Modifier GC

Service has been performed in part by a resident under the direction of a teaching physician

Correct Use

  • Append to service that has been completed by a resident in a teaching facility in part under direction and supervision of a teaching physician
  • Append in second modifier field when supervising/teaching anesthesiologist is involved in two concurrent anesthesia cases with one resident (or "fellow"), he/she may bill usual base units and anesthesia time for amount of time present with resident throughout pre, intra and post anesthesia care.

Incorrect Use

  • Append to service when teaching physician is not involved with any part of care

Teaching Physician Documentation

Teaching physicians shall personally document that they performed the service or were physically present during key or critical portions of the service and their participation in the management of the patient. The physician is able to refer to the resident's documentation; however, a statement by the attending (teaching) physician is required and must include essential and independent documentation to tie into the resident's documentation. Without such documentation, no reimbursement can be made.


  • Acceptable
    • Patient became hypoxic and hypotensive. I spent 45 minutes while the patient was in this condition, providing fluids, pressor drugs and oxygen. I reviewed the resident's assessment and plan of care.
  • Unacceptable
    • I saw the patient and agree with the resident.

Note: In a time based setting, such as critical care, time spent teaching does not count towards the critical care time of the physician; nor does the time the resident spent with the patient. Only time spent together with the patient or the teaching physician alone can be counted towards critical care time.



Last Updated Thu, 13 Feb 2020 12:05:12 +0000