HCPCS Level II Modifiers Latest Update 100% Correct

HCPCS Level II Modifiers Latest Update 100% Correct - **AA** Anesthesia services provided directly by an anesthesiologist. - **AD** Oversight for more than four concurrent anesthesia services. - **AQ** Physician providing services in a designated Health Professional Shortage Area (HPSA) from January 1, 2006. - **AR** Physician providing services in an area with a scarcity of physicians. - **AS** Services provided by a physician assistant, nurse practitioner, or clinical nurse specialist under physician supervision. - **AT** Acute or chronic active/corrective treatment effective from October 1, 2004. - **CB** Services ordered by a dialysis facility physician for End-Stage Renal Disease (ESRD) beneficiaries, separately reimbursable from the composite rate. - **CC** Change of procedure code due to administrative reasons or incorrect filing. - **CR** Catastrophe or disaster-related services. - **EJ** Subsequent claim for EPO (epoetin alfa) therapy. - **E1** Procedure performed on the upper left eyelid. - **E2** Procedure performed on the lower left eyelid. - **E3** Procedure performed on the upper right eyelid. - **E4** Procedure performed on the lower right eyelid. - **FA** Procedure performed on the left hand thumb. - **F1** Procedure performed on the left hand second digit. - **F2** Procedure performed on the left hand third digit. - **F3** Procedure performed on the left hand fourth digit. - **F4** Procedure performed on the left hand fifth digit. - **F5** Procedure performed on the right hand thumb. - **F6** Procedure performed on the right hand second digit. - **F7** Procedure performed on the right hand third digit. - **F8** Procedure performed on the right hand fourth digit. - **F9** Procedure performed on the right hand fifth digit. - **GA** Advance Beneficiary Notification on file. - **GC** Service partially performed by a resident under the supervision of a teaching physician. - **GE** Service performed by a resident without the presence of a teaching physician, under primary care exception. - **GG** Performance and payment for both a screening and diagnostic mammogram on the same patient on the same day from January 1, 2002. - **GJ** Emergency or urgent service provided by an "OPT OUT" physician or practitioner. - **GM** Ambulance service transporting multiple patients. - **GN** Service delivered under an outpatient speech-language pathology plan of care. - **GO** Service delivered under an outpatient occupational therapy plan of care. - **GP** Service delivered under an outpatient physical therapy plan of care. - **GQ** Service provided via asynchronous telecommunications system. - **GT** Service provided via interactive audio