GN HCPCS Level II modifier: Services delivered under an outpatient speech language pathology plan of care
GN is a HCPCS Level II modifier: “Services delivered under an outpatient speech language pathology plan of care.” It adds this detail to the code it is reported with.
Official description
GNServices delivered under an outpatient speech language pathology plan of care
Short description: Op speech language service
HCPCS · United States
Medicare details
The indicators CMS publishes with GN in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Added
- Jan 1, 1999
Where GN sits
- 1GroupHCPCS modifiers
- 2Modifier GNServices delivered under an outpatient speech language pathology plan of care
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does HCPCS code GN mean?
GN is the HCPCS code for “Services delivered under an outpatient speech language pathology plan of care” in CMS’s HCPCS Level II October 2026 release.
Where is GN in the HCPCS Level II list?
GN is listed under Modifiers.
Does Medicare cover GN?
CMS lists GN’s Medicare coverage as “Carrier judgment”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.
Which HCPCS Level II release does this page use?
It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside GN
All modifiersGGPerformance and payment of a screening mammogram and diagnostic mammogram on the same patient, same dayGHDiagnostic mammogram converted from screening mammogram on same dayGJ"opt out" physician or practitioner emergency or urgent serviceGKReasonable and necessary item/service associated with a ga or gz modifierGLMedically unnecessary upgrade provided instead of non-upgraded item, no charge, no advance beneficiary notice (abn)GMMultiple patients on one ambulance tripGOServices delivered under an outpatient occupational therapy plan of careGPServices delivered under an outpatient physical therapy plan of careGQVia asynchronous telecommunications systemGRThis service was performed in whole or in part by a resident in a department of veterans affairs medical center or clinic, supervised in accordance with va policyGSDosage of erythropoietin stimulating agent has been reduced and maintained in response to hematocrit or hemoglobin levelGTVia interactive audio and video telecommunication systems