2007 ICD-9-CM Procedure 12.64 Trabeculectomy ab externo Any surgical procedure for treatment of glaucoma by means of puncture or reshaping of the trabecular meshwork. It includes goniotomy, trabeculectomy, and laser perforation. 12.64 is a specific code that can be used to specify a procedure 12.64 contains 1 index entry View the full Volume 3 12.* hierarchy Index entries containing 12.64: Trabeculectomy ab externo 12.64