4 5 7 A B C D E F G H I J K L M P Q R S T U V W X Y Z
Ca Cb Cc Cd Ce Cf Cg Ch Ci Cl Cm Co Cp Cr Cu Cy

CF

1. Abbreviation for conversion factor. 2. HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating AMCC test, not composite rate.