I happened to come across this and thought it might be helpful:
CMS Manual System
Department of Health &Human Services (DHHS)
Pub 100-04 Medicare Claims Processing
Centers for Medicare & Medicaid Services (CMS)
Transmittal 2997
Date: July 25, 2014
Change Request 8688
4. Evaluation and Management Service Resulting in the Initial Decision to Perform Surgery
Evaluation and management services on the day before major surgery or on the day of major surgery that result in the initial decision to perform the surgery are not included in the global surgery payment for the major surgery and, therefore, may be billed and paid separately.
In addition to the CPT evaluation and management code, modifier ?-57? (decision for surgery) is used to identify a visit which results in the initial decision to perform surgery. (Modifier ?-QI? was used for dates of service prior to January 1, 1994.)
If evaluation and management services occur on the day of surgery, the physician bills using modifier ?-57,? not ?-25.? The ?-57? modifier is not used with minor surgeries because the global period for minor surgeries does not include the day prior to the surgery. Moreover, where the decision to perform the minor procedure is typically done immediately before the service, it is considered a routine preoperative service and a visit or consultation is not billed in addition to the procedure.
The source url is
https://www.cms.gov/Regulations-and-Guidance/Guidance/Transmittals/Downloads/R2997CP.pdf