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  • Glaucoma Drainage Device Implant After Failed TCP

    Question: I’m performing an Ahmed tube implantation with patch graft within the global period of a failed transscleral cyclophotocoagulation. What CPT code and modifier is appropriate?

    Answer: Submit CPT code 66180 Aqueous shunt to extraocular equatorial plate reservoir; external approach; with graft. If you performed the TCP, append modifier -78 and the eye modifier. If performed outside of the practice append the eye modifier only.

    Learn more about procedures in the Glaucoma module.