TMPPM 2010 > Medical and Nursing Specialists, Physicians, and Physician Assistants Handbook > Physician > Procedures and Services > Anesthesia > Anesthesia Modifiers

6.3.4.10.3 CRNA Services

Modifiers QZ and U1 must be submitted when a CRNA has personally performed the anesthesia services, is not medically directed by the anesthesiologist, and is directed by the surgeon.

Modifiers QX and U2 must be submitted by a CRNA who provided services under the medical direction of an anesthesiologist.