2027 ICD-10-CM Diagnosis Code H25.9Unspecified age-related cataract

ICD-10-CM Codes›H00–H59›H25-H28›H25

ICD-10-CM H25.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H25.9 is a billable ICD-10-CM diagnosis code for unspecified age-related cataract. 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. The code is restricted by the Medicare Code Editor to adult patients (age 15 through 124). Coders also document this condition as 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
H25.9
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified age-related cataract
Short Description
Unspecified age-related cataract
Same as the full description in the CMS dataset.
Parent Code
H25
Age-related cataract

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH25-H28Disorders of lens
CategoryH25Age-related cataract
This CodeH25.9Unspecified age-related cataract

Code EditsBilling

Medicare Code Editor checks that affect claim validity for H25.9.

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.

  • Age-related cataract of left eye
  • Age-related cataract of right eye
  • Age-related lens opacity
  • Bilateral age-related cataract
  • Bilateral cataracts
  • Partial cataract
  • Senile cataract

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H25.9: its own notes plus those printed at H25 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 H25 Age-related cataract applies to 30 codes
  • capsular glaucoma with pseudoexfoliation of lens (H40.1-)
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.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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 clear lens inside your eye. This cloudiness blocks light from reaching the back of the eye, making it harder to see clearly. A cataract can affect one or both eyes, but it doesn't spread from one eye to the other.

The full article covers:

  • What are cataracts?
  • What causes cataracts?
  • Who is more likely to develop cataracts?
  • What are the symptoms of cataracts?
  • How are cataracts diagnosed?
  • How are cataracts treated?
  • Can cataracts be prevented?

Read the full article at MedlinePlus

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

Convert H25.9 to ICD-9-CMHistory

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

ICD-9-CM
366.10 Senile cataract NOS
Exact Match The mapping is direct, with no qualifiers.

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 H25.9Overview

What is the ICD-10 code for unspecified age-related cataract?

The ICD-10-CM code for unspecified age-related cataract is H25.9 (sometimes written as H259). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H25.9 (Age-related cataract) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified age-related cataract on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H25.9 group to?

When unspecified age-related cataract 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.

Who can H25.9 be reported for?

The Medicare Code Editor checks unspecified age-related cataract 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 H25.9?

Under the General Equivalence Mappings, unspecified age-related cataract converts to ICD-9-CM 366.10 (senile cataract NOS). The mapping is a direct match.