ICD-10 Code I70.222 – Atherosclerosis of native arteries of extremities with rest pain, left leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.222 – Atherosclerosis of native arteries of extremities with rest pain, left leg
What it is
This code describes atherosclerotic narrowing or blockage in the native arteries of the left leg, with pain present at rest. It indicates chronic peripheral arterial disease affecting blood flow to the limb.
Clinical signs
Typical findings include ischemic rest pain, often worse when the leg is elevated or at night, and relief when the limb is dependent. Clinical features vary; refer to documentation.
When to use this code
Use I70.222 when the record documents atherosclerosis in the native arteries of the left lower extremity and specifically notes rest pain. You should code this when the provider identifies the left leg as the affected side and the condition is not described as graft-related. If the laterality or presence of rest pain is unclear, check documentation.
Do not use for
Do not use this code for atherosclerosis without rest pain, or when the disease involves bypass grafts or other non-native vessels. Do not assign it if the left-sided involvement is not documented.
Coding tip
Verify both laterality and “rest pain” in the note before assigning I70.222.