CPT® Code 92020

Gonioscopy, as defined by CPT® Code 92020, is a specialized eye examination that focuses on the anterior chamber of the eye, specifically the area between the cornea and the iris. This procedure is essential for assessing conditions such as glaucoma and congenital anomalies that may predispose individuals to glaucoma. During gonioscopy, the healthcare provider evaluates the iridocorneal angle, which is crucial for determining the status of the eye's drainage system. The examination allows the clinician to ascertain whether the drainage angle is open, closed, or nearly closed, which is vital for diagnosing the type of glaucoma present. Additionally, gonioscopy aids in identifying any scarring or damage within the drainage angle, which can impact intraocular pressure and overall eye health. The procedure not only assists in diagnosis but can also play a therapeutic role; for instance, during gonioscopy, a laser may be directed at the drainage angle through a specialized lens to help reduce intraocular pressure in patients with glaucoma. The procedure typically involves the patient either lying down or sitting in a chair with their chin and forehead supported, ensuring a stable position while they look straight ahead. Prior to the examination, anesthetic drops are administered to numb the eyes, facilitating a more comfortable experience. A gonioscopy lens is then gently placed on the surface of the eye, and a slit lamp is utilized to illuminate and magnify the view of the iridocorneal drainage angle, allowing for a detailed assessment of its width and condition.