ICD-10 Code I77.79 – Dissection of other specified artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I77.79 – Dissection of other specified artery
What it is
This code identifies a tear within the wall of an artery not otherwise specified in the ICD-10-CM listing. Blood can separate the vessel layers and create a false channel.
Clinical signs
Clinical features vary; refer to documentation. Commonly, arterial dissection is confirmed by imaging and may be described with pain, ischemia, or reduced blood flow in the affected territory.
When to use this code
Use I77.79 when the provider documents dissection of an artery that is not named by a more specific ICD-10 code. It may apply when imaging or operative notes identify the vessel but the record does not support a more specific site.
Do not use for
Do not use this code for aortic dissection or for dissections with a more specific artery code. Check documentation if the vessel is named elsewhere or if the record only describes aneurysm, stenosis, or occlusion.
Coding tip
Code the specific artery whenever documentation allows; use I77.79 only when the dissection is documented but no more precise artery code applies.