Free Medical Coding

ICD10CM, HCPCS, PCS, DRG codes lookup for free! Coding news and articles and more!

Free Medical Coding > Free 2025 HCPCS Codes > 2025 HCPCS Modifiers > HCPCS ‘G’ Modifiers

HCPCS ‘G’ Modifiers

  • ModifierDescription
  • G0Telehealth services for diagnosis, evaluation, or treatment, of symptoms of an acute stroke
  • G1Most recent urr reading of less than 60
  • G2Most recent urr reading of 60 to 64.9
  • G3Most recent urr reading of 65 to 69.9
  • G4Most recent urr reading of 70 to 74.9
  • G5Most recent urr reading of 75 or greater
  • G6Esrd patient for whom less than six dialysis sessions have been provided in a month
  • G7Pregnancy resulted from rape or incest or pregnancy certified by physician as life threatening
  • G8Monitored anesthesia care (mac) for deep complex, complicated, or markedly invasive surgical procedure
  • G9Monitored anesthesia care for patient who has history of severe cardio-pulmonary condition
  • GAWaiver of liability statement issued as required by payer policy, individual case
  • GBClaim being re-submitted for payment because it is no longer covered under a global payment demonstration
  • GCThis service has been performed in part by a resident under the direction of a teaching physician
  • GEThis service has been performed by a resident without the presence of a teaching physician under the primary care exception
  • GFNon-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
  • GGPerformance and payment of a screening mammogram and diagnostic mammogram on the same patient, same day
  • GHDiagnostic mammogram converted from screening mammogram on same day
  • GJ“opt out” physician or practitioner emergency or urgent service
  • GKReasonable and necessary item/service associated with a ga or gz modifier
  • GLMedically unnecessary upgrade provided instead of non-upgraded item, no charge, no advance beneficiary notice (abn)
  • GMMultiple patients on one ambulance trip
  • GNServices delivered under an outpatient speech language pathology plan of care
  • GOServices delivered under an outpatient occupational therapy plan of care
  • GPServices delivered under an outpatient physical therapy plan of care
  • GQVia asynchronous telecommunications system
  • GRThis 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
  • GSDosage of erythropoietin stimulating agent has been reduced and maintained in response to hematocrit or hemoglobin level
  • GTVia interactive audio and video telecommunication systems
  • GUWaiver of liability statement issued as required by payer policy, routine notice
  • GVAttending physician not employed or paid under arrangement by the patient’s hospice provider
  • GWService not related to the hospice patient’s terminal condition
  • GXNotice of liability issued, voluntary under payer policy
  • GYItem or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit
  • GZItem or service expected to be denied as not reasonable and necessary