1. H46 Optic neuritis

    Excludes2

    • ischemic optic neuropathy (H47.01-)
    • neuromyelitis optica [Devic] (G36.0)
    1. H46.0 Optic papillitis

      1. H46.00 Optic papillitis, unspecified eye

      2. H46.01 Optic papillitis, right eye

      3. H46.02 Optic papillitis, left eye

      4. H46.03 Optic papillitis, bilateral

    2. H46.1 Retrobulbar neuritis

      Inclusion term(s):

      • Retrobulbar neuritis NOS
      1. H46.10 Retrobulbar neuritis, unspecified eye

      2. H46.11 Retrobulbar neuritis, right eye

      3. H46.12 Retrobulbar neuritis, left eye

      4. H46.13 Retrobulbar neuritis, bilateral

    3. H46.2 Nutritional optic neuropathy

    4. H46.3 Toxic optic neuropathy

    5. H46.8 Other optic neuritis

    6. H46.9 Unspecified optic neuritis

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.