injection of incision/wound to prevent keloid

What's the appropriate code for injecting/infiltration of a wound (repeatedly) postop to prevent disfiguring keloid from recurring? 96372 seems not right as we use that for simple injection of meds.

injection

Global period, no charge. If not returned to OR, included in global allowance.

not global

Well, suppose the physician doing the injections of the incision is not the same as the physician who did the surgery and bills under a different EIN. Then what?