Cpt Modifier List 2025. Modifiers you need to know. A modifier provides the means by which the reporting physician or provider can indicate that a service or procedure that has been performed has been altered by some specific circumstance but not changed in its definition or code.

A complete list of valid modifiers is listed in the most current cpt or hcpcs code book. Hcpcs code g2025 for payment for a telehealth distant site service furnished by a rural health clinic (rhc) or federally qualified health center (fqhc) only as maintained by cms.