you receive psychotherapy services, watch for add-on services like Evaluation and Management (E&M codes), which would imply a medical service was also provided during the psychotherapy session (PST code).