GD HCPCS Level II modifier: Units of service exceeds medically unlikely edit value and represents reasonable and necessary services
CMS terminated GD: its last date of service was Dec 31, 2019. It stays here for looking up older claims; newer services need a current code.
Official description
GDUnits of service exceeds medically unlikely edit value and represents reasonable and necessary services
Short description: Unit of service > mue value
HCPCS · United States
Medicare details
The indicators CMS publishes with GD in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Added
- Jan 1, 2008
- Terminated after
- Dec 31, 2019
Where GD sits
- 1GroupHCPCS modifiers
- 2Terminated GDUnits of service exceeds medically unlikely edit value and represents reasonable and necessary services
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
Is HCPCS code GD still valid?
No. CMS terminated GD; its last date of service was Dec 31, 2019. It is listed for looking up services from before then. Use a current code for newer services.
Where is GD in the HCPCS Level II list?
GD is listed under Modifiers.
Does Medicare cover GD?
CMS lists GD’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 GD
All modifiersG7Pregnancy resulted from rape or incest or pregnancy certified by physician as life threateningG8Monitored anesthesia care (mac) for deep complex, complicated, or markedly invasive surgical procedureG9Monitored anesthesia care for patient who has history of severe cardio-pulmonary conditionGAWaiver of liability statement issued as required by payer policy, individual caseGBClaim being re-submitted for payment because it is no longer covered under a global payment demonstrationGCThis service has been performed in part by a resident under the direction of a teaching physicianGEThis service has been performed by a resident without the presence of a teaching physician under the primary care exceptionGFNon-physician (e.g. nurse practitioner (np), certified registered nurse anesthetist (crna), certified registered nurse (crn), clinical nurse specialist (cns), physician assistant…GGPerformance 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 modifier