ICD-10 Code I77.89 – Other specified disorders of arteries and arterioles (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I77.89 – Other specified disorders of arteries and arterioles
What it is
I77.89 identifies arterial or arteriolar disorders that are documented but do not fit a more specific ICD-10-CM code. Use it for a named vascular abnormality when the record gives enough detail, but no better code applies.
Clinical signs
Clinical features vary; refer to documentation. Findings may include abnormal arterial structure or function, localized vascular disease, or other specified vessel changes noted on imaging, exam, or specialist assessment.
When to use this code
Use this code when the clinician documents a specific disorder of an artery or arteriole and no more precise code exists in the chart. It is appropriate when the condition is clearly vascular, but the exact subtype is not separately coded. Check documentation for the named diagnosis and site.
Do not use for
Do not use I77.89 for conditions that have a more specific ICD-10-CM code, or for nonspecific symptoms without a documented arterial disorder. Check documentation if the record instead describes atherosclerosis, aneurysm, or another defined vascular disease.
Coding tip
Assign the most specific vascular code available first; use I77.89 only when the provider’s wording supports an “other specified” arterial or arteriolar disorder.