H40.2290 Chronic angle-closure glaucoma, unspecified eye, stage unspecified

ICD-10-CM Diagnosis Code H40.2290: Chronic Angle-Closure Glaucoma, Unspecified Eye, Stage Unspecified

ICD-10-CM code H40.2290 identifies chronic angle-closure glaucoma when the affected eye and the disease stage are not specified. This active diagnosis concept is classified as a disease or syndrome and is linked to a clinical condition involving intermittent angle obstruction that can lead to optic nerve damage. 1 2 4

Plain-language overview

Chronic angle-closure glaucoma involves an intermittent obstruction of the eye's drainage angle, resulting in scarring and potential optic nerve damage that may occur with or without noticeable symptoms. 2

The underlying mechanism of this condition involves the narrowing or closure of the anterior chamber angle, which normally facilitates the drainage of aqueous humor from the eye. 2

What this code represents

The diagnosis code H40.2290 specifically represents chronic angle-closure glaucoma where the documentation does not specify the affected eye or the stage of the disease. 1 6

Code H40.2290 is an active terminology concept with the semantic type of Disease or Syndrome, and it falls under the parent concept H40.229 for chronic angle-closure glaucoma of an unspecified eye. 1 4

Coding details

The terminology hierarchy for this diagnosis includes narrower concepts that specify laterality and disease stage, such as right eye, bilateral, mild, moderate, and severe stages. 1 3

Documentation considerations

Clinical documentation for this condition may consider factors such as patient age, family history, and predisposing conditions to identify at-risk individuals and differentiate chronic from acute presentations. 2

Accurate clinical documentation differentiates this unspecified code from more specific narrow concepts that designate the affected eye, such as left or bilateral, and the disease stage, such as indeterminate. 1 3

What the sources add

While terminology records define the code's hierarchical structure and active status, clinical literature adds operational context regarding the condition's pathophysiology and potential to culminate in total blindness. 1 2

A phecode mapping resource lists the exact terminology for H40.2290 alongside related variants, demonstrating how unspecified eye and stage designations contrast with specified lateralities and stages in coding systems. 3 5

Sources

1. ICD-10-CM H40.2290 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Phecode 365.2 · ExPRSweb — csg.sph.umich.edu; accessed 2026-07-27.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
5. Name Vocab Code Observational Medical ... — links.lww.com; accessed 2026-07-27.
6. Coding Guidelines for Glaucoma — outsourcestrategies.com; accessed 2026-07-27.