2020 ICD-10-CM Diagnosis Code H46.9

Unspecified optic neuritis

    2016 2017 2018 2019 2020 Billable/Specific Code
  • H46.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM H46.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of H46.9 - other international versions of ICD-10 H46.9 may differ.
The following code(s) above H46.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to H46.9:
  • H00-H59
    2020 ICD-10-CM Range H00-H59

    Diseases of the eye and adnexa

    Note
    • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury (trauma) of eye and orbit (S05.-)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
    Diseases of the eye and adnexa
  • H46
    ICD-10-CM Diagnosis Code H46

    Optic neuritis

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • ischemic optic neuropathy (H47.01-)
    • neuromyelitis optica [Devic] (G36.0)
    Optic neuritis
Approximate Synonyms
  • Bilateral optic neuritis
  • Bilateral optic neuropathy
  • Left optic neuritis
  • Left optic neuropathy
  • Optic neuritis
  • Right optic neuritis
  • Right optic neuropathy
Clinical Information
  • A disorder characterized by inflammation of the optic nerve. Causes include autoimmune disorders, infections, toxins, drugs, and multiple sclerosis. It may manifest with acute loss of vision and pain.
  • Inflammation of the optic nerve. Commonly associated conditions include autoimmune disorders such as multiple sclerosis, infections, and granulomatous diseases. Clinical features include retro-orbital pain that is aggravated by eye movement, loss of color vision, and contrast sensitivity that may progress to severe visual loss, an afferent pupillary defect (marcus-gunn pupil), and in some instances optic disc hyperemia and swelling. Inflammation may occur in the portion of the nerve within the globe (neuropapillitis or anterior optic neuritis) or the portion behind the globe (retrobulbar neuritis or posterior optic neuritis).
  • Inflammation of the second cranial nerve or optic nerve; commonly associated conditions include autoimmune disorders such as multiple sclerosis, infections, and granulomatous diseases.
  • What: optic neuritis. Optic neuritis: the inflammation, degeneration, or demyelination of the optic nerve. Why: optic neuritis may be present in patients with sarcoidosis or reiter's syndrome (rarely). How: clinically, patients with optic neuritis present with sudden loss of central vision and pain on moving the eye. Opthalmoscopically there may be hyperemia of the optic disc and distention of the large retinal veins. At later stages the disk margins are blurred and may be slightly elevated simulating papilledema. Refs: vaugn, d and asbury, t: general ophthamology, 8th edition, 1977.
ICD-10-CM H46.9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 123 Neurological eye disorders

Convert H46.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to H46.9:
  • Neuritis (rheumatoid) M79.2
    ICD-10-CM Diagnosis Code M79.2

    Neuralgia and neuritis, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Type 1 Excludes
    • optic (nerve) (hereditary) (sympathetic) H46.9

ICD-10-CM Codes Adjacent To H46.9
H46.02 …… left eye
H46.03 …… bilateral
H46.1 Retrobulbar neuritis
H46.10 …… unspecified eye
H46.11 …… right eye
H46.12 …… left eye
H46.13 …… bilateral
H46.2 Nutritional optic neuropathy
H46.3 Toxic optic neuropathy
H46.8 Other optic neuritis
H46.9 Unspecified optic neuritis
H47 Other disorders of optic [2nd] nerve and visual pathways
H47.0 Disorders of optic nerve, not elsewhere classified
H47.01 Ischemic optic neuropathy
H47.011 …… right eye
H47.012 …… left eye
H47.013 …… bilateral
H47.019 …… unspecified eye
H47.02 Hemorrhage in optic nerve sheath
H47.021 …… right eye
H47.022 …… left eye

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.