2026 ICD-10-CM Diagnosis Code H11.242Scarring of conjunctiva, left eye

ICD-10-CM Codes›H00–H59›H10-H11›H11

ICD-10-CM H11.242
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H11.242 is a billable ICD-10-CM diagnosis code for scarring of conjunctiva, 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. Coders also document this condition as scar of conjunctiva of left eye. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cornea and external disease.

Code Identity

ICD-10-CM Code
H11.242
Billable Status
Yes — Valid for Submission
Code Describes
Scarring of conjunctiva, left eye
Short Description
Scarring of conjunctiva, left eye
Same as the full description in the CMS dataset.
Parent Code
H11.24
Scarring of conjunctiva

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH10-H11Disorders of conjunctiva
CategoryH11Other disorders of conjunctiva
This CodeH11.242Scarring of conjunctiva, left eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Scar of conjunctiva of left eye

Clinical ClassificationClinical

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

CCSR EYE001
Cornea and external disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

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Read the full article at MedlinePlus

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

Convert H11.242 to ICD-9-CMHistory

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

ICD-9-CM
372.64 Scarring of conjunctiva
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 H11.242Overview

Is H11.242 (Scarring of conjunctiva) a billable code?

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

What MS-DRG does H11.242 group to?

When scarring of conjunctiva, 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.

What is the ICD-9 equivalent of H11.242?

Under the General Equivalence Mappings, scarring of conjunctiva, left eye converts to ICD-9-CM 372.64 (scarring of conjunctiva). 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.