H40.10 (Unspecified open-angle glaucoma) is an umbrella ICD-10-CM medical diagnosis code in the Diseases of the eye and adnexa chapter. It identifies cases of unspecified open-angle glaucoma for clinical documentation, billing and epidemiological tracking.

ICD-10-CM · Category

H40.10 — Unspecified open-angle glaucoma

Chapter H00-H59: Diseases of the eye and adnexa

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Related diagnoses

H40.11Primary open-angle glaucomaH40.12Low-tension glaucomaH40.13Pigmentary glaucomaH40.14Capsular glaucoma with pseudoexfoliation of lensH40.15Residual stage of open-angle glaucoma

Common questions about H40.10 (Unspecified open-angle glaucoma)

What does ICD-10 code H40.10 mean?
H40.10 is the ICD-10-CM 2025 code for Unspecified open-angle glaucoma. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.
Is H40.10 a billable diagnosis code?
H40.10 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under H40.10. Browse the sub-codes listed on this page.
Which ICD-10 chapter does H40.10 belong to?
H40.10 belongs to the chapter "Diseases of the eye and adnexa" (codes H00-H59). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Unspecified open-angle glaucoma?
For a plain-language explanation of Unspecified open-angle glaucoma, ask GoDavaii's Health AI - it explains medical conditions in 22+ Indian languages, free, with no signup. Tap "Ask GoDavaii AI about Unspecified open-angle glaucoma" above to get a personalised answer.

Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗