Diagnosis Code

H49.1 FOURTH [TROCHLEAR] NERVE PALSY


Code Information

Diagnosis Code: H49.1

Short Description: Fourth [trochlear] nerve palsy

Long Description: Fourth [trochlear] nerve palsy

The code H49.1 is NOT VALID for claim submission

Code Classification:

  • Diseases of the eye and adnexa (H00–H59)
    • Disorders of ocular muscles, binocular movement, accommodation and refraction (H49-H52)
      • Paralytic strabismus (H49)
        • H49.1 Fourth [trochlear] nerve palsy

Code Version: 2022 ICD-10-CM


Similar Codes

ICD-10 Code ICD-10 Description
H49 Paralytic strabismus
H49.0 Third [oculomotor] nerve palsy
H49.00 Third [oculomotor] nerve palsy, unspecified eye
H49.01 Third [oculomotor] nerve palsy, right eye
H49.02 Third [oculomotor] nerve palsy, left eye
H49.03 Third [oculomotor] nerve palsy, bilateral
H49.10 Fourth [trochlear] nerve palsy, unspecified eye
H49.11 Fourth [trochlear] nerve palsy, right eye
H49.12 Fourth [trochlear] nerve palsy, left eye
H49.13 Fourth [trochlear] nerve palsy, bilateral
H49.2 Sixth [abducent] nerve palsy
H49.20 Sixth [abducent] nerve palsy, unspecified eye
H49.21 Sixth [abducent] nerve palsy, right eye
H49.22 Sixth [abducent] nerve palsy, left eye
H49.23 Sixth [abducent] nerve palsy, bilateral
H49.3 Total (external) ophthalmoplegia
H49.30 Total (external) ophthalmoplegia, unspecified eye
H49.31 Total (external) ophthalmoplegia, right eye
H49.32 Total (external) ophthalmoplegia, left eye
H49.33 Total (external) ophthalmoplegia, bilateral
H49.4 Progressive external ophthalmoplegia
H49.40 Progressive external ophthalmoplegia, unspecified eye
H49.41 Progressive external ophthalmoplegia, right eye
H49.42 Progressive external ophthalmoplegia, left eye
H49.43 Progressive external ophthalmoplegia, bilateral
H49.8 Other paralytic strabismus
H49.81 Kearns-Sayre syndrome
H49.811 Kearns-Sayre syndrome, right eye
H49.812 Kearns-Sayre syndrome, left eye
H49.813 Kearns-Sayre syndrome, bilateral
H49.819 Kearns-Sayre syndrome, unspecified eye
H49.88 Other paralytic strabismus
H49.881 Other paralytic strabismus, right eye
H49.882 Other paralytic strabismus, left eye
H49.883 Other paralytic strabismus, bilateral
H49.889 Other paralytic strabismus, unspecified eye
H49.9 Unspecified paralytic strabismus


This page was last updated on: 10/1/2023