H46.9 Unspecified optic neuritis

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from H46 Optic neuritis

Excludes2 (not included here)

• ischemic optic neuropathy (H47.01-)
• neuromyelitis optica [Devic] (G36.0)

MS-DRG index

Defines the logic of DRG(s) 123 in MDC 02.

Approximate ICD-9-CM (GEMs)

• 377.30 Optic neuritis, unspecified

Code annotations containing back-references to H46.9

Back-references to H46

• Type 1 Excludes: G36.0 Neuromyelitis optica [Devic] ("optic neuritis NOS (H46)")
• Type 2 Excludes: G52 Disorders of other cranial nerves ("disorders of optic [2nd] nerve (H46, H47.0)")

Diagnosis Index entries for H46.9

• Neuritis (rheumatoid) › optic (nerve) (hereditary) (sympathetic)

Nearby codes

• H46.12 Retrobulbar neuritis, left eye
• H46.13 Retrobulbar neuritis, bilateral
• H46.2 Nutritional optic neuropathy
• H46.3 Toxic optic neuropathy
• H46.8 Other optic neuritis
• H46.9 Unspecified optic neuritis (this code)