ICD-10 Code I77.6 – Arteritis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I77.6 – Arteritis, unspecified
What it is
I77.6 identifies arteritis when the inflamed artery is not otherwise specified. Use it for documented arterial inflammation without a more precise type, site, or cause.
Clinical signs
Clinical features vary; refer to documentation. Commonly, records may note vessel inflammation, localized pain, tenderness, reduced blood flow, or imaging findings suggesting arteritis.
When to use this code
Use this code when the provider documents arteritis but does not name a specific arteritis subtype, such as temporal or giant cell arteritis. It also fits cases where the affected artery or etiology is not stated. If the note gives a more specific diagnosis, code that instead.
Do not use for
Do not use I77.6 for arteritis with a clearly documented specific type, location, or cause. Check documentation if the record instead describes atherosclerosis, vasculitis, or another vascular disorder.
Coding tip
Query the provider when arteritis is mentioned without detail, because specificity may change the code selection.