Drug-induced chronic gout, unspecified site, with tophus

This code signifies a chronic inflammatory arthritis caused by the accumulation of uric acid crystals in joints and soft tissues, specifically induced by medication, and characterized by the presence of visible or palpable tophi. The exact anatomical location of the gout is not specified.

Use this code when documentation clearly indicates chronic gout directly resulting from drug therapy, and the presence of tophaceous deposits is noted. This diagnosis requires a physician's statement linking the gout to a specific medication and confirming chronicity and tophi.

• Ensure documentation explicitly states "drug-induced" and "chronic" gout, along with the presence of "tophus" or "tophi."
• Do not use this code if the gout is acute, not drug-induced, or if tophi are absent; consider codes within M10.- for other forms of gout.
• Always sequence this code after the code for the adverse effect of the drug (T36-T50 with a 5th or 6th character of 5) if the drug is still being administered or was recently discontinued.