ICD-10 Code: H49.1 – Fourth [trochlear] nerve palsy

ICD-10 code H49.1 corresponds to Fourth [trochlear] nerve palsy. This code is classified under the chapter H49 Paralytic strabismus, which is part of the H49-H52: Disorders of ocular muscles, binocular movement, accommodation and refraction category.

The parent chapter is Diseases of the eye and adnexa.