ICD-10 Code H52.3 – Anisometropia and aniseikonia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H52.3 – Anisometropia and aniseikonia
What it is
H52.3 identifies a refractive difference between the two eyes, with or without image-size mismatch. Use it when the record documents anisometropia, aniseikonia, or both as the reason for the eye visit.
Clinical signs
Common findings include unequal refractive error between eyes, blurred vision, eyestrain, or difficulty with binocular vision. Clinical features vary; refer to documentation.
When to use this code
Use H52.3 when the provider clearly documents anisometropia or aniseikonia as the diagnosis. It may appear in ophthalmology or optometry notes when the condition is being evaluated, monitored, or corrected with lenses. Code the documented condition, not the visual complaint alone.
Do not use for
Do not use this code for nonspecific blurred vision, routine refraction only, or other refractive errors that are separately documented. Check documentation if the note does not clearly state anisometropia or aniseikonia.
Coding tip
Match the code to the exact eye diagnosis wording; if only symptoms are recorded, you need more specific documentation.