ICD-10 Code I70.209 – Unspecified atherosclerosis of native arteries of extremities, unspecified extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.209 – Unspecified atherosclerosis of native arteries of extremities, unspecified extremity
What it is
This code identifies atherosclerosis in a native artery of an arm or leg when the affected extremity is not specified. It is used when documentation confirms peripheral arterial plaque disease but does not name the limb.
Clinical signs
Clinical features may include diminished pulses, limb pain with walking, cool skin, or poor circulation findings. Clinical features vary; refer to documentation.
When to use this code
Use I70.209 when the provider documents atherosclerosis of a native extremity artery but does not specify right or left, upper or lower limb. It also fits when the record identifies peripheral arterial disease in a native vessel without further detail. If laterality or vessel site is documented, code more specifically.
Do not use for
Do not use this code for atherosclerosis of bypass grafts, stents, or other nonnative vessels. Do not use it when the chart clearly identifies a specific extremity or another vascular disorder; check documentation.
Coding tip
Assign the most specific laterality and vessel code available; use I70.209 only when the extremity remains unspecified.