Lead-induced chronic gout, right knee, without tophus

This code signifies chronic inflammatory arthritis affecting the right knee, specifically caused by lead toxicity. It indicates the absence of tophi, which are characteristic urate crystal deposits, despite the chronic nature of the gout.

Apply this code when documentation confirms a diagnosis of chronic gout in the right knee, directly attributed to lead exposure. Supporting clinical notes should detail the presence of lead poisoning and its causal link to the patient's gout symptoms in the specified joint.

• Ensure documentation explicitly states "lead-induced" and specifies the "right knee" as the affected joint.
• Verify the absence of tophi; if present, a different code would be required.
• Always sequence a code for lead poisoning (e.g., T56.0X1- or T56.0X2-) as a primary or secondary diagnosis to fully capture the etiology.