Lead-induced chronic gout, unsp ankle and foot, w/o tophus

This code signifies chronic gout that is specifically caused by lead exposure, affecting an unspecified ankle or foot joint, and notably presenting without the presence of tophi. It indicates a persistent inflammatory arthritis due to uric acid crystal deposition, where the etiology is directly linked to lead toxicity.

Use this code when documentation clearly states chronic gout in the ankle or foot, explicitly attributes the gout to lead poisoning, and confirms the absence of tophaceous deposits. This diagnosis requires a history of lead exposure and clinical findings consistent with chronic gout in the specified location.

• Ensure documentation specifies "chronic" gout and explicitly links it to "lead-induced" etiology.
• Verify that the medical record confirms the absence of tophi; if tophi are present, a different code would be appropriate.
• Do not use this code if the affected ankle/foot joint is specified (e.g., right ankle); instead, select a more specific anatomical site code.