ICD-10 Code I70.1 – Atherosclerosis of renal artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.1 – Atherosclerosis of renal artery
What it is
I70.1 identifies atherosclerotic narrowing or hardening of one or both renal arteries. Use it when documentation states renal artery atherosclerosis as the cause of reduced blood flow to the kidneys.
Clinical signs
Clinical features vary; refer to documentation. Patients may have evidence of renal artery disease on imaging, reduced kidney perfusion, or associated renovascular hypertension. Confirm that the provider links the finding to atherosclerosis.
When to use this code
Use this code when the record specifically documents atherosclerosis of the renal artery, with or without renal artery stenosis. It is appropriate for unilateral or bilateral disease if the provider does not specify a different site or more detailed diagnosis. If the chart only notes renal artery narrowing, check documentation before coding.
Do not use for
Do not use I70.1 for nonatherosclerotic renal artery disorders, such as fibromuscular dysplasia or embolic disease. Also avoid it when renal artery stenosis is mentioned without clear documentation of atherosclerosis.
Coding tip
Match the code to the provider’s exact wording and supporting imaging, and query if the cause of renal artery disease is not stated.