The information previously provided for Modifier 76 is inaccurate. Modifier 76 is not used just for same day only. Please see below

, plus some added on info regarding the other modifiers useable within the surgical post operative period.
Modifier -76: Used to indicate that a procedure or service was repeated subsequent to the original procedure or service by the same provider ID on for the same member on the same date of service OR within the post-operative period. [Used for Outpatient and in office procedures] [
Global does not reset]
So yes, you can used Modifier 76 when the same exact procedure and same diagnosis code is being repeated during the global period, if there is no extra/extensive work or new diagnosis.
-Example 1: Patient had an Incision and Drainage 26011 for cellulitis of the finger, within the 10 day global they need to go back in for repeat of the same procedure code and same cellulitis diagnosis (this is the same example from the initial question of this thread).
-Example 2: Patient had Dupuytren's Contracture and went in for procedure to excise the palmar fascia 26121, but within the 90 day global they are having to go back again for the same procedure, which is not uncommon for this to happen with Dupuytren's Contracture.
Modifier 58 would be used when it was planned prior to the original surgery taking place or a more extensive procedure [Modifier used for outpatient and in office procedures] [
Global starts over, unless the new procedure has a 0 or 10 day global expiring before initial active 90 day global ends].
-Example (unplanned): Patient had closed reduction pinning of a fracture, during post operative appointments for return of x-rays to see how the healing is progressing there could be a possible healing delay or a malunion/nonunion and the patient needs to go back to surgery to remove the pins and convert over to an open approach with plate/screws, excision of bone defect and/or bone grafting.
-Example (planned): Patient had closed reduction pinning of a fracture with use of Kwires and has healed as expected, they come in for post operative appointment in office to have the Kwire pins removed, 20670.
Modifier 78 would be used if it is an unplanned procedure because a complication occurred resulting with a possible change in diagnosis related to the primary diagnosis from the original procedure [Modifier accepted for Outpatient only, not useable for in office procedures] [
Global does not start over].
-Example: Patient had an open repair of a fracture, they are now coming back in for pain at the site of where the hardware was placed. XRAY imaging is showing there is mechanical complication from internal hardware placed and the patient needs to go back to surgery to have the hardware removed, and also the need to replace the hardware would also be coded with modifier 78. Removal of internal plates and screws is most always considered unplanned as they normally do not come out and insurance does not pay for staged internal hardware removal unless there is medical necessity to prevent further complications.
Modifier 79 would be used if it is a new diagnosis being billed out as a sequela to the primary diagnosis or unrelated body part/system than what the patient was originally being treated for [Modifier accepted for both outpatient and in office procedures] [
New global period starts].
-Example 1: Patient had an Open Repair of a fracture, Patient comes back in and now has an infection of the bone and new diagnosis is acute Osteomyelitis sequela to the fracture. Patient is now going back to surgery to have their distal phalanx resected due to a bone infection. Doctor is now treating an infection and no longer the fracture.
-Example 2: Patient had open repair of the fracture but during the post operative period the incisional site is not healing and has opened back up, patient needs wound repair of the surgical incisional site which ends up being done in the office, the doctor is now treating the incisional wound and no longer the fracture. HOWEVER, check your insurance guidelines Medicare does not like to approve 79 for post op infections and usually have to bill out modifier 78 which is only allowed in outpatient settings.