ICD-10 Code I72.5 – Aneurysm of other precerebral arteries (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I72.5 – Aneurysm of other precerebral arteries
What it is
This code identifies an aneurysm in a precerebral artery other than the carotid or vertebral vessels. It means a localized abnormal dilation of one of the arteries supplying the brain before they enter the skull.
Clinical signs
Clinical features vary; refer to documentation. These aneurysms may be found on imaging after headache, neurologic symptoms, or an incidental vascular study finding. Rupture or compression findings should be documented if present.
When to use this code
Use I72.5 when the provider documents an aneurysm in a specified precerebral artery that is not otherwise classified as carotid or vertebral. It also fits imaging-confirmed cases when the record names an “other precerebral artery” aneurysm. Check documentation if the vessel site is unclear or if the aneurysm is traumatic, dissecting, or postoperative.
Do not use for
Do not use this code for aneurysms of the carotid or vertebral arteries, or for intracranial aneurysms. If the record describes a different vascular bed or a dissection rather than a true aneurysm, code the documented condition instead.
Coding tip
Confirm the exact artery named in the report; “precerebral” alone is not enough if a more specific site is documented.