H40.001 ICD-10-CM Code: Preglaucoma, unspecified, right eye
H40.001 is not a CMS-HCC payment code. MEAT criteria · RAF calculator · HCC Buddy coding tools
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Diseases of the eye and adnexa (H00-H59) / Glaucoma (H40-H42)
H40.001
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePreglaucoma, unspecified, right eye
This code describes a condition where a patient has risk factors or signs that suggest glaucoma may develop in the future, but the disease has not yet been diagnosed in the right eye. It indicates the eye is being monitored for potential glaucoma development.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for H40.001 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for H40.001 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for H40.001 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for H40.001 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for H40.001 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for H40.001 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for H40.001 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is H40.001 an HCC code?
No. H40.001 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- H40.001
- Description
- Preglaucoma, unspecified, right eye
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
Get the V28 RAF + MEAT cheat sheet
One printable page: confirm a code's V28 HCC status, its RAF weight, and the MEAT your note needs to make it stick. Free, no card.
Free PDF. No card. Unsubscribe anytime.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
H40.001 is the ICD-10-CM diagnosis code for preglaucoma, unspecified, right eye. This code describes a condition where a patient has risk factors or signs that suggest glaucoma may develop in the future, but the disease has not yet been diagnosed in the right eye. It indicates the eye is being monitored for potential glaucoma development. H40.001 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering glaucoma (h40-h42).
H40.001 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Verify documentation specifies 'right eye' before assigning this code; if both eyes are affected, use bilateral code H40.003 instead.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for H40.001 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.