ICD-10 Code H53.43 – Sector or arcuate defects (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H53.43 – Sector or arcuate defects
What it is
H53.43 identifies a localized visual field defect shaped like a sector or arc. You use it when the record describes a partial field loss in this pattern, not a complete blindness diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Records may note a sector-shaped or arcuate visual field defect on exam or perimetry, with corresponding loss in a defined part of the visual field.
When to use this code
Use this code when the provider documents a sector or arcuate defect affecting vision and does not assign a more specific underlying eye disorder. It may appear in ophthalmology notes tied to visual field testing or follow-up of a known defect. Check whether the cause is documented elsewhere and should be coded separately.
Do not use for
Do not use H53.43 for general blurred vision, complete visual loss, or unspecified visual disturbance. If the chart names a different visual field pattern or a specific underlying condition, code that diagnosis instead.
Coding tip
Match the code to the exact wording in the ophthalmology note or visual field report, and check documentation for any underlying eye disease.