2027 ICD-10-CM Diagnosis Code H52.521Paresis of accommodation, right eye

ICD-10-CM Codes›H00–H59›H49-H52›H52

ICD-10-CM H52.521
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H52.521 is a billable ICD-10-CM diagnosis code for paresis of accommodation, right eye. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 124 through 125. Coders also document this condition as right cycloplegia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Refractive error.

Code Identity

ICD-10-CM Code
H52.521
Billable Status
Yes — Valid for Submission
Code Describes
Paresis of accommodation, right eye
Short Description
Paresis of accommodation, right eye
Same as the full description in the CMS dataset.
Parent Code
H52.52
Paresis of accommodation

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 CodeH52.521Paresis of accommodation, right eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Right cycloplegia

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H52.521: 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.

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 H52.521 to ICD-9-CMHistory

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

ICD-9-CM
367.51 Paresis of accommodation
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 H52.521Overview

What is the ICD-10 code for paresis of accommodation, right eye?

The ICD-10-CM code for paresis of accommodation, right eye is H52.521 (sometimes written as H52521). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H52.521 (Paresis of accommodation) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report paresis of accommodation, right eye on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H52.521 group to?

When paresis of accommodation, right eye is the principal diagnosis on an inpatient stay, it groups to MS-DRG 125, 124, with relative weights from 0.7699 to 1.2470 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H52.521?

Under the General Equivalence Mappings, paresis of accommodation, right eye converts to ICD-9-CM 367.51 (paresis of accommodation). The mapping is approximate, so confirm the match fits the documentation.