ICD-10 Code H46.13 – Retrobulbar neuritis, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H46.13 – Retrobulbar neuritis, bilateral
What it is
H46.13 identifies inflammation or dysfunction of the optic nerve behind both eyes. Use it when documentation specifically states bilateral retrobulbar neuritis or optic neuritis affecting both optic nerves.
Clinical signs
Typical findings include decreased visual acuity, pain with eye movement, and reduced color vision. Clinical features vary; refer to documentation, especially when laterality and optic nerve involvement are clearly stated.
When to use this code
Use H46.13 when the provider documents bilateral retrobulbar neuritis, including bilateral optic neuritis described as retrobulbar. It is appropriate for confirmed diagnoses in outpatient, inpatient, or specialist notes. If the record does not specify bilateral involvement, check documentation before coding.
Do not use for
Do not use this code for unilateral retrobulbar neuritis or for vague visual complaints without a documented diagnosis. Check documentation if the note refers to optic neuropathy, papilledema, or another eye disorder instead.
Coding tip
Confirm both laterality and the exact optic nerve diagnosis in the provider note before assigning H46.13.