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H49.1 - Fourth [trochlear] nerve palsy


The ICD 10 Code for Fourth [trochlear] nerve palsy is listed as H49.1.
Additional information concerning this code and description can be found below including ICD 9 crosswalks / GEMS, chapter information, and DRGs where available.

ICD 10 CM Field Value
Diagnosis Code: H49.1
Description: Fourth [trochlear] nerve palsy
Chapter Diseases of the eye and adnexa (H00-H59)
Block Disorders of ocular muscles, binocular movement, accommodation and refraction (H49-H52)
Parent H49 - Paralytic strabismus
ICD-10-CM Children (deeper level / typically more specific) of H49.1:
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
ICD-10-CM Siblings (same level / similar specificity) of H49.1:
H49.0 - Third [oculomotor] nerve palsy
H49.2 - Sixth [abducent] nerve palsy
H49.3 - Total (external) ophthalmoplegia
H49.4 - Progressive external ophthalmoplegia
H49.8 - Other paralytic strabismus
H49.9 - Unspecified paralytic strabismus