Removal of Infected hardware

Surgeon performed removal of infected hardware of a distal humerus fracture and excision of heterotopic bone of the elbow.  The patient had a plate both on the distal humerus and on the ulna.  I coded 24149 and 20680x2.  The surgeon added 23935.  I don't see anywhere in the op report that he even went down to the bone.  He didn't scrape it or remove any bone.  I see he debrided infected tissue but I included that in the removal of hardware.   I also only coded one hardware removal since it was one treatment of the fracture.   Is the debridement of the infection billable separately?

Thanks in advance.

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