H49.1

Non-billable

Fourth [trochlear] nerve palsy

H49.1 is the ICD-10-CM code for Fourth [trochlear] nerve palsy. It is a non-billable category code — use a more specific child code such as H49.10 for billing.

Status
Header (non-billable)
Chapter
H00-H59
Parent
H49
Subcodes
4
Edition
FY2026

H00-H59 Diseases of the eye and adnexa

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code H49.1?
H49.1 is the ICD-10-CM code for "Fourth [trochlear] nerve palsy". It falls under H00-H59 Diseases of the eye and adnexa.
Is H49.1 a billable code?
No — H49.1 is a non-billable header code. Use a more specific child code (such as H49.10) for billing.
What are the subcodes of H49.1?
H49.1 has 4 more specific child codes, including H49.10, H49.11, H49.12.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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