Which Anesthesia modifier is reported when the CRNA is not medically directed?

The correct answer is associated with the specific modifier used to indicate that a Certified Registered Nurse Anesthetist (CRNA) is providing anesthesia services independently, without medical direction from a physician.

In this case, the modifier indicates that the CRNA is performing the service on their own and is not under the supervision of a physician. This is significant because Medicare and other payers may have different reimbursement rules based on whether the CRNA is working under medical direction or independently.

Using the correct modifier is essential for accurate billing and reporting, reflecting the CRNA's level of responsibility and the nature of the service provided. Thus, when a CRNA is not medically directed, it is important to report this accurately to ensure appropriate reimbursement and compliance with regulations.

Other modifiers mentioned do not accurately represent the scenario where the CRNA operates independently, and therefore would not be applicable in this case.