ICD-10 Code H54.42 – Blindness, left eye, normal vision right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H54.42 – Blindness, left eye, normal vision right eye
What it is
Use this code for documented blindness in the left eye when the right eye has normal vision. It describes a unilateral, complete loss of vision on the left side.
Clinical signs
Typical findings include absent or no light perception in the left eye, with preserved normal vision in the right eye. Clinical features vary; refer to documentation.
When to use this code
Assign this code when the record clearly states blindness of the left eye and normal vision in the right eye. Use it for congenital or acquired loss only if the documentation supports the laterality and vision status. Check documentation if severity is unclear.
Do not use for
Do not use it for partial vision loss, low vision, or unspecified visual impairment. Also avoid it when the chart does not confirm normal vision in the right eye.
Coding tip
Verify both laterality and the vision status of the other eye before coding H54.42.