ICD-10-CM > H00-H59 > H46-H47 > H46 > H46.1 H46.1 Retrobulbar neuritis Non-Billable/Non-Specific Applicable To Retrobulbar neuritis NOS Type 1 Excludes syphilitic retrobulbar neuritis (A52.15) Codes H46.10Retrobulbar neuritis, unspecified eyeH46.11Retrobulbar neuritis, right eyeH46.12Retrobulbar neuritis, left eyeH46.13Retrobulbar neuritis, bilateral