2026 ICD-10-CM Diagnosis Code H40.9Unspecified glaucoma

AHRQ’s CCSR groups this code into broader clinical categories.

• Exfoliation Syndrome

  the deposition of flaky, translucent fibrillar material most conspicuous on the anterior lens capsule and pupillary margin but also in both surfaces of the iris, the zonules, trabecular meshwork, ciliary body, corneal endothelium, and orbital blood vessels. it sometimes forms a membrane on the anterior iris surface. exfoliation refers to the shedding of pigment by the iris. (newell, ophthalmology, 7th ed, p380)

• Glaucoma

  an ocular disease, occurring in many forms, having as its primary characteristics an unstable or a sustained increase in the intraocular pressure which the eye cannot withstand without damage to its structure or impairment of its function. the consequences of the increased pressure may be manifested in a variety of symptoms, depending upon type and severity, such as excavation of the optic disk, hardness of the eyeball, corneal anesthesia, reduced visual acuity, seeing of colored halos around lights, disturbed dark adaptation, visual field defects, and headaches. (dictionary of visual science, 4th ed)

• Glaucoma Drainage Implants

  devices, usually incorporating unidirectional valves, which are surgically inserted in the sclera to maintain normal intraocular pressure.

• Glaucoma, Angle-Closure

  a form of glaucoma in which the intraocular pressure increases because the angle of the anterior chamber is blocked and the aqueous humor cannot drain from the anterior chamber.

• Glaucoma, Neovascular

  a form of secondary glaucoma which develops as a consequence of another ocular disease and is attributed to the forming of new vessels in the angle of the anterior chamber.

• Glaucoma, Open-Angle

  glaucoma in which the angle of the anterior chamber is open and the trabecular meshwork does not encroach on the base of the iris.

• Low Tension Glaucoma

  a form of glaucoma in which chronic optic nerve damage and loss of vision normally attributable to buildup of intraocular pressure occurs despite prevailing conditions of normal intraocular pressure.

• Ocular Hypertension

  a condition in which the intraocular pressure is elevated above normal and which may lead to glaucoma.

• Weill-Marchesani Syndrome

  rare congenital disorder of connective tissue characterized by brachydactyly, joint stiffness, childhood onset of ocular abnormalities (e.g., microspherophakia, ectopia lentis; glaucoma), and proportionate short stature. cardiovascular anomalies are occasionally seen.

• Bilateral Glaucoma

  increased pressure in both eyeballs due to obstruction of the outflow of aqueous humor.

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.

The full article covers:

• What is glaucoma?
• What causes glaucoma?
• What are the symptoms of glaucoma?
• How is glaucoma diagnosed?
• What are the treatments for glaucoma?
• Can glaucoma be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.