ICD-10 Code I70.55 – Atherosclerosis of nonautologous biological bypass graft(s) of other extremity with ulceration (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.55 – Atherosclerosis of nonautologous biological bypass graft(s) of other extremity with ulceration
What it is
This code identifies atherosclerotic narrowing or blockage in a nonautologous biological bypass graft in an extremity other than the leg or arm specifically, with an associated ulcer. Use it when the graft is the documented site of disease.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include reduced graft patency, impaired blood flow to the limb, and a nonhealing ulcer attributed to the graft-related arterial disease.
When to use this code
Use I70.55 when the provider documents atherosclerosis affecting a nonautologous biological bypass graft in another extremity and also documents ulceration. The ulcer must be linked to the graft disease in the record. If the graft type, limb site, or ulcer relationship is unclear, check documentation.
Do not use for
Do not use this code for atherosclerosis without ulceration, or when the disease involves a different bypass graft type or a different extremity category. Do not assume the ulcer is related unless the record states it.
Coding tip
Verify the graft material, extremity site, and explicit ulcer association before assigning I70.55.