ICD-10 Code I70.50 – Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.50 – Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities
What it is
This code identifies atherosclerosis affecting a nonautologous biological bypass graft in an arm or leg, without further detail about the graft site or severity. Use it when the record states graft atherosclerosis but does not specify more detail.
Clinical signs
Clinical features vary; refer to documentation. Findings may include reduced graft patency, diminished distal pulses, or ischemic symptoms in the affected extremity when the graft is narrowed by atherosclerotic change.
When to use this code
Use I70.50 when the provider documents atherosclerosis of a nonautologous biological bypass graft in an extremity and does not name a more specific code. It also fits when the graft is described as diseased or narrowed from atherosclerosis, but laterality, graft type detail, or limb-specific specificity is absent. Check documentation if the record suggests another peripheral arterial disease code.
Do not use for
Do not use this code for native artery atherosclerosis, graft occlusion from another cause, or atherosclerosis of autologous vein grafts. If the chart does not clearly identify a nonautologous biological bypass graft, check documentation.
Coding tip
Confirm the graft is biological and nonautologous before assigning I70.50.