ICD-10 Code I70.242 – Atherosclerosis of native arteries of left leg with ulceration of calf (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.242 – Atherosclerosis of native arteries of left leg with ulceration of calf
What it is
This code identifies atherosclerosis affecting the native arteries of the left leg, with an ulcer located on the calf. It indicates peripheral arterial disease with tissue breakdown on the same side.
Clinical signs
Typical findings include reduced arterial blood flow, leg pain with walking, cool skin, diminished pulses, or delayed wound healing. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents atherosclerosis in the native arteries of the left leg and specifically links it to an ulcer of the calf. The ulcer location must be documented as the calf, and laterality must be left.
Choose this code when the record supports both the arterial disease and the ulcer site. If the ulcer is present but the artery condition is not specified, or the side is not documented, check documentation before assigning the code.
Do not use for
Do not use this code for ulcers without documented atherosclerosis, or for disease in the right leg or unspecified limb. Check documentation if the ulcer site is not the calf.
Coding tip
Verify laterality, native artery involvement, and exact ulcer location before coding, because each element changes code selection.