HCPCS modifier codes starting with G

35 codes. Every code ever valid for billing is listed, including those now retired.

Code	Description	Status
G0	Telehealth services for diagnosis, evaluation, or treatment, of symptoms of an acute stroke	Valid
G1	Most recent urr reading of less than 60	Valid
G2	Most recent urr reading of 60 to 64.9	Valid
G3	Most recent urr reading of 65 to 69.9	Valid
G4	Most recent urr reading of 70 to 74.9	Valid
G5	Most recent urr reading of 75 or greater	Valid
G6	Esrd patient for whom less than six dialysis sessions have been provided in a month	Valid
G7	Pregnancy resulted from rape or incest or pregnancy certified by physician as life threatening	Valid
G8	Monitored anesthesia care (mac) for deep complex, complicated, or markedly invasive surgical procedure	Valid
G9	Monitored anesthesia care for patient who has history of severe cardio-pulmonary condition	Valid
GA	Waiver of liability statement issued as required by payer policy, individual case	Valid
GB	Claim being re-submitted for payment because it is no longer covered under a global payment demonstration	Valid
GC	This service has been performed in part by a resident under the direction of a teaching physician	Valid
GD	Units of service exceeds medically unlikely edit value and represents reasonable and necessary services through FY2026	Terminated
GE	This service has been performed by a resident without the presence of a teaching physician under the primary care exception	Valid
GF	Non-physician (e.g. nurse practitioner (np), certified registered nurse anesthetist (crna), certified registered nurse (crn), clinical nurse specialist (cns), physician assistant (pa)) services in a critical access hospital	Valid
GG	Performance and payment of a screening mammogram and diagnostic mammogram on the same patient, same day	Valid
GH	Diagnostic mammogram converted from screening mammogram on same day	Valid
GJ	"opt out" physician or practitioner emergency or urgent service	Valid
GK	Reasonable and necessary item/service associated with a ga or gz modifier	Valid
GL	Medically unnecessary upgrade provided instead of non-upgraded item, no charge, no advance beneficiary notice (abn)	Valid
GM	Multiple patients on one ambulance trip	Valid
GN	Services delivered under an outpatient speech language pathology plan of care	Valid
GO	Services delivered under an outpatient occupational therapy plan of care	Valid
GP	Services delivered under an outpatient physical therapy plan of care	Valid
GQ	Via asynchronous telecommunications system	Valid
GR	This 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 policy	Valid
GS	Dosage of erythropoietin stimulating agent has been reduced and maintained in response to hematocrit or hemoglobin level	Valid
GT	Via interactive audio and video telecommunication systems	Valid
GU	Waiver of liability statement issued as required by payer policy, routine notice	Valid
GV	Attending physician not employed or paid under arrangement by the patient's hospice provider	Valid
GW	Service not related to the hospice patient's terminal condition	Valid
GX	Notice of liability issued, voluntary under payer policy	Valid
GY	Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit	Valid
GZ	Item or service expected to be denied as not reasonable and necessary	Valid