2026 ICD-10-CM Diagnosis Code H25.012Cortical age-related cataract, left eye

ICD-10-CM Codes›H00–H59›H25-H28›H25

ICD-10-CM H25.012
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H25.012 is a billable ICD-10-CM diagnosis code for cortical age-related cataract, left 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. The code is restricted by the Medicare Code Editor to adult patients (age 15 through 124). Coders also document this condition as cortical age-related cataract of left eye. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cataract and other lens disorders.

Code Identity

ICD-10-CM Code
H25.012
Billable Status
Yes — Valid for Submission
Code Describes
Cortical age-related cataract, left eye
Short Description
Cortical age-related cataract, left eye
Same as the full description in the CMS dataset.
Parent Code
H25.01
Cortical age-related cataract

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH25-H28Disorders of lens
CategoryH25Age-related cataract
This CodeH25.012Cortical age-related cataract, left eye

Code EditsBilling

Medicare Code Editor checks that affect claim validity for H25.012.

Adult diagnoses
The Medicare Code Editor detects inconsistencies in adult cases by checking a patient's age and any diagnosis on the patient's record. The adult code edits apply to patients age range is 15–124 years inclusive (e.g., senile delirium, mature cataract).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cortical age-related cataract of left eye
  • Cortical senile cataract

Clinical ClassificationClinical

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

CCSR EYE002
Cataract and other lens disorders
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 H25.012 to ICD-9-CMHistory

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

ICD-9-CM
366.15 Cortical senile 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 H25.012Overview

Is H25.012 (Cortical age-related cataract) a billable code?

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

What MS-DRG does H25.012 group to?

When cortical age-related cataract, left 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.

Who can H25.012 be reported for?

The Medicare Code Editor checks cortical age-related cataract, left eye against patient demographics: this code is intended for adult patients (age 15 through 124). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of H25.012?

Under the General Equivalence Mappings, cortical age-related cataract, left eye converts to ICD-9-CM 366.15 (cortical senile cataract). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.