ICD-10 Code H53.47 – Heteronymous Bilateral Field Defects (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H53.47 – Heteronymous bilateral field defects
What it is
H53.47 identifies a visual field defect affecting both eyes in opposite halves of the field. It usually reflects damage along the visual pathways rather than a problem limited to the eye itself.
Clinical signs
Patients may report missing side vision, bumping into objects, or difficulty reading depending on the pattern. Clinical features vary; refer to documentation.
When to use this code
Use H53.47 when the record documents a heteronymous bilateral field defect, such as a bitemporal or binasal field loss. Code it when the provider identifies the visual field pattern and does not assign a more specific underlying diagnosis. Check documentation if the cause is known.
Do not use for
Do not use this code for unilateral visual loss, nonspecific blurred vision, or eye disease without a documented field defect. If the chart describes another visual pathway disorder, choose the documented condition instead.
Coding tip
Verify that the note names a heteronymous field defect, not just reduced vision, before assigning H53.47.