Other secondary gout, unspecified knee

This code signifies gout that has developed as a consequence of another underlying medical condition, affecting an unspecified knee joint. It indicates the presence of urate crystal deposition and subsequent inflammatory arthritis in the knee, where the primary cause is not idiopathic gout.

Use this code when documentation clearly states "secondary gout" involving the knee, but the specific knee (right or left) is not identified. This diagnosis is appropriate when the gout is attributed to conditions such as renal failure, myeloproliferative disorders, or certain medications.

• Ensure documentation specifies "secondary gout" and involvement of the knee.
• Avoid using this code if the specific knee (right or left) is documented; instead, use the more specific M10.461 or M10.462.
• Always code the underlying condition causing the secondary gout first, followed by this code.