2026 ICD-10-CM Diagnosis Code H52.512Internal ophthalmoplegia (complete) (total), left eye

ICD-10-CM Codes›H00–H59›H49-H52›H52

ICD-10-CM H52.512
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H52.512 is a billable ICD-10-CM diagnosis code for internal ophthalmoplegia (complete) (total), left eye. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as internal ophthalmoplegia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Refractive error.

Code Identity

ICD-10-CM Code
H52.512
Billable Status
Yes — Valid for Submission
Code Describes
Internal ophthalmoplegia (complete) (total), left eye
Short Description
Internal ophthalmoplegia (complete) (total), left eye
Same as the full description in the CMS dataset.
Parent Code
H52.51
Internal ophthalmoplegia (complete) (total)

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH49-H52Disorders of ocular muscles, binocular movement, accommodation and refraction
CategoryH52Disorders of refraction and accommodation
This CodeH52.512Internal ophthalmoplegia (complete) (total), left eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Internal ophthalmoplegia
  • Left cycloplegia
  • Left oculomotor nerve palsy
  • Left total internal ophthalmoplegia
  • Total internal ophthalmoplegia

Clinical ClassificationClinical

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

CCSR EYE009
Refractive error
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 H52.512 to ICD-9-CMHistory

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

ICD-9-CM
367.52 Tot intern ophthalmopleg
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 H52.512Overview

Is H52.512 (Internal ophthalmoplegia (complete) (total)) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report internal ophthalmoplegia (complete) (total), left eye on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of H52.512?

Under the General Equivalence Mappings, internal ophthalmoplegia (complete) (total), left eye converts to ICD-9-CM 367.52 (tot intern ophthalmopleg). 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.