H40.221
Chronic angle-closure glaucoma, right eye
Clinical Classification Guidelines
Medical Intelligence & Overview
Chronic angle-closure glaucoma is a specific type of glaucoma characterized by a gradual buildup of pressure inside the eye due to blocked drainage channels. When it affects the right eye exclusively, it is classified under ICD-10 code H40.221. This condition is a serious eye disorder that can lead to vision loss if not diagnosed and managed properly. It often develops slowly over time and may not present obvious symptoms in its early stages, making regular eye examinations crucial for early detection and treatment.
Causes & Symptoms
Clinical Causes: Anatomical factors such as a shallow anterior chamber or narrow angles in the eye that predispose to blockage of the drainage pathways. Age-related changes, as the risk increases with advancing age. Genetic predisposition, where a family history of glaucoma increases the likelihood. Other eye conditions, such as cataracts or retinal detachment, that may influence the structure of the eye. Certain medications or health conditions that can affect eye pressure regulation.
Key Symptoms: Gradual loss of peripheral vision, often unnoticed in early stages. Difficulty adapting to darkness or low-light environments. Haloes or glare around lights, especially at night. Occasional eye discomfort or aching sensations. In advanced cases, significant vision impairment or blindness if untreated.
Diagnostic & Treatment
Diagnosis Path: Measuring intraocular pressure (tonometry) to detect elevated eye pressure. Gonioscopy to examine the drainage angle and determine if it is narrow or closed. Optic nerve assessment to look for damage caused by increased eye pressure. Visual field testing to identify peripheral vision loss. Optical coherence tomography (OCT) to assess nerve fiber layer thickness.
Treatment Protocols: Eye drops to lower intraocular pressure, such as prostaglandin analogs, beta-blockers, or alpha agonists. Laser procedures like laser iridotomy, which creates a small opening in the iris to improve fluid flow. Surgical interventions, including trabeculectomy or implanting drainage devices, in cases where medications and laser treatments are insufficient. Regular monitoring and follow-up to assess disease progression and treatment efficacy. Lifestyle modifications, including avoiding activities that increase eye pressure, may be recommended.
Clinical Advice & FAQs
Billing Guidance
Is H40.221 a billable ICD-10 code?
Yes, H40.221 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report H40.221?
Clinical documentation must specify the nature of Chronic angle-closure glaucoma, right eye and any associated comorbidities for accurate reporting.
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