Lead-induced chronic gout, multiple sites, with tophus

This code signifies a chronic inflammatory arthritis caused by elevated lead levels, affecting multiple joints, and characterized by the presence of visible or palpable urate crystal deposits (tophi). It indicates a persistent form of gout where lead exposure is the underlying etiology.

Use this code when documentation clearly states chronic gout with multiple joint involvement and tophi, explicitly linking the condition to lead toxicity. Supporting documentation would include a history of lead exposure, elevated blood lead levels, and clinical findings consistent with chronic tophaceous gout.

• Ensure documentation specifies "chronic" gout and "multiple sites" in addition to "tophus."
• Do not use this code for acute gout or gout without tophi, even if lead-induced.
• Sequence this code after any codes for the specific lead poisoning if still active, or as a primary diagnosis if the lead-induced gout is the primary reason for the encounter.