Fistula, right knee

This code signifies the presence of an abnormal, open tract or passage originating from the right knee joint. This tract typically connects the joint space to the skin surface, allowing for drainage of fluid, pus, or other contents. It indicates a pathological communication that should not naturally exist.

Use this code when documentation explicitly states a fistula of the right knee. This often occurs post-surgically, due to infection, or as a complication of inflammatory arthritis. Supporting documentation would include operative reports, physician notes detailing the presence and location of the fistula, and imaging studies confirming its existence.

• Ensure laterality is clearly documented as "right knee" to avoid miscoding.
• Do not confuse with sinus tracts, which are blind-ended and do not connect two epithelialized surfaces.
• Code any underlying cause or associated infection of the fistula as an additional diagnosis.