ICD-10 Code H46.10 – Retrobulbar neuritis, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H46.10 – Retrobulbar neuritis, unspecified eye
What it is
H46.10 identifies retrobulbar neuritis affecting an unspecified eye. Use it when the record documents optic nerve inflammation behind the globe, but does not specify right or left eye.
Clinical signs
Typical findings include decreased visual acuity, pain with eye movement, and reduced color vision. Clinical features vary; refer to documentation.
When to use this code
Use this code when the clinician documents retrobulbar neuritis and laterality is not stated. It also fits notes that mention optic neuritis behind the eye without naming the affected side. If the record is unclear, check documentation before assigning a code.
Do not use for
Do not use this code when the eye is specified as right or left, because a laterality-specific code may apply. Do not use it for other causes of vision loss or optic nerve disorders unless retrobulbar neuritis is documented.
Coding tip
Always look for laterality in the assessment, imaging report, or ophthalmology note before defaulting to an unspecified-eye code.