ICD-10 Code I70.243 – Atherosclerosis of native arteries of left leg with ulceration of ankle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.243 – Atherosclerosis of native arteries of left leg with ulceration of ankle
What it is
This code identifies atherosclerosis in the native arteries of the left leg with an ulcer located at the ankle. Use it when documentation links the arterial disease to a left ankle ulcer.
Clinical signs
Clinical features may include peripheral arterial disease findings such as reduced limb perfusion, diminished pulses, cool skin, or delayed wound healing. Clinical features vary; refer to documentation.
When to use this code
Use I70.243 when the provider documents atherosclerosis affecting native arteries of the left leg and specifically states ulceration of the ankle. The record should support both the arterial disease and the ulcer location.
Apply this code when the ulcer is part of the documented atherosclerotic condition, not when the ulcer is unrelated or the side is unspecified. Check documentation if laterality, vessel type, or ulcer site is unclear.
Do not use for
Do not use this code for ulcers without documented atherosclerosis, or for disease in the right leg or unspecified limb. Do not use if the ulcer is on a different site than the ankle.
Coding tip
Verify laterality, native artery involvement, and the exact ulcer location before assigning the code.