ICD-10 Code I77.8 – Other specified disorders of arteries and arterioles (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I77.8 – Other specified disorders of arteries and arterioles
What it is
This code captures arterial or arteriolar disorders that are documented, but do not fit a more specific ICD-10 category. Use it when the provider identifies a particular vessel disorder and no exact named diagnosis is available.
Clinical signs
Clinical features vary; refer to documentation. Findings may include vessel narrowing, abnormal arterial structure, or other localized arterial abnormalities noted on imaging, exam, or specialist assessment.
When to use this code
Use I77.8 when the record clearly describes an artery or arteriole disorder that is not indexed elsewhere. It is appropriate for nonspecific but documented conditions involving these vessels. If the note names a more specific diagnosis, code that condition instead.
Do not use for
Do not use this code for generalized atherosclerosis, vasculitis, or aneurysm when a more specific code is documented. Check documentation if the disorder is better described by another vascular category.
Coding tip
Confirm the provider has documented an arterial or arteriolar disorder before assigning I77.8.