Ask Dr. Z

I'm being told to append a -24 modifier to the E&M code for a patient in a global period. Patient had an AVG placed and is admitted for a complication during the global period (e.g., for thrombus or stenosis). My surgeon does a consultation and decides to take the patient back to the OR. Can I append the -24 modifier to the E&M code? I have been using modifier -57, and my claims are getting denied. Is this E&M part of the global package? Most of his procedures are open (e.g., revision with or without thrombectomy). Codes 36832 and 36833 will start a new global period. Please advise on the proper use of the E&M modifiers.