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2025 ICD-10-CM code H40.2

Primary angle-closure glaucoma.

It's essential to differentiate between acute, chronic, and intermittent angle-closure glaucoma when coding. If applicable, use additional codes to specify the stage of glaucoma (mild, moderate, severe, indeterminate), laterality (right eye, left eye, bilateral), and any associated conditions, such as elevated intraocular pressure. Ensure the documentation supports the specific type of angle-closure glaucoma being diagnosed.

Medical necessity for services related to H40.2 is established by the presence of signs and symptoms of primary angle-closure glaucoma, impacting the patient's visual function and requiring medical intervention to prevent further vision loss.The documentation should clearly demonstrate the severity of the glaucoma, the impact on the patient's quality of life, and the rationale for the chosen treatment approach.

Diagnosis and management of primary angle-closure glaucoma typically falls under the purview of ophthalmologists. They are responsible for diagnosing the condition through eye exams, measuring intraocular pressure, and assessing the drainage angle. Treatment options may include medications, laser procedures, or surgery to improve fluid outflow and reduce pressure within the eye. Regular monitoring is essential to prevent or slow down vision loss.

In simple words: This is a type of glaucoma where the colored part of your eye blocks the drainage channels, causing pressure buildup inside the eye. This pressure can harm your vision if not treated.

Primary angle-closure glaucoma is a condition where the iris (the colored part of the eye) blocks the drainage angle in the eye, leading to increased intraocular pressure. This pressure can damage the optic nerve and cause vision loss.

Example 1: A 50-year-old patient presents with sudden onset of severe eye pain, blurred vision, and halos around lights. Upon examination, the ophthalmologist diagnoses acute angle-closure glaucoma and initiates treatment to lower the intraocular pressure., A 65-year-old patient with a history of intermittent eye pain and blurred vision is found to have chronic angle-closure glaucoma during a routine eye exam. The ophthalmologist prescribes eye drops to manage the condition and prevent further damage to the optic nerve., A patient with a family history of glaucoma undergoes a comprehensive eye exam, which reveals narrow angles. Although the patient is asymptomatic, the ophthalmologist recommends a preventative laser procedure to reduce the risk of developing angle-closure glaucoma in the future.

Documentation for H40.2 should include details of the patient's symptoms, such as eye pain, blurred vision, halos, nausea, or vomiting.The ophthalmologist's findings from the eye exam, including intraocular pressure measurements, gonioscopy results (assessment of the drainage angle), and optic nerve evaluation, are crucial. Any prior history of glaucoma, family history of glaucoma, and details of treatment provided should also be documented.

** Excludes1: aqueous misdirection (H40.83-) malignant glaucoma (H40.83-)

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