ICD-10 Code I77.7 – Other arterial dissection (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I77.7 – Other arterial dissection
What it is
I77.7 identifies a dissection in an artery other than the aorta or a specifically named vessel. It means blood has tracked into the arterial wall, creating a separation that may narrow flow.
Clinical signs
Clinical features vary; refer to documentation. Patients may present with sudden pain, ischemic symptoms, or findings from imaging that show an arterial wall tear or false lumen.
When to use this code
Use I77.7 when the provider documents an arterial dissection and the vessel is not classified elsewhere. It is appropriate when imaging or operative notes confirm a dissection, but the record does not name a more specific arterial site. Check documentation if the vessel location is unclear.
Do not use for
Do not use this code for aortic dissection or for dissections assigned to a more specific code. Do not use it when the record only mentions suspected dissection without confirmation.
Coding tip
Code the most specific arterial site available, and use I77.7 only when no more precise diagnosis is documented.