CPT® Code 66183

The procedure described by CPT® Code 66183 involves the insertion of an anterior segment aqueous drainage device, which is specifically designed to manage chronic or progressive open-angle glaucoma. This condition is characterized by increased intraocular pressure due to inadequate drainage of aqueous humor, leading to potential damage to the optic nerve and vision loss. The procedure utilizes an external approach, which is also referred to as non-penetrating deep sclerectomy. During this surgical intervention, the conjunctiva, which is the thin membrane covering the white part of the eye, is incised to gain access to the underlying structures. A scleral flap is then created, with its base positioned at the corneoscleral junction, commonly known as the limbus. This flap allows for the establishment of an incision into the anterior chamber of the eye, facilitating the flow of aqueous humor. A miniature drainage device, comparable in size to a grain of rice, is implanted between the anterior chamber and beneath the scleral flap. This device plays a crucial role in enhancing the drainage of aqueous humor from the anterior chamber to the space located under the conjunctiva, thereby helping to lower intraocular pressure. After the device is placed, the scleral flap is secured in position with sutures, and the conjunctival incision is subsequently closed to complete the procedure.