ICD-10 Code I70.231 – Atherosclerosis of native arteries of right leg with ulceration of thigh (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.231 – Atherosclerosis of native arteries of right leg with ulceration of thigh
What it is
This code identifies atherosclerosis in the native arteries of the right leg when it causes an ulcer on the thigh. Use it when the documentation links the ulcer to arterial disease in the right lower extremity.
Clinical signs
Typical findings include peripheral arterial disease with poor blood flow, a nonhealing ulcer, and signs of ischemia in the affected limb. Clinical features vary; refer to documentation.
When to use this code
Use I70.231 when the provider documents atherosclerosis of native arteries in the right leg and specifies ulceration of the thigh. The record should support both the arterial disease and the ulcer location. If the ulcer cause is unclear, check documentation before coding.
Do not use for
Do not use this code for ulcers from venous, diabetic, pressure, or traumatic causes unless arterial atherosclerosis is specifically documented as the cause. Do not use it if the ulcer is on a different site.
Coding tip
Verify laterality and ulcer location carefully, because this code is specific to the right leg and thigh.