2026 ICD-10-CM Diagnosis Code H40.89Other specified glaucoma
ICD-10-CM Codes›H00–H59›H40-H42›H40
- Billable — Valid for Submission
- Chronic Condition
H40.89 is a billable ICD-10-CM diagnosis code for other specified glaucoma. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Glaucoma.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute-on-chronic glaucoma
- Aphakic glaucoma
- Bilateral postoperative angle closure
- Bilateral postoperative angle closure glaucoma
- Bilateral secondary angle closure glaucoma
- Glaucoma due to combination of mechanisms
- Glaucoma of bilateral eyes due to combination of mechanisms
- Glaucoma of childhood
- Glaucoma of left eye due to combination of mechanisms
- Glaucoma of right eye due to combination of mechanisms
- Hemolytic glaucoma
- Iatrogenic angle-closure glaucoma
- Iatrogenic glaucoma
- Postoperative angle closure glaucoma of left eye
- Postoperative angle closure glaucoma of right eye
- Postoperative angle closure of left eye
- Postoperative angle closure of right eye
- Postoperative angle-closure glaucoma
- Secondary childhood glaucoma following congenital cataract surgery
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- specified type NEC - H40.89
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Glaucoma
- specified type NEC
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
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.
Patient EducationClinical
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.
Convert H40.89 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H40.89Overview
Is H40.89 (Other glaucoma) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified glaucoma on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does H40.89 group to?
When other specified glaucoma is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of H40.89?
Under the General Equivalence Mappings, other specified glaucoma converts to ICD-9-CM 365.89 (glaucoma NEC). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
