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

This code signifies a chronic form of gout where the underlying cause is unknown (idiopathic), specifically affecting the left hand. The presence of tophi, which are deposits of uric acid crystals, indicates advanced or long-standing disease. This condition is characterized by recurrent inflammatory arthritis and joint damage.

Apply this code when documentation clearly states idiopathic chronic gout involving the left hand, and specifically mentions the presence of tophaceous deposits. This is appropriate for patients presenting with chronic pain, swelling, and visible or palpable tophi in the left hand, without an identifiable secondary cause for their hyperuricemia.

• Ensure documentation specifies "idiopathic" and "chronic" to differentiate from acute or secondary gout.
• Laterality is crucial; confirm the left hand is explicitly documented.
• The presence of tophi must be clearly stated; do not assume if not documented.