2026 ICD-10-CM Diagnosis Code H11.429Conjunctival edema, unspecified eye

ICD-10-CM Codes›H00–H59›H10-H11›H11

ICD-10-CM H11.429
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H11.429 is a billable ICD-10-CM diagnosis code for conjunctival edema, unspecified 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 chemosis of conjunctiva. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cornea and external disease.

Code Identity

ICD-10-CM Code
H11.429
Billable Status
Yes — Valid for Submission
Code Describes
Conjunctival edema, unspecified eye
Short Description
Conjunctival edema, unspecified eye
Same as the full description in the CMS dataset.
Parent Code
H11.42
Conjunctival edema

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH10-H11Disorders of conjunctiva
CategoryH11Other disorders of conjunctiva
This CodeH11.429Conjunctival edema, unspecified eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chemosis of conjunctiva
  • Conjunctival edema
  • Mucous membrane edema
  • Subconjunctival edema

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 H11.429 to ICD-9-CMHistory

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

ICD-9-CM
372.73 Conjunctival edema
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 H11.429Overview

Is H11.429 (Conjunctival edema) a billable code?

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

What MS-DRG does H11.429 group to?

When conjunctival edema, unspecified 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 H11.429?

Under the General Equivalence Mappings, conjunctival edema, unspecified eye converts to ICD-9-CM 372.73 (conjunctival edema). 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.