A B C D E F G H J K L P Q R S T U V
A2 A3 A4 A5 A6 A7 A8 A9 Aa Ad Ae Af Ag Ah Aj Ak Am Ar At Au Av Aw Ax

AA

HCPCS Level II modifier for anaesthesia performed by an anaesthetist that can be used with CPT or HCPCS Level II codes. The use of this modifier has an impact on Medicare payment.