ICD-10-CM Code H50.9

Unspecified strabismus

Version 2021 Billable Code

Valid for Submission

H50.9 is a billable code used to specify a medical diagnosis of unspecified strabismus. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions. The ICD-10-CM code H50.9 might also be used to specify conditions or terms like a pattern strabismus, congenital ectopic pupil, congenital pes cavus, congenital strabismus, converge in manifest squint, fusion intersection of vis axes, convergence in manifest squint, etc

Short Description:Unspecified strabismus
Long Description:Unspecified strabismus

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code H50.9 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • A pattern strabismus
  • Congenital ectopic pupil
  • Congenital pes cavus
  • 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
  • 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
  • Mehes syndrome
  • O/E - strabismus - squint
  • Ocular convergence - finding
  • Ptosis, strabismus, ectopic pupil 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

Clinical Information

  • 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

Diagnostic Related Groups

The ICD-10 code H50.9 is grouped in the following groups for version MS-DRG V38.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2020 through 09/30/2021.


Convert H50.9 to ICD-9

  • 378.9 - Eye movemnt disorder NOS (Approximate Flag)

Code Classification

  • Diseases of the eye and adnexa (H00–H59)
    • Disorders of ocular muscles, binocular movement, accommodation and refraction (H49-H52)
      • Other strabismus (H50)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Information for Patients

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.

There are many kinds of eye movement disorders. Two common ones are

  • Strabismus - a disorder in which the two eyes don't line up in the same direction. This results in "crossed eyes" or "walleye."
  • Nystagmus - fast, uncontrollable movements of the eyes, sometimes called "dancing eyes"

Some eye movement disorders are present at birth. Others develop over time and may be associated with other problems, such as injuries. Treatments include glasses, patches, eye muscle exercises, and surgery. There is no cure for some kinds of eye movement disorders, such as most kinds of nystagmus.

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  • Cranial mononeuropathy VI (Medical Encyclopedia)
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  • Strabismus (Medical Encyclopedia)
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