ICD-10-CM · Billable Code
H40.001 — Preglaucoma, unspecified, right eye
Chapter H00-H59: Diseases of the eye and adnexa
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Common questions about H40.001 (Preglaucoma, unspecified, right eye)
What does ICD-10 code H40.001 mean?
H40.001 is the ICD-10-CM 2025 code for Preglaucoma, unspecified, right eye. 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 H40.001 a billable diagnosis code?
Yes, H40.001 is a billable / specific ICD-10-CM code, meaning it can be used by clinicians and hospitals as a primary or secondary diagnosis on claims and electronic health records.
Which ICD-10 chapter does H40.001 belong to?
H40.001 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 Preglaucoma, unspecified, right eye?
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Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗