2026 ICD-10-CM Diagnosis Code H40.842Neovascular secondary angle closure glaucoma, left eye

ICD-10-CM Codes›H00–H59›H40-H42›H40

ICD-10-CM H40.842
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H40.842 is a billable ICD-10-CM diagnosis code for neovascular secondary angle closure glaucoma, 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. The code is not accepted as a principal diagnosis by the Medicare Code Editor.

Code Identity

ICD-10-CM Code
H40.842
Billable Status
Yes — Valid for Submission
Code Describes
Neovascular secondary angle closure glaucoma, left eye
Short Description
Neovascular secondary angle closure glaucoma, left eye
Same as the full description in the CMS dataset.
Parent Code
H40.84
Neovascular secondary angle closure glaucoma

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH40-H42Glaucoma
CategoryH40Glaucoma
This CodeH40.842Neovascular secondary angle closure glaucoma, left eye

Code EditsBilling

Medicare Code Editor checks that affect claim validity for H40.842.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Code History & ChangesHistory

New Code H40.842 was added to the ICD-10-CM code set for FY 2026, effective October 1, 2025.

Replacement H40.842 replaces the following previously assigned code(s):

  • H40.84 - Neovascular secondary angle closure glaucoma
FY 2026AddedAdded to the ICD-10-CM code setEffective October 1, 2025.
FY 2026CurrentRevised in the current code setEffective October 1, 2025 through September 30, 2026.

Questions About H40.842Overview

Is H40.842 (Neovascular secondary angle closure glaucoma) a billable code?

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

What MS-DRG does H40.842 group to?

On inpatient claims, neovascular secondary angle closure glaucoma, left eye maps to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.

Can H40.842 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because neovascular secondary angle closure glaucoma, left eye describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.