Glaucoma Suspect ICD-10-CM Codes

Learn how ICD-10 Codes Used for Glaucoma Suspect help healthcare professionals identify individuals with risk factors for glaucoma, even before symptoms manifest.

By Karina Jimenea on Aug 8, 2025.

Fact Checked by Ericka Pingol.

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What ICD-10 Codes are Used for Glaucoma Suspect

H40.0

This glaucoma suspect ICD 10 code is assigned to individuals with one or more risk factors for glaucoma but do not exhibit any signs or symptoms of the disease. Glaucoma is a collection of eye conditions that harm the optic nerve, responsible for transmitting visual information from the eye to the brain. Over time, glaucoma can lead to vision loss and eventual blindness.

H40.00

This is one of the Glaucoma Suspect ICD Codes used when a patient displays one or more glaucoma risk factors, but there's insufficient evidence for a conclusive diagnosis. These risk factors include elevated intraocular pressure, a family history of glaucoma, thin optic nerve rims, age over 60, and certain medical conditions like diabetes and hypertension.

H40.01

This ICD 10 glaucoma suspect code is used when a patient's eyes have open angles and possess one or more risk factors for glaucoma. However, their IOP is slightly elevated, and their optic nerve rims remain relatively healthy.

H40.02

This code is employed when a patient's eyes have open angles and possess one or more risk factors for glaucoma. In this case, their IOP is moderately elevated, or their optic nerve rims show more damage.

H40.03

This ICD 10 for glaucoma suspect code is assigned when a patient's eyes have narrow angles, putting them at risk for angle-closure glaucoma. Angle-closure glaucoma occurs when the iris obstructs fluid drainage from the eye, leading to a sudden increase in IOP.

H40.04

This ICD-10 code for glaucoma suspect is utilized when a patient develops glaucoma following steroid eye drops or medications. Steroids are a medication that can treat inflammation and elevate IOP in some individuals.

H40.05

Ocular hypertension is a condition where IOP is higher than normal, but there is no evidence of optic nerve or visual field damage. Ocular hypertension is a risk factor for glaucoma, but it does not guarantee the development of the disease.

H40.06

This ICD 10 code for glaucoma suspect is employed when a patient's eyes have narrow angles and experience a sudden increase in IOP. There is no evidence of optic nerve or visual field damage. This condition is also referred to as pre-angle glaucoma.

Which Glaucoma Suspect ICD codes are Billable:

H40.0: No
H40.00: No
H40.01: No
H40.02: No
H40.03: No
H40.04: No
H40.05: No
H40.06: No

Clinical Information

These individuals have one or more glaucoma risk factors but no disease symptoms, which damage the optic nerve and can lead to blindness over time.
Glaucoma risk factors include high intraocular pressure (IOP), a family history of glaucoma, thin optic nerve rims, age over 60, and specific medical conditions like diabetes and high blood pressure.
Glaucoma suspects typically do not experience symptoms, but some may occasionally have headaches, blurred vision, or see halos around lights.
Eye doctors diagnose glaucoma suspects through comprehensive eye exams, including IOP measurement, optic nerve evaluation, and visual field testing.
Glaucoma suspects require regular eye exams to detect early signs of glaucoma. Treatment options may involve medications to lower IOP, lifestyle changes like quitting smoking and exercising, or, in severe cases, surgical procedures.
Early detection and treatment are essential to prevent vision loss in glaucoma suspects.
Monitoring and adhering to medical advice are vital steps in managing the risk of developing glaucoma.

Synonyms Include:

Ocular hypertensive
Pre-glaucomatous
Glaucoma risk factor patient
Glaucoma at-risk patient
Person with risk factors for glaucoma
Individual with risk factors for glaucoma

Commonly asked questions

A Glaucoma Suspect ICD code is used when a patient exhibits one or more risk factors for glaucoma, such as elevated intraocular pressure, family history of glaucoma, thin optic nerve rims, or certain medical conditions, but does not yet show any signs or symptoms of the disease. It helps healthcare professionals categorize individuals at risk for glaucoma, facilitating monitoring and early intervention.

Common treatments for Glaucoma Suspect Diagnosis Codes include medication to lower intraocular pressure (IOP), lifestyle modifications like smoking cessation and regular exercise to reduce risk factors, and, in some cases, surgical procedures to manage IOP. The specific treatment depends on the patient's circumstances and the severity of their glaucoma risk.

A diagnosis code for Glaucoma Suspect indicates that the patient has one or more risk factors for glaucoma, but there is no definitive diagnosis of glaucoma at that point. It serves as a warning or classification to healthcare providers that the individual should be closely monitored to detect any early signs or symptoms of glaucoma and initiate timely treatment if necessary.

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