ICD-10 Code H54.42A3 – Blindness left eye category 3, normal vision right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H54.42A3 – Blindness left eye category 3, normal vision right eye
What it is
This code identifies severe vision loss in the left eye with normal vision in the right eye. It is used when the left eye meets category 3 blindness criteria and the other eye has normal vision.
Clinical signs
Findings usually show profound left-eye visual impairment, often with very limited or no useful vision. The right eye is documented as normal; clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly states blindness in the left eye and normal vision in the right eye. It may appear in ophthalmology notes, problem lists, or referral documentation. Confirm laterality and vision category before assigning it.
Do not use for
Do not use it if the left eye has partial vision loss rather than blindness, or if the right eye is also impaired. Check documentation when laterality or severity is unclear.
Coding tip
Verify both eye-specific vision findings and the blindness category; if the note does not specify them, query the provider.