Drug-induced chronic gout, unspecified shoulder, with tophus

This code signifies chronic gout that has been induced by medication, specifically affecting an unspecified shoulder joint, and characterized by the presence of tophi. Tophi are deposits of uric acid crystals that form under the skin or in joints, indicating long-standing or severe hyperuricemia. The drug-induced nature differentiates it from primary or secondary gout.

Use this code when documentation clearly states chronic gout of the shoulder, explicitly links its etiology to a specific drug, and confirms the presence of tophaceous deposits. This typically applies to patients with a history of medication use (e.g., diuretics, aspirin) contributing to hyperuricemia and subsequent chronic gouty arthritis with visible or palpable tophi in the shoulder.

• Ensure documentation specifies "chronic" gout and explicitly states "drug-induced" rather than idiopathic or other secondary causes.
• Verify the presence of "tophi" as this is a specific inclusion in the code description.
• Do not use this code if the laterality of the shoulder (right or left) is documented; more specific codes exist for specified shoulders.