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 | |