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Modifier for Unlisted procedure


Best answers
need help on this one. Here is the scenario.
The patient is a 29-year-old male with chronic renal failure secondary to Type 1 diabetes. A new procedure, laparoscopic nephron pump implantation, was performed on both the left and right kidneys. Since this is a new procedure and a distinct CPT code is not available, an unlisted code was used.

What modifier(s), if any, should be appended to the following code for physician billing?

50549 - Unlisted laparoscopy procedure, renal

Thank you!:)