Drug-induced chronic gout, unspecified hip, with tophus

This code signifies a chronic form of gout that has been triggered or exacerbated by medication, affecting an unspecified hip joint. The presence of tophi, which are deposits of uric acid crystals, confirms the chronic and advanced nature of the condition. This diagnosis indicates persistent inflammation and structural changes within the hip due to drug-induced hyperuricemia.

Apply this code when documentation clearly states chronic gout of the hip, explicitly linked to a drug, and confirms the presence of tophi. This is appropriate for patients presenting with chronic hip pain, swelling, and imaging or clinical findings consistent with tophaceous gout, where a medication is identified as the causative agent. Physician documentation must specify the drug-induced etiology and the presence of tophi.

• Ensure documentation specifies "drug-induced" and "chronic" gout, as well as the presence of "tophi."
• Do not use this code for acute drug-induced gout or chronic gout without tophi; separate codes exist for those presentations.
• Always sequence the drug-induced gout code first, followed by an external cause code (T36-T50) to identify the specific drug responsible, if known and documented.