H49.12Billable
Fourth [trochlear] nerve palsy, left eye
- Chapter
- 7. Diseases of the eye and adnexa
- Category
- H49
- Effective date
- October 1, 2026
Related codes in category H49
H49Paralytic strabismusH49.0Third [oculomotor] nerve palsyH49.00Third [oculomotor] nerve palsy, unspecified eyeYesH49.01Third [oculomotor] nerve palsy, right eyeYesH49.02Third [oculomotor] nerve palsy, left eyeYesH49.03Third [oculomotor] nerve palsy, bilateralYesH49.1Fourth [trochlear] nerve palsyH49.10Fourth [trochlear] nerve palsy, unspecified eyeYesH49.11Fourth [trochlear] nerve palsy, right eyeYesH49.13Fourth [trochlear] nerve palsy, bilateralYesH49.2Sixth [abducent] nerve palsyH49.20Sixth [abducent] nerve palsy, unspecified eyeYes
Frequently asked questions
What is ICD-10 code H49.12?
H49.12 is an ICD-10-CM diagnosis code for Fourth [trochlear] nerve palsy, left eye.
Is H49.12 a billable code?
Yes. H49.12 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is H49.12 in?
H49.12 falls under Chapter 7: Diseases of the eye and adnexa.
When did H49.12 become effective?
H49.12 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to H49.12?
H49.12 belongs to category H49, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.