HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating that a claim is being submitted with a written statement of intent (SOI).

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating monitored anesthesia care service.

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating recording and storage on tape by an analog tape recorder.

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

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating an item or service provided as routine care in a Medicare-qualifying clinical trial. To be reported using ICD-9-CM diagnostic code V70.7 as the primary diagnosis for CMA-1500 claims and as a secondary diagnosis for Uniform Bill (UB-04) claims.

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating a clinical laboratory improvement amendment (CLIA) waived test.

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating a certified registered nurse anesthetist (CRNA) service with medical direction by a physician. Payment is up to 55% of the amount that would have been allowed if personally done by a physician.

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating medical direction of one certified registered nurse anesthetist (CRNA) by an anesthesiologist.

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating a certified registered nurse anesthetist (CRNA) service without medical direction by a physician.R