H40.2294 Chronic angle-closure glaucoma, unspecified eye, indeterminate stage

ICD-10-CM Code H40.2294: Chronic angle-closure glaucoma, unspecified eye, indeterminate stage

ICD-10-CM code H40.2294 identifies chronic angle-closure glaucoma in an unspecified eye at an indeterminate stage. The condition involves intermittent obstruction of the eye's drainage angle, potentially causing scarring and optic nerve damage. This code is active for clinical terminology, and clinical sources detail the disease's pathophysiology and management. 1 2

Plain-language overview

Chronic angle-closure glaucoma occurs when a portion of the drainage angle is intermittently obstructed, resulting in subsequent scarring and potential damage to the optic nerve. 2

This condition can manifest with or without symptoms, and individuals may also experience episodes of acute angle-closure, which is a medical emergency requiring immediate treatment. 2

What this code represents

Code H40.2294 represents the diagnosis of chronic angle-closure glaucoma, unspecified eye, indeterminate stage, and is classified under the broader parent concept H40.229. 1

The semantic type assigned to H40.2294 is Disease or Syndrome, and the terminology record maintains an active status within the ICD-10-CM version 2026. 1 6

Coding details

Within the ICD-10-CM terminology, H40.2294 has narrower related concepts and is a direct child of the parent concept H40.229, which denotes chronic angle-closure glaucoma of an unspecified eye. 1

Documentation considerations

Clinical documentation for this condition must differentiate between chronic and acute angle-closure glaucoma based on clinical presentations, symptoms, and disease progression to prevent irreversible optic nerve damage. 2

Coverage and utilization context

Medicare billing and coding guidance for corneal pachymetry mentions chronic angle-closure glaucoma variants, but the supplied excerpts do not explicitly list code H40.2294 in that context. 4 5

What the sources add

While clinical sources detail the etiology and management of chronic angle-closure glaucoma, official terminology records provide the exact hierarchical structure and semantic classification for H40.2294. 1 2

Sources

1. ICD-10-CM H40.2294 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. Article - Billing and Coding: Corneal Pachymetry (A56457) — cms.gov; accessed 2026-07-27.
5. Article - Billing and Coding: Corneal Pachymetry (A56548) — cms.gov; accessed 2026-07-27.
6. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.