Industry-standard modifiers are often used with procedure codes to clarify the circumstances under which medical services were performed. Modifiers allow the reporting physician to indicate that a service or procedure has been altered by some specific circumstance, but has not been changed in definition or code.
Providers may use modifiers to indicate one of the following:
Providers should use applicable modifiers that fit the description of the service and the claim will be processed accordingly. The CPT and HCPCS publications contain lists of modifiers available for describing services.