Other disorders of binocular movement (H51) ICD-10-CM
The H51 code range covers other disorders of binocular movement with 12 ICD-10-CM diagnosis codes. 9 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the H51 Range 12 codes · 9 billable
- H51 Other disorders of binocular movementNon-billable
- H51.0 Palsy (spasm) of conjugate gaze
- H51.1 Convergence insufficiency and excessNon-billable
- H51.11 Convergence insufficiency
- H51.12 Convergence excess
- H51.2 Internuclear ophthalmoplegiaNon-billable
- H51.20 Internuclear ophthalmoplegia, unspecified eye
- H51.21 Internuclear ophthalmoplegia, right eye
- H51.22 Internuclear ophthalmoplegia, left eye
- H51.23 Internuclear ophthalmoplegia, bilateral
- H51.8 Other specified disorders of binocular movement
- H51.9 Unspecified disorder of binocular movement
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the H51 range.
Facial Paralysis
Severe or complete loss of facial muscle motor function. This condition may result from central or peripheral lesions. Damage to CNS motor pathways from the cerebral cortex to the facial nuclei in the pons leads to facial weakness that generally spares the forehead muscles. FACIAL NERVE DISEASES generally results in generalized hemifacial weakness. NEUROMUSCULAR JUNCTION DISEASES and MUSCULAR DISEASES may also cause facial paralysis or paresis.
Synkinesis
An involuntary movement accompanying a volitional movement. It often refers to facial movements that accompany FACIAL PARALYSIS.
About the H51 Code Range
The ICD-10 code section H51 represents other disorders of binocular movement, which are conditions affecting how both eyes work together to move in coordination. These codes are used when diagnosing specific problems with eye movement such as gaze palsies, convergence issues, and internuclear ophthalmoplegia.
This section includes codes for varied binocular movement disorders. For example, H51.0 covers palsy of conjugate gaze, also known by many terms like dysconjugate gaze, horizontal or vertical gaze palsies, and Parinaud's syndrome. Codes H51.11 and H51.12 address convergence insufficiency and convergence excess, indicating difficulty focusing both eyes together, commonly referred to as convergence palsy or spasm. The H51.2 series specifies internuclear ophthalmoplegia, a disorder impairing coordinated eye movement due to nerve pathway damage, often called dissociated gaze palsy. Other specified and unspecified binocular movement disorders fall under codes like H51.8 and H51.9, which describe various abnormal eye movement patterns and anomalies of the vergence system that affect binocular vision.
Questions About This Page
How many billable codes are in the H51 range?
Of the 12 codes in this range, 9 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the H51 range classify?
The range classifies other disorders of binocular movement. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
