2027 ICD-10-CM Diagnosis Code H49.32Total (external) ophthalmoplegia, left eye

ICD-10-CM Codes›H00–H59›H49-H52›H49

ICD-10-CM H49.32
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H49.32 is a billable ICD-10-CM diagnosis code for total (external) ophthalmoplegia, 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 external ophthalmoplegia of left eye. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neuro-ophthalmology and Strabismus.

Code Identity

ICD-10-CM Code
H49.32
Billable Status
Yes — Valid for Submission
Code Describes
Total (external) ophthalmoplegia, left eye
Short Description
Total (external) ophthalmoplegia, left eye
Same as the full description in the CMS dataset.
Parent Code
H49.3
Total (external) ophthalmoplegia

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH49-H52Disorders of ocular muscles, binocular movement, accommodation and refraction
CategoryH49Paralytic strabismus
This CodeH49.32Total (external) ophthalmoplegia, left eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • External ophthalmoplegia of left eye
  • Total ophthalmoplegia
  • Total ophthalmoplegia of left eye

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H49.32: its own notes plus those printed at H49, 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 H49 Paralytic strabismus applies to 29 codes
  • internal ophthalmoplegia (H52.51-)
  • internuclear ophthalmoplegia (H51.2-)
  • progressive supranuclear ophthalmoplegia (G23.1)
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.

Clinical ClassificationClinical

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

CCSR EYE006
Neuro-ophthalmology
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR EYE007
Strabismus
Default principal diagnosis: inpatient No · outpatient No

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 H49.32 to ICD-9-CMHistory

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

ICD-9-CM
378.56 Total ophthalmoplegia
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 H49.32Overview

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

The ICD-10-CM code for total (external) ophthalmoplegia, left eye is H49.32 (sometimes written as H4932). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H49.32 (Total (external) ophthalmoplegia) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report total (external) ophthalmoplegia, left eye on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H49.32 group to?

When total (external) ophthalmoplegia, 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 H49.32?

Under the General Equivalence Mappings, total (external) ophthalmoplegia, left eye converts to ICD-9-CM 378.56 (total ophthalmoplegia). The mapping is approximate, so confirm the match fits the documentation.