Retrobulbar neuritis, bilateral

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

Apply this code when documentation clearly indicates retrobulbar neuritis impacting both the left and right optic nerves. This diagnosis is typically made based on ophthalmological examination findings, patient symptoms, and sometimes imaging studies like MRI.

• Ensure documentation specifies "bilateral" involvement; otherwise, use a more specific unilateral code if only one eye is affected.
• Always sequence this code after the underlying cause if known (e.g., multiple sclerosis).
• Distinguish from optic neuritis (H46.0-) which does not specify the retrobulbar location.