ICD-10 Code H54.42A5 – Blindness left eye category 5, normal vision right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H54.42A5 – Blindness left eye category 5, normal vision right eye
What it is
This code identifies total blindness in the left eye with normal vision in the right eye. Use it when documentation specifies category 5 vision loss in the left eye and intact vision on the right.
Clinical signs
Clinical features vary; refer to documentation. The record should support no useful vision in the left eye, with the right eye described as normal or unaffected.
When to use this code
Use H54.42A5 when the provider documents unilateral blindness limited to the left eye and confirms normal vision in the right eye. It is appropriate for ophthalmology notes, problem lists, and encounters that specifically state category 5 vision loss.
Check documentation if the chart only says low vision, visual impairment, or blindness without laterality. You need clear evidence that the left eye is blind and the right eye has normal vision.
Do not use for
Do not use this code for bilateral blindness, unspecified visual loss, or reduced vision that does not meet category 5. Do not assign it when laterality or right-eye status is missing.
Coding tip
Verify both laterality and the right-eye vision status in the assessment before coding.