CPT® Code 66150

The procedure described by CPT® Code 66150 involves the surgical technique known as fistulization of the sclera, specifically aimed at treating glaucoma. This procedure utilizes trephination combined with an iridectomy. In simpler terms, scleral fistulization is a method employed to create a new pathway for fluid drainage within the eye, which is crucial for managing intraocular pressure associated with glaucoma. During the operation, the eye is examined under an operating microscope to ensure precision and clarity. An incision is made in the conjunctiva, which is the thin membrane covering the white part of the eye, located near the limbus—the border between the cornea and sclera. This incision allows the surgeon to access the sclera, the tough outer layer of the eye. A flap is then created in the sclera, and a specialized surgical instrument known as a trephine is utilized to excise a small disc of tissue from the iris. This excision, referred to as an iridectomy, facilitates the flow of aqueous humor between the anterior and posterior chambers of the eye, effectively lowering the intraocular pressure. After the necessary modifications are made, the scleral incision is meticulously closed with sutures, followed by the closure of the conjunctiva to complete the procedure.