Which HCPCS Level II modifier is used for CRNA service without medical direction by a physician?

The HCPCS Level II modifier that indicates Certified Registered Nurse Anesthetist (CRNA) service provided without medical direction by a physician is QZ. This modifier is specifically designed to indicate that the CRNA is practicing independently, without the supervision or guidance of a physician.

Using this modifier is important for billing and reimbursement purposes, as it communicates to the payers that the anesthesia services were rendered solely by the CRNA. In contrast, the other modifiers have different implications; for instance, QK denotes services provided with medical direction by a physician, AA is for anesthesia services provided by an anesthetist, and G8 relates to specific medical procedures rather than the independent practice of CRNAs. Understanding these distinctions is key for accurate medical coding and ensuring appropriate reimbursement for services rendered.