2026 ICD-10-CM Diagnosis Code H50.9Unspecified strabismus

ICD-10-CM Codes›H00–H59›H49-H52›H50

ICD-10-CM H50.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H50.9 is a billable ICD-10-CM diagnosis code for unspecified strabismus. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Strabismus.

Code Identity

ICD-10-CM Code
H50.9
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified strabismus
Short Description
Unspecified strabismus
Same as the full description in the CMS dataset.
Parent Code
H50
Other strabismus

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH49-H52Disorders of ocular muscles, binocular movement, accommodation and refraction
CategoryH50Other strabismus
This CodeH50.9Unspecified strabismus

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • A pattern strabismus
  • Abnormal blue sclerae
  • Anterior maxillary protrusion, strabismus, intellectual disability syndrome
  • Blue nevus of skin
  • Congenital anomaly of sclera
  • Congenital ectopic pupil
  • Congenital pes cavus
  • Congenital prognathism
  • Congenital strabismus
  • Converge in manifest squint, fusion intersection of vis axes
  • Convergence in manifest squint
  • Convergence in manifest squint,anomalous with constant angle
  • Convergence manifest squint,diverge intersection of vis axes
  • Crowding of teeth
  • Direction of squint
  • Disjunctive ocular movements - finding
  • Ectopic pupil
  • Finding of ocular balance
  • Hemifacial hyperplasia
  • Hemifacial hyperplasia strabismus syndrome
  • Hypertelorism
  • Hypotropia
  • Intellectual disability with strabismus syndrome
  • Lambda pattern strabismus
  • Long face syndrome
  • Maxillary jaw size anomaly
  • Maxillary prognathism
  • Mehes syndrome
  • Mongolian spot
  • Ocular convergence - finding
  • Open bite
  • Ptosis, strabismus, ectopic pupil syndrome
  • Severe growth deficiency, strabismus, extensive dermal melanocytosis, intellectual disability syndrome
  • Severe hypotonia, psychomotor developmental delay, strabismus, cardiac septal defect syndrome
  • Severe intellectual disability, hypotonia, strabismus, coarse face, planovalgus syndrome
  • Severe intellectual disability, poor language, strabismus, grimacing face, long fingers syndrome
  • Speech delay
  • Strabismus
  • Strabismus following cataract surgery
  • Strabismus following ocular surgery
  • Strabismus following retinal surgery
  • Telecanthus
  • Telecanthus, hypertelorism, strabismus, pes cavus syndrome
  • Vertical maxillary excess

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Imbalance
      • eye muscle NOS
    • Insufficiency, insufficient
      • muscle
        • ocular NEC
    • Strabismus(congenital) (nonparalytic)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR EYE007
Strabismus
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Esotropia

    a form of ocular misalignment characterized by an excessive convergence of the visual axes, resulting in a cross-eye appearance. an example of this condition occurs when paralysis of the lateral rectus muscle causes an abnormal inward deviation of one eye on attempted gaze.

  • Exotropia

    a form of ocular misalignment where the visual axes diverge inappropriately. for example, medial rectus muscle weakness may produce this condition as the affected eye will deviate laterally upon attempted forward gaze. an exotropia occurs due to the relatively unopposed force exerted on the eye by the lateral rectus muscle, which pulls the eye in an outward direction.

  • Strabismus

    misalignment of the visual axes of the eyes. in comitant strabismus the degree of ocular misalignment does not vary with the direction of gaze. in noncomitant strabismus the degree of misalignment varies depending on direction of gaze or which eye is fixating on the target. (miller, walsh & hoyt's clinical neuro-ophthalmology, 4th ed, p641)

  • Hypertelorism

    abnormal increase in the interorbital distance due to overdevelopment of the lesser wings of the sphenoid.

  • Open Bite

    a condition in which certain opposing teeth fail to establish occlusal contact when the jaws are closed.

  • Mongolian Spot

    a bluish-gray to gray-brown benign, melanocytic nevus found usually in the lumbosacral region of dark-skinned people, especially those of east asian ancestry. it is usually congenital or appears shortly after birth, and disappears in childhood.

  • Lumbosacral Region

    region of the back including the lumbar vertebrae, sacrum, and nearby structures.

Patient EducationClinical

Eye Movement Disorders

When you look at an object, you're using several muscles to move both eyes to focus on it. If you have a problem with the muscles, the eyes don't work properly.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert H50.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
378.9 Eye movemnt disorder NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H50.9Overview

Is H50.9 (Other strabismus) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified strabismus on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H50.9 group to?

When unspecified strabismus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H50.9?

Under the General Equivalence Mappings, unspecified strabismus converts to ICD-9-CM 378.9 (eye movemnt disorder NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.