Drug-induced gout, unspecified ankle and foot

This code signifies an inflammatory arthritis caused by medication, specifically affecting an unspecified ankle or foot. It indicates the presence of gout symptoms (e.g., pain, swelling, redness) in the lower extremity, directly attributable to a prescribed or illicit drug.

Apply this code when documentation clearly links gout in the ankle or foot to a specific drug, and the laterality (right or left) is not specified. This typically occurs when a patient presents with acute gout flares following initiation or dosage change of a medication known to induce hyperuricemia.

• Ensure documentation explicitly states "drug-induced" and specifies the ankle/foot as the affected site.
• Avoid using this code if the gout is idiopathic or due to other secondary causes; use appropriate codes from the M10.0- or M10.1- series instead.
• Always sequence the drug-induced gout code first, followed by an external cause code (T36-T50) to identify the specific drug responsible.