GP modifier: which statement is correct?

• A. It indicates therapy provided by a physical therapist.
• B. It indicates a surgical procedure.
• C. It indicates telehealth.
• D. It indicates administrative services.

Answer: (A)

GP signals that the services billed are physical therapy services delivered under a physical therapy plan of care. This modifier is used to show the treatment is part of ongoing PT management, not a standalone or non-PT service, and helps ensure proper reimbursement under PT guidelines.

That’s why the statement about therapy being provided by a physical therapist fits best—the modifier identifies PT services under a PT plan of care. It does not indicate a surgical procedure, telehealth, or administrative services, which are conveyed by different modifiers or coding conventions.