HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating a service or procedure associated with a HCFA/ORD demonstration project.

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating live kidney donor surgery and related services.

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating a service for the ordering or referring physician that qualifies as a service exemption. The physician has a financial relationship with the entity performing the service that qualifies as one of the service-related exemptions.

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating service furnished by a substitute physician under a reciprocal billing arrangement.

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating a service furnished by a locum tenens physician.

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating one class A finding on foot care procedures that indicates the severity of the patient’s systemic condition without writing a narrative description. This is a nontraumatic amputation of foot or integral skeletal portions.

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating two class B findings on foot care procedures that describe the severity of the patient’s systemic condition without writing a narrative description. Class B findings: absent posterior tibial pulse, absent dorsalis pedis pulse, advanced trophic changes (i.e., hair growth [decrease, absence], nail changes [thickening], pigmentary changes [discoloration], skin texture [thin, shiny], and/or skin color [rubor, redness]).

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating one class B and two class C findings on foot care procedures that describe the severity of the patient’s systemic condition without writing a narrative description. Class C findings: claudication, temperature changes, edema, paresthesia, and burning.

HCPCS Level II modifier that was used with CPT or HCPCS Level II codes and indicated a physician provided a service in a rural health professional shortage area (HPSA). Modifier AQ, which became effective January 1, 2006, replaced the QU modifier.