Billing and Coding: Micro-Invasive Glaucoma Surgery

Medicare will cover specified MIGS procedures when performed according to coding guidance and when medically reasonable and necessary criteria in the LCD are met, including CPT 66991/66989 for trabecular meshwork device insertion with cataract surgery and CPT 0449T/0671T for subconjunctival device insertion. Billing is limited to one unit per eye per date of service for these device insertion codes, goniotomy (65820) has strict coding and bundling restrictions (including bundling with 66174), and proper, legible documentation supporting ICD-10 codes and medical necessity must be maintained and available on request.

"CPT 66991 and 66989 are covered for insertion of intraocular aqueous drainage device(s) into the trabecular meshwork (e."

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