Which statement correctly describes the GP modifier in therapy billing?

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Multiple Choice

Which statement correctly describes the GP modifier in therapy billing?

The GP modifier flags that the therapy service is provided under a physical therapy plan of care. This is important because Medicare and many payers pay therapy services differently when they’re part of an established PT plan of care, confirming the service fits within that ongoing plan rather than a one-off, non-plan service. It isn’t strictly about who performed the service (PT vs. PTA); a therapy assistant can deliver under supervision as part of the PT plan, but the line must indicate it’s under that plan of care. The other statements don’t apply: GP isn’t used on every claim, isn’t limited to private insurance, and isn’t a mechanism to cancel a claim.

The GP modifier flags that the therapy service is provided under a physical therapy plan of care. This is important because Medicare and many payers pay therapy services differently when they’re part of an established PT plan of care, confirming the service fits within that ongoing plan rather than a one-off, non-plan service. It isn’t strictly about who performed the service (PT vs. PTA); a therapy assistant can deliver under supervision as part of the PT plan, but the line must indicate it’s under that plan of care. The other statements don’t apply: GP isn’t used on every claim, isn’t limited to private insurance, and isn’t a mechanism to cancel a claim.

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