ICD-10 Code I70.531 – Atherosclerosis of nonautologous biological bypass graft(s) of the right leg with ulceration of thigh (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.531 – Atherosclerosis of nonautologous biological bypass graft(s) of the right leg with ulceration of thigh
What it is
This code identifies atherosclerosis affecting a nonautologous biological bypass graft in the right leg, with an ulcer present on the thigh. Use it when the record links the graft disease and the ulceration in that location.
Clinical signs
Clinical features vary; refer to documentation. Typical records may note reduced graft patency or peripheral arterial disease findings, plus a documented ulcer of the thigh on the right leg.
When to use this code
Use this code when the provider documents atherosclerosis in a nonautologous biological bypass graft of the right leg and specifies ulceration of the thigh. The ulcer location must be stated, and the laterality must match the right leg. Check documentation if the graft type or ulcer site is unclear.
Do not use for
Do not use this code for ulcers without documented atherosclerosis of the bypass graft, or for disease in a different limb. If the graft is autologous, synthetic, or the ulcer is in another site, choose a different code.
Coding tip
Verify three elements in the note: graft type, right-sided location, and thigh ulceration.