Effective October 1, 2011, code 12.67, Insertion of aqueous drainage device, was created for the placement of glaucoma drainage devices, shunts or valves that are designed to improve the flow of aqueous humor from the anterior chamber or pars plana to a small silicone tube that collects and diverts the fluid for absorption into the lymph and blood vessels around the eye.
When the trabecular meshwork drainage system does not allow the flow of aqueous humor from the eye, the fluid builds up and causes damage to the optic nerve. Intraocular pressure affects the function of the optic nerve in transforming light that comes through the eye into electrical impulses that can be interpreted by the brain. Treatment of glaucoma is generally designed to lower intraocular pressure so that there is no serious loss of vision. Glaucoma drainage devices are an option for patients who have failed medical therapy and trabeculectomy. The procedure is reversible and can be performed under local or topical anesthesia.
New code 12.67 Insertion of aqueous drainage device Anterior chamber drainage device Aqueous drainage shunt or stent Eye valve implant Filtration canal shunt or device