Modifier 78: Unplanned return to the operating or procedure room for a related procedure during the postoperative period
When it is appropriate
Append modifier 78 to a procedure code when the patient has an unplanned return to the operating or procedure room for a complication of the original surgery during its postoperative global period, performed by the same physician.
When it is not appropriate
Do not use 78 for a planned, staged return already anticipated at the time of the original surgery (use 58 instead), or for a return that is unrelated to the original procedure (use 79 instead).
CMS preference
78 is one of the global surgery modifiers CMS lists as able to bypass an NCCI PTP edit specifically for this related, unplanned return to the operating room scenario.
Retrieved 2026-07-18.
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DenialPath provides billing and administrative guidance based on published CMS and X12 sources. It is not medical advice, not a coverage determination, and not a guarantee of payment. NCCI and MUE edits are republished quarterly and payer policies vary by contract. Always confirm against the payer's own current policy before submitting or appealing.