ICD-10 Code H53.46 – Homonymous Bilateral Field Defects (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H53.46 – Homonymous bilateral field defects
What it is
H53.46 identifies a visual field loss affecting the same side of the field in both eyes. It usually reflects damage behind the optic chiasm, such as in the optic tract, radiations, or occipital cortex.
Clinical signs
Patients may report missing the right or left half of their vision in both eyes. Formal visual field testing typically confirms a homonymous defect; clinical features vary, so refer to documentation.
When to use this code
Use this code when the record documents a homonymous hemianopic or quadrantanopic field defect, or another bilateral field loss of the same side. Code the condition only when the provider clearly links the visual field defect to the encounter. Check documentation if the laterality or type of field loss is unclear.
Do not use for
Do not use H53.46 for nonspecific blurred vision, monocular vision loss, or refractive problems. If the chart describes a different visual disturbance without a documented homonymous field defect, choose the more accurate code.
Coding tip
Verify that the defect is homonymous and bilateral before assigning H53.46.