2026 ICD-10-CM Diagnosis Code H15.109Unspecified episcleritis, unspecified eye

ICD-10-CM Codes›H00–H59›H15-H22›H15

ICD-10-CM H15.109
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H15.109 is a billable ICD-10-CM diagnosis code for unspecified episcleritis, 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 diffuse episcleritis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cornea and external disease and Uveitis and ocular inflammation.

Code Identity

ICD-10-CM Code
H15.109
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified episcleritis, unspecified eye
Short Description
Unspecified episcleritis, unspecified eye
Same as the full description in the CMS dataset.
Parent Code
H15.10
Unspecified episcleritis

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH15-H22Disorders of sclera, cornea, iris and ciliary body
CategoryH15Disorders of sclera
This CodeH15.109Unspecified episcleritis, unspecified eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Diffuse episcleritis
  • Episcleral and scleral disorder
  • Episcleritis
  • Immune-mediated scleritis
  • Rheumatoid episcleritis
  • Rheumatoid scleritis
  • Scleritis and episcleritis
  • Sectoral episcleritis
  • Simple episcleritis

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
CCSR EYE004
Uveitis and ocular inflammation
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Eye Diseases

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Read the full article at MedlinePlus

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

Convert H15.109 to ICD-9-CMHistory

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

ICD-9-CM
379.00 Scleritis NOS
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 H15.109Overview

Is H15.109 (Unspecified episcleritis) a billable code?

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

What MS-DRG does H15.109 group to?

When unspecified episcleritis, 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 H15.109?

Under the General Equivalence Mappings, unspecified episcleritis, unspecified eye converts to ICD-9-CM 379.00 (scleritis NOS). 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.