Which modifier indicates anesthesia service performed by an anesthesiologist for a CRNA?

The QY modifier specifically indicates that an anesthesiologist is providing anesthesia services to a patient while the anesthesia is being performed by a Certified Registered Nurse Anesthetist (CRNA). This modifier is used when the anesthesiologist is supervising the CRNA during the procedure, signifying that the service is under the direction of the anesthesiologist but performed by the CRNA.

In the context of anesthesia coding, modifiers are crucial for accurately communicating the nature of the provided services and who performed them. The QY modifier clarifies the relationship between the anesthesiologist and the CRNA, which can impact billing and reimbursement processes. Understanding the purpose of this and similar modifiers ensures compliance with coding standards and proper documentation of anesthesia services.