H40.1131 — Primary open-angle glaucoma, bilateral, mild stage

H40.1131

ICD-10 Chapter 7: Eye & Adnexa — illustrative image — Chapter 7: Diseases of the eye and adnexa (H00–H59) — illustrative image

What this code means

Primary open-angle glaucoma of both eyes, mild stage: raised eye pressure gradually damages the optic nerve and peripheral vision.

Also called: primary open-angle glaucoma, poag.

When this code is used

Used for primary open-angle glaucoma, bilateral, mild stage.

Where it sits in ICD-10-CM

Code H40.1131 belongs to Chapter 7: Diseases of the eye and adnexa, which covers codes H00–H59 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related anatomy

Frequently asked questions

What is ICD-10-CM code H40.1131?

H40.1131 is the ICD-10-CM diagnosis code for “Primary open-angle glaucoma, bilateral, mild stage”. Primary open-angle glaucoma of both eyes, mild stage: raised eye pressure gradually damages the optic nerve and peripheral vision.

When is code H40.1131 used?

Used for primary open-angle glaucoma, bilateral, mild stage. It belongs to Chapter 7 of ICD-10-CM (Diseases of the eye and adnexa).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.