Idiopathic gout, unspecified ankle and foot

This code signifies a form of arthritis characterized by sudden, severe attacks of pain, redness, and tenderness in a joint, specifically when the cause is unknown (idiopathic) and affects an unspecified ankle or foot. It indicates the presence of gout without an identifiable secondary cause.

Use this code when documentation confirms a diagnosis of idiopathic gout affecting an ankle or foot, but the specific ankle (left or right) is not documented. This code is appropriate when the physician explicitly states "idiopathic gout" and the affected site is generally described as "ankle and foot" without further laterality.

• Avoid using this code if the laterality (left or right ankle/foot) is specified in the medical record; instead, select a more specific code.
• Ensure the documentation clearly states "idiopathic" or implies no secondary cause for the gout.
• Consider sequencing this code after codes for acute gouty arthritis if the current encounter is for an acute flare.