Determining the Duration of a Global Period
To determine the global period for major surgeries, count 1 day immediately before the day of the surgery, the day of surgery and the 90 days immediately following the day of surgery. For example, if the date of surgery is January 5, the last day of the operative period would be April 5. To determine the global period for minor procedures, count the day of surgery and the appropriate number of days immediately following the date of surgery.
For a list of surgery codes with their corresponding global aftercare days and the multiple surgery indicator,
please refer to the Medicare Advisory or you may visit the CMS Web site at:
To know about basics of surgery billing modifiers