MODIFIER AND CODE RULESBrowse as ListSearch WithinMODIFIER AND CODE RULESSection 20-2-I - MODIFIERS FOR CPT CODESSection 20-2-II - MODIFIERS APPROVED FOR AMBULATORY SURGERY CENTER (ASC) AND HOSPITAL OUTPATIENT USESection 20-2-III - MODIFIERS FOR HCPCS CODESSection 20-2-IV - PROCEDURE CODE EXCEPTIONS