Lead-induced chronic gout, unspecified hand, with tophus

This code signifies a persistent form of gout caused by lead exposure, specifically affecting an unspecified hand and characterized by the presence of tophi. Tophi are visible or palpable deposits of monosodium urate crystals, indicating advanced or poorly controlled gout. The chronic nature implies ongoing or recurrent inflammatory arthritis.

Apply this code when documentation clearly links chronic gout in the hand to lead toxicity, and tophaceous deposits are noted. This diagnosis requires a history of lead exposure and clinical or imaging evidence of tophi in the hand. Use when the specific hand (left or right) is not documented.

• Ensure documentation explicitly states "lead-induced" and "chronic" gout, along with "tophus" or "tophi" in the hand.
• Do not use if the gout is acute, not lead-induced, or if tophi are absent.
• Requires an additional code to identify the specific type of lead poisoning (e.g., T56.0X1-).