I77.75
BillableDissection of other precerebral arteries
HCC Category Mapping
V24HCC 107 — Vascular Disease with Complications
0.450ESRDHCC 107 — Vascular Disease with Complications
0.000What This Code Means
A tear in the inner lining of blood vessels in the neck or head that supply the brain (excluding the carotid and vertebral arteries). This tear can cause blood to leak into the vessel wall, potentially blocking blood flow to the brain.
Coding Tips
- •Verify the specific precerebral artery involved (such as basilar, anterior cerebral, or middle cerebral artery) and ensure the dissection is not of the carotid or vertebral arteries, which have separate codes
- •Determine if the dissection is spontaneous or traumatic, and whether it resulted in cerebral infarction or other complications, as these may require additional codes
Clinical Significance
Dissection of other precerebral arteries encompasses dissections of arteries supplying the brain other than the carotid and vertebral arteries, such as the basilar artery origin. These dissections carry significant stroke risk and require urgent evaluation and management. The condition reflects high clinical complexity and resource needs for neurological monitoring and intervention.
Documentation Requirements
- ✓Imaging confirmation of the precerebral artery dissection
- ✓Identification of the specific precerebral artery involved
- ✓Neurological assessment documenting presence or absence of ischemic symptoms
- ✓Etiology — spontaneous, traumatic, or related to connective tissue disorder
- ✓Treatment plan including anticoagulation or antiplatelet therapy
- ✓Follow-up imaging and monitoring schedule
Excludes 2 — Not included here, may code separately
Commonly Confused Codes
I77.71 — Dissection of carotid artery: use when carotid is specifically documentedI77.74 — Dissection of vertebral artery: use when vertebral artery is specifically documentedI67.0 — Dissection of cerebral arteries: for intracranial arteries, not precerebralI77.70 — Dissection of unspecified artery: less specific option
Code Hierarchy
└I77Other disorders of arteries and arterioles└I77.7Other arterial dissection└I77.75Dissection of other precerebral arteries
└I77.75Dissection of other precerebral arteries