2026 ICD-10-CM Diagnosis Code H40.052Ocular hypertension, left eye

ICD-10-CM Codes›H00–H59›H40-H42›H40

ICD-10-CM H40.052
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H40.052 is a billable ICD-10-CM diagnosis code for ocular hypertension, 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Glaucoma.

Code Identity

ICD-10-CM Code
H40.052
Billable Status
Yes — Valid for Submission
Code Describes
Ocular hypertension, left eye
Short Description
Ocular hypertension, left eye
Same as the full description in the CMS dataset.
Parent Code
H40.05
Ocular hypertension

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH40-H42Glaucoma
CategoryH40Glaucoma
This CodeH40.052Ocular hypertension, left eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal intraocular pressure
  • Drug-induced ocular hypertension
  • Elevated left intraocular pressure
  • Ghost cell ocular hypertension
  • Ghost cell ocular hypertension of left eye
  • Hemolytic ocular hypertension
  • Hemolytic ocular hypertension of left eye
  • Ocular hypertension caused by silicone oil
  • Ocular hypertension due to angle recession
  • Ocular hypertension due to anterior segment anomaly
  • Ocular hypertension due to increased episcleral venous pressure
  • Ocular hypertension due to intraocular hemorrhage
  • Ocular hypertension due to intraocular neoplasm
  • Ocular hypertension due to intraocular neoplasm of left eye
  • Ocular hypertension due to ocular surgery
  • Ocular hypertension due to ocular vascular disorder
  • Ocular hypertension due to systemic syndrome
  • Ocular hypertension of left eye
  • Ocular hypertension of left eye caused by corticosteroid
  • Ocular hypertension of left eye caused by silicone oil
  • Ocular hypertension of left eye due to angle recession
  • Ocular hypertension of left eye due to anterior segment anomaly
  • Ocular hypertension of left eye due to aphakia
  • Ocular hypertension of left eye due to increased episcleral venous pressure
  • Ocular hypertension of left eye due to intraocular hemorrhage
  • Ocular hypertension of left eye due to neovascularization
  • Ocular hypertension of left eye due to ocular surgery
  • Ocular hypertension of left eye due to ocular trauma
  • Ocular hypertension of left eye due to ocular vascular disorder
  • Ocular hypertension of left eye due to pigment dispersion syndrome
  • Ocular hypertension of left eye due to pseudoexfoliation
  • Ocular hypertension of left eye due to retinal detachment
  • Ocular hypertension of left eye due to systemic syndrome
  • Ocular hypertension of left eye due to uveitis
  • Phacolytic ocular hypertension
  • Phacolytic ocular hypertension of left eye
  • Primary ocular hypertension
  • Primary ocular hypertension of left eye
  • Raised intraocular pressure
  • Secondary ocular hypertension caused by corticosteroid
  • Secondary ocular hypertension due to aphakia
  • Secondary ocular hypertension due to neovascularization
  • Secondary ocular hypertension due to ocular trauma
  • Secondary ocular hypertension due to pigment dispersion syndrome
  • Secondary ocular hypertension due to pseudoexfoliation
  • Secondary ocular hypertension due to retinal detachment
  • Secondary ocular hypertension due to uveitis
  • Secondary ocular hypertension of left eye

Clinical ClassificationClinical

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

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

Clinical InformationClinical

  • Ocular Hypertension

    a condition in which the intraocular pressure is elevated above normal and which may lead to glaucoma.

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 H40.052 to ICD-9-CMHistory

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

ICD-9-CM
365.04 Ocular hypertension
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 H40.052Overview

Is H40.052 (Ocular hypertension) a billable code?

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

What MS-DRG does H40.052 group to?

When ocular hypertension, 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 H40.052?

Under the General Equivalence Mappings, ocular hypertension, left eye converts to ICD-9-CM 365.04 (ocular hypertension). 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.