Infct fol a proc, deep incisional surgical site, sequela

This code signifies a deep incisional surgical site infection that has developed as a complication of a previous surgical procedure, and the patient is now presenting for treatment of the long-term effects or complications of this infection. This indicates that the acute phase of the infection may have passed, but its sequelae are still being addressed.

Use this code when documenting a patient presenting with chronic osteomyelitis, non-union of a fracture, or persistent draining sinus tracts directly attributable to a deep incisional surgical site infection that occurred in the past. This code is appropriate for follow-up encounters where the focus is on managing the residual effects of such an infection.

• Requires a seventh character "S" to indicate sequela, meaning the late effects of the infection.
• Always sequence this code after the code(s) for the specific sequela being treated (e.g., osteomyelitis).
• Do not use for active, acute deep incisional surgical site infections; those require codes from the T81.42X_ series with an A or D seventh character.