Retrobulbar neuritis, left eye

This code signifies inflammation of the optic nerve located behind the eyeball in the left eye. This condition can lead to sudden vision loss, pain with eye movement, and changes in color perception. It is often associated with demyelinating diseases like multiple sclerosis.

Use this code when documentation clearly indicates a diagnosis of retrobulbar neuritis affecting the left eye. This diagnosis is typically supported by ophthalmological examination findings, such as optic disc pallor or swelling, visual field defects, and patient-reported symptoms.

• Ensure laterality is explicitly documented as "left eye" to support this specific code.
• Distinguish from optic neuritis (H46.0-) where the inflammation is visible on the optic disc.
• Consider co-reporting with codes for underlying conditions, such as multiple sclerosis (G35), if documented.