What modifier is used to indicate CRNA services with medical direction by a physician?

The modifier that is used to indicate CRNA (Certified Registered Nurse Anesthetist) services with medical direction by a physician is the QX modifier. This modifier specifically denotes that the CRNA is under the medical direction of a physician, which is crucial for billing practices in anesthesia services.

When the QX modifier is appended to a CRNA service code, it indicates that the physician is providing oversight and supervision, which is a requirement for proper reimbursement for these services. This medical direction typically implies that the CRNA is working closely under the guidance of an anesthesiologist or another physician trained in anesthesia, ensuring compliance with regulations surrounding anesthesia provision.

The context of this modifier helps to distinguish between different billing scenarios. Understanding the nuances of modifiers is essential in the billing and coding process, as it accurately reflects the relationship between the CRNA and the supervising physician, thereby influencing reimbursement criteria and compliance with Medicare and other insurance providers.