ICD-10 Code I70.523 – Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with rest pain, bilateral legs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.523 – Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with rest pain, bilateral legs
What it is
This code identifies atherosclerotic narrowing or blockage in a nonautologous biological bypass graft in both legs, with pain present at rest. It reflects graft disease rather than native artery disease.
Clinical signs
Typical findings include ischemic rest pain, often worse at night or when the legs are elevated, and evidence of impaired blood flow in both lower extremities. Clinical features vary; refer to documentation.
When to use this code
Use I70.523 when the provider documents atherosclerosis affecting a nonautologous biological bypass graft in both legs and specifically notes rest pain. The record should support bilateral involvement and graft-related disease. If the laterality, graft type, or symptom is unclear, check documentation before assigning the code.
Do not use for
Do not use this code for atherosclerosis of native arteries, other bypass graft types, or disease limited to one leg. It is also not appropriate if rest pain is not documented.
Coding tip
Verify both the graft type and the bilateral rest-pain documentation before coding, because these details determine the correct I70.523 assignment.