ICD-10 Code I70.331 – Atherosclerosis of unspecified type of bypass graft(s) of the right leg with ulceration of thigh (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.331 – Atherosclerosis of unspecified type of bypass graft(s) of the right leg with ulceration of thigh
What it is
This code identifies atherosclerotic narrowing or blockage in an unspecified bypass graft in the right leg, with an associated ulcer on the thigh. Use it when the record links the graft disease to ulceration in that location.
Clinical signs
Findings may include poor limb perfusion, graft-related ischemic changes, and a nonhealing thigh ulcer. Clinical features vary; refer to documentation for the graft type, laterality, and ulcer relationship.
When to use this code
Use I70.331 when the provider documents atherosclerosis affecting an unspecified bypass graft in the right leg and specifies ulceration of the thigh. The ulcer must be part of the documented condition, not coded separately without support. If the graft type or ulcer details are unclear, check documentation.
Do not use for
Do not use this code for native-vessel peripheral arterial disease without a bypass graft. Do not assign it if the ulcer is on a different site or if the record does not confirm atherosclerosis.
Coding tip
Verify the bypass graft laterality and ulcer location before coding, and use the most specific documented vascular term available.