GV Modifier- is used when a physician is providing a service that is related to the diagnosis for which a patient has been enrolled in hospice. This physician is not associated with the hospice and is providing services as the attending physician.
GW Modifier- is used when a physician is providing a service that is not related to the diagnosis for which a patient has been enrolled in hospice. This physician is not associated with the hospice and is providing services as the attending physician.