2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 123. 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H52.512: its own notes plus those printed at block H49-H52 and Chapter 7. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block H49-H52 Disorders of ocular muscles, binocular movement, accommodation and refraction applies to 150 codes
  • nystagmus and other irregular eye movements (H55)
From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury (trauma) of eye and orbit (S05.-)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)

Notes

General instructions on how these codes are used.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name H52.512, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming H52.512: its condition is not part of those codes, and both may be reported when the patient has both.

  • H49 Paralytic strabismus
    internal ophthalmoplegia (H52.51-) names H52.51-, which includes this code

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About H52.512Overview

What is the ICD-10 code for internal ophthalmoplegia (complete) (total), left eye?

The ICD-10-CM code for internal ophthalmoplegia (complete) (total), left eye is H52.512 (sometimes written as H52512). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

What MS-DRG does H52.512 group to?

When internal ophthalmoplegia (complete) (total), left eye is the principal diagnosis on an inpatient stay, it groups to MS-DRG 123 (neurological Eye Disorders), which carries a relative weight of 0.8218. Higher weights mean higher Medicare reimbursement.

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.