2026 ICD-10-CM Diagnosis Code H26.31Drug-induced cataract, right eye

ICD-10-CM Codes›H00–H59›H25-H28›H26

ICD-10-CM H26.31
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H26.31 is a billable ICD-10-CM diagnosis code for drug-induced cataract, right 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 cataract of right eye caused by corticosteroid. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cataract and other lens disorders and Drug induced or toxic related condition.

Code Identity

ICD-10-CM Code
H26.31
Billable Status
Yes — Valid for Submission
Code Describes
Drug-induced cataract, right eye
Short Description
Drug-induced cataract, right eye
Same as the full description in the CMS dataset.
Parent Code
H26.3
Drug-induced cataract

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH25-H28Disorders of lens
CategoryH26Other cataract
This CodeH26.31Drug-induced cataract, right eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cataract of right eye caused by corticosteroid
  • Cataract of right eye caused by medication
  • Corticosteroid induced cataract
  • Drug-induced cataract
  • Toxic cataract

Clinical ClassificationClinical

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

CCSR EYE002
Cataract and other lens disorders
Default principal diagnosis: inpatient No · outpatient No
CCSR INJ030
Drug induced or toxic related condition
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Cataract

A cataract is a clouding of the lens in your eye. It affects your vision. Cataracts are very common in older people. By age 80, more than half of all Americans either have a cataract or have had cataract surgery.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert H26.31 to ICD-9-CMHistory

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

ICD-9-CM
366.45 Toxic cataract
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 H26.31Overview

Is H26.31 (Drug-induced cataract) a billable code?

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

What MS-DRG does H26.31 group to?

When drug-induced cataract, right 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 H26.31?

Under the General Equivalence Mappings, drug-induced cataract, right eye converts to ICD-9-CM 366.45 (toxic cataract). 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.