Modifier Description 1P Performance measure exclusion; due to medical reasons
2P Performance measure exclusion; due to patient choice
3P Performance measure exclusion; due to system reasons
8P Performance measure exclusion; reason not specified
AA Services personally furnished by anesthesiologist
AD Reported when the medical supervision by a physician is for more than four concurrent anesthesia services .
AE Registered dietician
AF Specialty physician
AG Primary physician
AH Clinical psychologist
AI Physician of record
AJ Clinical social worker
AK Non participating physician
AM Physician, team member service
AS Assistant at surgery by non-physician provider (NP, CNS, PA)
E1 Upper left eyelid
E2 Lower left eyelid
E3 Upper right eyelid
E4 Lower right eyelid
F1 Left second digit hand
F2 Left third digit hand
F3 Left fourth digit hand
F4 Left fifth digit hand
F5 Right thumb
F6 Right second digit hand
F7 Right third digit hand
F8 Right fourth digit hand
F9 Right fifth digit hand
FA Left thumb
GA Certificate of waiver obtained (ABN executed)
Modifiers–The Rest of the Story www.aapc.com
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GG Performance and payment of a screening mammogram and diagnostic mammogram on the same patient, same
day
GH Diagnostic mammogram converted from screening mammogram on same day
