Which HCPCS level II modifier indicates services performed by an anesthesiologist?

The HCPCS level II modifier that indicates services performed by an anesthesiologist is -AA. This modifier specifically denotes that the anesthesiologist was the one who personally administered anesthesia during a surgical procedure. It ensures that the billing reflects the actual provider of the anesthesia services, which is essential for accurate reimbursement from payers.

Using the -AA modifier is especially important because it differentiates the type of anesthesia services provided, allowing for correct coding in relation to payment and accountability. Anesthesiology services can sometimes be performed by different providers or in various settings, making this modifier vital for compliance with billing regulations and for maintaining clear medical records.