ICD-10 Code I70.261 – Atherosclerosis of native arteries of extremities with gangrene, right leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.261 – Atherosclerosis of native arteries of extremities with gangrene, right leg
What it is
This code identifies atherosclerosis in the native arteries of the right leg when gangrene is present. It means blood flow is severely reduced enough to cause tissue death.
Clinical signs
Typical findings include ischemic pain, cool or pale skin, weak pulses, and black or necrotic tissue in the right leg. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents atherosclerosis affecting native arteries of the right lower extremity with gangrene. You should also confirm that the right leg is the affected site and that gangrene is specifically documented.
Apply it when the clinician links the gangrene to peripheral arterial disease or atherosclerotic disease in the native vessels. Check documentation if laterality, vessel type, or the presence of gangrene is unclear.
Do not use for
Do not use it for atherosclerosis without gangrene, or when the disease involves grafts or bypass vessels instead of native arteries. Check documentation if the side is not right leg.
Coding tip
Verify both laterality and the presence of gangrene before assigning I70.261.