Other secondary gout, left knee

This code signifies a form of gout that develops as a consequence of another underlying condition, specifically affecting the left knee joint. It indicates the presence of urate crystal deposition and inflammation in the left knee, where the hyperuricemia is not primary but rather secondary to another disease process or medication.

Apply this code when documentation clearly states "secondary gout" impacting the left knee. This typically occurs in patients with conditions like renal insufficiency, myeloproliferative disorders, or those on certain medications (e.g., diuretics, aspirin) that lead to elevated uric acid levels and subsequent gouty arthritis in the specified joint. Supporting documentation should detail the secondary nature of the gout and its specific manifestation in the left knee.

• Ensure documentation explicitly states "secondary gout" and specifies the left knee; avoid using for primary gout.
• Always code the underlying condition causing the secondary gout first, followed by this code.
• Distinguish from other forms of gout (e.g., M10.0- for idiopathic gout, M10.1- for lead-induced gout) based on physician documentation.