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ICD-10-CM 2027

ICD-10 code for Internuclear ophthalmoplegia

H51.2

Internuclear ophthalmoplegia

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Ophthalmoplegia › internuclear”. Page updated September 29, 2026.

About coding Internuclear ophthalmoplegia

The ICD-10-CM code for Internuclear ophthalmoplegia is H51.2 (Internuclear ophthalmoplegia).

Within H51 (other disorders of binocular movement), H51.2 is specifically for Internuclear ophthalmoplegia. Related codes cover palsy (spasm) of conjugate gaze (H51.0), Convergence insufficiency and excess (H51.1), other specified disorders of binocular movement (H51.8) and unspecified disorder of binocular movement (H51.9).

To report this condition, pick the subcode that matches the documentation: H51.20 (unspecified eye), H51.21 (right eye), H51.22 (left eye) and H51.23 (bilateral).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Common questions about Internuclear ophthalmoplegia ICD-10 codes

What is the ICD-10 code for Internuclear ophthalmoplegia?

H51.2 — Internuclear ophthalmoplegia (a header code; report a more specific subcode).

Is H51.2 billable?

No. H51.2 is a header code. Report one of its more specific subcodes instead.