H49.2

Clinical Information

• A disorder characterized by involvement of the abducens nerve sixth cranial nerve).

• A non-neoplastic or neoplastic disorder affecting the abducens nerve sixth cranial nerve).

• Diseases of the sixth cranial abducens) nerve or its nucleus in the pons. The nerve may be injured along its course in the pons, intracranially as it travels along the base of the brain, in the cavernous sinus, or at the level of superior orbital fissure or orbit. Dysfunction of the nerve causes lateral rectus muscle weakness, resulting in horizontal diplopia that is maximal when the affected eye is abducted and esotropia. Common conditions associated with nerve injury include intracranial hypertension; craniocerebral trauma; ischemia; and infratentorial neoplasms.

Details

• H49.2 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.

• The 2023 edition of ICD-10-CM H49.2 became effective on October 1, 2022.

• This is the American ICD-10-CM version of H49.2 – other international versions of ICD-10 H49.2 may differ.