Idiopathic chronic gout, right ankle and foot, w/o tophus

This code signifies a chronic inflammatory arthritis caused by uric acid crystal deposition, specifically affecting the right ankle and foot, without the presence of visible or palpable tophi. The "idiopathic" designation indicates that the underlying cause of the elevated uric acid levels is unknown. This condition leads to recurrent episodes of pain, swelling, and tenderness in the affected joint.

Use this code for patients diagnosed with chronic gout where the etiology is not secondary to another condition or medication, and the right ankle and/or foot is the primary site of involvement. Documentation should clearly state "idiopathic chronic gout" affecting the right ankle and/or foot, and explicitly note the absence of tophi. This code is appropriate for ongoing management of chronic gout without acute flares.

• Ensure documentation specifies "idiopathic" and "chronic" to differentiate from acute or secondary gout.
• Verify the absence of tophi; if tophi are present, a different subcategory of M1A.07 will be required.
• Laterality is crucial; confirm the right ankle and/or foot is documented as the affected site.