Lead-induced chronic gout, unspecified wrist, with tophus

This code signifies a chronic inflammatory arthritis caused by lead toxicity, specifically affecting an unspecified wrist joint. The presence of tophi, which are subcutaneous or intra-articular deposits of monosodium urate crystals, is a key feature of this diagnosis.

Use this code when documentation clearly indicates chronic gout attributed to lead exposure, with evidence of tophaceous deposits in an unspecified wrist. This diagnosis requires a confirmed history of lead exposure and clinical findings consistent with chronic gout.

• Ensure documentation specifies "chronic" gout and explicitly links it to "lead-induced" etiology.
• Confirm the presence of "tophus" or "tophi" in the medical record.
• If the specific wrist (right or left) is documented, a more specific code from the M1A.13 category should be used.