Lead-induced gout, left knee

This code signifies an inflammatory arthritis affecting the left knee, specifically caused by elevated lead levels in the body. Lead-induced gout results from lead interfering with uric acid excretion, leading to crystal deposition in joints. The left knee is the primary site of manifestation in this particular diagnosis.

Use this code when documentation clearly indicates a diagnosis of gout in the left knee, and a direct causal link to lead exposure or lead poisoning is established. This diagnosis typically follows laboratory confirmation of hyperuricemia and elevated blood lead levels, along with clinical signs of gouty arthritis.

• Ensure documentation explicitly states "lead-induced" and specifies the "left knee" as the affected joint.
• Always code the underlying lead poisoning (e.g., T56.0X1-) as a primary or secondary diagnosis, depending on the circumstances.
• Differentiate from other forms of gout (e.g., idiopathic, drug-induced) where lead is not the causative agent.