H40.1121Billable
Primary open-angle glaucoma, left eye, mild stage
- Chapter
- 7. Diseases of the eye and adnexa
- Category
- H40
- Effective date
- October 1, 2026
Related codes in category H40
H40GlaucomaH40.0Glaucoma suspectH40.00Preglaucoma, unspecifiedH40.001Preglaucoma, unspecified, right eyeYesH40.002Preglaucoma, unspecified, left eyeYesH40.003Preglaucoma, unspecified, bilateralYesH40.009Preglaucoma, unspecified, unspecified eyeYesH40.01Open angle with borderline findings, low riskH40.011Open angle with borderline findings, low risk, right eyeYesH40.012Open angle with borderline findings, low risk, left eyeYesH40.013Open angle with borderline findings, low risk, bilateralYesH40.019Open angle with borderline findings, low risk, unsp eyeYes
Frequently asked questions
What is ICD-10 code H40.1121?
H40.1121 is an ICD-10-CM diagnosis code for Primary open-angle glaucoma, left eye, mild stage.
Is H40.1121 a billable code?
Yes. H40.1121 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is H40.1121 in?
H40.1121 falls under Chapter 7: Diseases of the eye and adnexa.
When did H40.1121 become effective?
H40.1121 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to H40.1121?
H40.1121 belongs to category H40, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.