2026 ICD-10-CM Diagnosis Code H50.012Monocular esotropia, left eye

ICD-10-CM Codes›H00–H59›H49-H52›H50

ICD-10-CM H50.012
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H50.012 is a billable ICD-10-CM diagnosis code for monocular esotropia, left eye. 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. Coders also document this condition as acquired esotropia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Strabismus.

Code Identity

ICD-10-CM Code
H50.012
Billable Status
Yes — Valid for Submission
Code Describes
Monocular esotropia, left eye
Short Description
Monocular esotropia, left eye
Same as the full description in the CMS dataset.
Parent Code
H50.01
Monocular esotropia

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH49-H52Disorders of ocular muscles, binocular movement, accommodation and refraction
CategoryH50Other strabismus
This CodeH50.012Monocular esotropia, left eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired esotropia
  • Infantile esotropia
  • Infantile esotropia of left eye
  • Monocular esotropia of left eye

Clinical ClassificationClinical

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

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

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 H50.012 to ICD-9-CMHistory

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

ICD-9-CM
378.01 Monocular esotropia
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 H50.012Overview

Is H50.012 (Monocular esotropia) a billable code?

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

What MS-DRG does H50.012 group to?

When monocular esotropia, left eye 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 H50.012?

Under the General Equivalence Mappings, monocular esotropia, left eye converts to ICD-9-CM 378.01 (monocular esotropia). 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.