H46.9
ICD-10-CMThis code represents inflammation of the optic nerve without a more specific etiology or location identified. It indicates a general diagnosis of optic nerve inflammation affecting vision, where the underlying cause or precise type of neuritis is not yet determined or documented.
Use this code when the medical record documents optic neuritis but lacks further specificity regarding its cause (e.g., infectious, demyelinating, ischemic) or laterality. This code is appropriate for initial encounters or when diagnostic workup is incomplete, and a more precise diagnosis cannot be assigned.
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