Disorders of ocular muscles, binocular movement, accommodation and refraction (H49-H52) ICD-10-CM
The H49–H52 section covers disorders of ocular muscles, binocular movement, accommodation and refraction with 203 ICD-10-CM diagnosis codes, of which 150 are billable in fiscal year 2026. The section is organized into the 4 code ranges listed below.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- nystagmus and other irregular eye movements H55
Code Ranges in This Section 4 ranges · 203 codes
| Code Range | Title | Codes | Billable |
|---|---|---|---|
| H49 | Paralytic strabismus (H49) | 38 | 29 |
| H50 | Other strabismus (H50) | 104 | 75 |
| H51 | Other disorders of binocular movement (H51) | 12 | 9 |
| H52 | Disorders of refraction and accommodation (H52) | 49 | 37 |
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the H49–H52 Code Range
ICD-10 codes H49-H52 cover disorders affecting eye muscle control, binocular vision, and focusing ability. These codes are used to classify conditions like paralytic and other strabismus types, abnormalities in ocular muscle movement, and refractive or accommodation disorders.
This range includes H49 codes for various forms of paralytic strabismus caused by nerve palsies such as third (oculomotor), fourth (trochlear), and sixth (abducent) nerve palsies, with detailed options specifying laterality and syndrome variants like Kearns-Sayre syndrome. H50 codes address other strabismus forms including esotropia and exotropia, alternating patterns, vertical strabismus, mechanical entrapments of specific eye muscles, and syndromes like Duane's syndrome. H51 codes focus on disorders of binocular eye movement like palsy of conjugate gaze, convergence insufficiency or excess, internuclear ophthalmoplegia, and other specified or unspecified binocular movement disorders. Lastly, H52 codes are for refractive errors and accommodation issues such as hypermetropia (farsightedness), myopia (nearsightedness), astigmatism (irregular or regular), anisometropia, presbyopia, and accommodation spasms or paresis. Using synonyms such as "third cranial nerve palsy" for H49.0 or "monocular exotropia" for H50.11 helps medical coders accurately navigate specific subcategories when documenting these eye conditions.
Questions About This Page
How many codes are in the H49-H52 range?
The H49-H52 range contains 203 ICD-10-CM diagnosis codes in FY 2026. 150 of them are billable, and the rest are category headers that organize the section.
What conditions does H49-H52 cover?
The range covers disorders of ocular muscles, binocular movement, accommodation and refraction. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
