ICD-10 Code H47.642 – Disorders of Visual Cortex in (Due to) Vascular Disorders, Left Side of Brain (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H47.642 – Disorders of visual cortex in (due to) vascular disorders, left side of brain
What it is
This code identifies a visual cortex disorder caused by a vascular condition affecting the left side of the brain. Use it when the record links the visual problem to a left-sided cerebrovascular process.
Clinical signs
Findings may include visual field loss, impaired visual processing, or other cortical visual deficits. Clinical features vary; refer to documentation and imaging or neurologic assessment when available.
When to use this code
Use this code when the provider documents a disorder of the visual cortex due to vascular disease on the left side of the brain. It fits cases such as stroke-related cortical visual impairment or other documented vascular injury affecting visual pathways. If the laterality or vascular cause is unclear, check documentation.
Do not use for
Do not use it for eye disorders, optic nerve disease, or nonspecific visual complaints without a documented cortical vascular cause. Do not assign it when the brain side or vascular etiology is not supported.
Coding tip
Confirm both the vascular cause and left-sided brain involvement before assigning H47.642.