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H40

Non-billable

Glaucoma

H40 is the ICD-10-CM code for Glaucoma. It is a non-billable category code — use a more specific child code such as H40.0 for billing.

Status
Header (non-billable)
Chapter
H00-H59
Subcodes
9
Edition
FY2026

H00-H59 Diseases of the eye and adnexa

What this means — in plain language

MedlinePlus · NIH

What is glaucoma? Glaucoma is a group of diseases that can damage the optic nerve of one, or both, of your eyes. This can result in vision loss . There are different types of glaucoma, but the most common type is open-angle glaucoma. Other less common types include angle-closure glaucoma, and congenital glaucoma. You may not have any symptoms of glaucoma. Regular eye exams by an eye care provider can check for…

Read more about Glaucoma at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

  • •absolute glaucoma (H44.51-)
  • •congenital glaucoma (Q15.0)
  • •traumatic glaucoma due to birth injury (P15.3)

Medications indicated for this condition

FDA labeling

Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.

Conditions mapped to this code

MedlinePlus · NIH
Glaucoma

Plain-language health-topic references grounded in MedlinePlus (NIH/NLM).

Frequently asked questions

What is ICD-10 code H40?
H40 is the ICD-10-CM code for "Glaucoma". It falls under H00-H59 Diseases of the eye and adnexa.
Is H40 a billable code?
No — H40 is a non-billable header code. Use a more specific child code (such as H40.0) for billing.
What are the subcodes of H40?
H40 has 9 more specific child codes, including H40.0, H40.1, H40.2.
What is excluded from H40?
Excludes1 (not coded here): absolute glaucoma (H44.51-); congenital glaucoma (Q15.0); traumatic glaucoma due to birth injury (P15.3).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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