ICD-10 Code I70.299 – Other atherosclerosis of native arteries of extremities, unspecified extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.299 – Other atherosclerosis of native arteries of extremities, unspecified extremity
What it is
This code identifies atherosclerosis in a native artery of an extremity when the affected limb is not specified. It is used when documentation supports peripheral arterial plaque disease but does not name the exact arm or leg.
Clinical signs
Clinical features vary; refer to documentation. Common findings in peripheral arterial disease may include diminished pulses, limb pain with activity, coldness, or nonhealing wounds, but the record must support the diagnosis and the unspecified extremity.
When to use this code
Use I70.299 when the provider documents other atherosclerosis of a native artery in an extremity and does not identify which extremity is affected. It also fits when the chart confirms peripheral arterial atherosclerotic disease, but the site detail is incomplete. Check documentation if laterality or a more specific artery is recorded.
Do not use for
Do not use this code for atherosclerosis of bypass grafts, aneurysms, or embolic arterial disease. If the provider specifies a different extremity or a more precise arterial site, choose the more specific code.
Coding tip
Query the provider when the extremity is missing, because laterality or site specificity may change the code selection.