So frustrated I am about to scream! I am studying to take the CPC exam in a week and have been taking the AAPC practice exams. Questions keep coming up with modifiers for anesthesia and Level II HCPCS (I think) such as -AA, GA, QA. I cannot find a complete listing of all modifiers in any of my AAPC approved manuals. I have 2010 CPT Professional Edition, 2010 ICD-9-CM Professional Edition by Carol Buck and 2010 HCPCS Level II professional Edition by Carol Buck. in fact I cannot find these modifiers located anywhere in any of these books. Can anyone help me find a comprehensive listing of modifiers? TIA, Susan