ICD-10 Code I70.233 – Atherosclerosis of native arteries of right leg with ulceration of ankle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.233 – Atherosclerosis of native arteries of right leg with ulceration of ankle
What it is
This code identifies atherosclerosis in the native arteries of the right leg when it is complicated by an ulcer at the ankle. It tells you the disease is in the patient’s own arteries, not a bypass graft or other vessel type.
Clinical signs
Typical findings include peripheral arterial disease with poor blood flow to the right lower extremity and an ulcer located at the ankle. Clinical features vary; refer to documentation for laterality, ulcer site, and whether the ulcer is arterial in origin.
When to use this code
Use this code when the record documents atherosclerosis of the native arteries in the right leg and a concurrent ankle ulcer. The ulcer location should be clearly stated, and the right-sided arterial disease must be specified. If the chart does not confirm these details, check documentation before coding.
Do not use for
Do not use this code for ulcers without documented atherosclerosis, or for disease in the left leg or unspecified limb. It is also not appropriate for graft vessel disease or for ulcers at other sites.
Coding tip
Verify both laterality and ulcer location in the note before assigning I70.233.