Idiopathic chronic gout, left hip, with tophus (tophi)

This code signifies a chronic inflammatory arthritis of unknown origin affecting the left hip joint, characterized by the deposition of monosodium urate crystals, forming visible or palpable tophi. It indicates a persistent form of gout where the underlying cause is not identified, specifically impacting the left hip and presenting with these characteristic crystal deposits.

Apply this code when documentation clearly states idiopathic chronic gout involving the left hip, and explicitly mentions the presence of tophi. This is appropriate for patients with a long-standing history of gout in this specific joint, where other causes of hyperuricemia have been ruled out.

• Ensure documentation specifies "idiopathic" and "chronic" to differentiate from acute or secondary gout.
• Verify the affected joint is the "left hip" and that "tophus" or "tophi" are present.
• Do not use this code for gout without tophi or for gout affecting other joints.