2026 ICD-10-CM Diagnosis Code H40.019Open angle with borderline findings, low risk, unspecified eye

ICD-10-CM Codes›H00–H59›H40-H42›H40

ICD-10-CM H40.019
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H40.019 is a billable ICD-10-CM diagnosis code for open angle with borderline findings, low risk, 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 cupping of optic disc due to open angle glaucoma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Glaucoma.

Code Identity

ICD-10-CM Code
H40.019
Billable Status
Yes — Valid for Submission
Code Describes
Open angle with borderline findings, low risk, unspecified eye
Short Description
Open angle with borderline findings, low risk, unsp eye
Parent Code
H40.01
Open angle with borderline findings, low risk

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH40-H42Glaucoma
CategoryH40Glaucoma
This CodeH40.019Open angle with borderline findings, low risk, unspecified eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cupping of optic disc due to open angle glaucoma
  • Disorder of intraocular pressure
  • Open angle glaucoma suspect
  • Open angle with borderline intraocular pressure
  • Pathological cupping of optic disc

Clinical ClassificationClinical

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

CCSR EYE003
Glaucoma
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Glaucoma

Glaucoma is a group of diseases that can damage the optic nerve of one, or both, of your eyes. This can result in vision loss. There are different types of glaucoma, but the most common type is open-angle glaucoma. Other less common types include angle-closure glaucoma, and congenital glaucoma.

The full article covers:

  • What is glaucoma?
  • What causes glaucoma?
  • What are the symptoms of glaucoma?
  • How is glaucoma diagnosed?
  • What are the treatments for glaucoma?
  • Can glaucoma be prevented?

Read the full article at MedlinePlus

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

Convert H40.019 to ICD-9-CMHistory

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

ICD-9-CM
365.01 Opn angl brderln lo risk
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 H40.019Overview

Is H40.019 (Open angle with borderline findings, low risk) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report open angle with borderline findings, low risk, unspecified eye on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H40.019 group to?

When open angle with borderline findings, low risk, 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 H40.019?

Under the General Equivalence Mappings, open angle with borderline findings, low risk, unspecified eye converts to ICD-9-CM 365.01 (opn angl brderln lo risk). 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.