Idiopathic chronic gout, unspecified site, with tophus

This code signifies a diagnosis of chronic gout where the underlying cause is unknown (idiopathic), characterized by the presence of tophi (deposits of uric acid crystals). The specific anatomical location of the gout or tophi is not documented or specified.

Use this code when the medical record clearly states idiopathic chronic gout with tophi, but the physician has not identified or documented the specific joint or site affected. Documentation must confirm the chronic nature of the gout and the presence of tophaceous deposits.

• Ensure documentation explicitly states "idiopathic" and "chronic" gout with "tophus" or "tophi."
• Avoid this code if a specific anatomical site of the gout is documented; instead, use a more specific M1A.0 code.
• Do not use for acute gout attacks or chronic gout without tophi.