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Modifier GN

Therapy discipline & assistants

Modifier GN. Services delivered under a speech-language pathology plan of care. (Only one discipline modifier per line — never stack GP/GO/GN.)

Reference only — CPT descriptors are AMA-copyrighted (paraphrased). Payment percentages and acceptance vary by payer; verify against the current CPT/HCPCS files and payer policy.

Related modifiers

GP
Services delivered under a physical therapy plan of care.
GO
Services delivered under an occupational therapy plan of care.
CQ
Service furnished in whole or part by a physical therapist assistant (PTA) — tri…
CO
Service furnished in whole or part by an occupational therapy assistant (OTA) — …
KX
Requirements specified in the medical policy have been met — for therapy, attest…

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