A gonioprism was used to visualize the trabecular meshwork (TM). A microcatheter device was inserted

A gonioprism was used to visualize the trabecular meshwork (TM). A microcatheter device was inserted into the anterior chamber, and the cannula tip was used to create an opening in the TM. The catheter was advanced 180 degrees into Schlemm's canal and was peeled through to cut the TM, resulting in a 180-degree goniotomy/ab externo or ab interno trabeculotomy of TM. A similar procedure was performed for the other 180 degrees based on the severity of glaucoma. Would it be appropriate to report code 66174 for this procedure?

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CPT Knowledgebase - Apr 29, 2026