As with most cases, we need to start with a review of the documentation. You have indicated that litholapaxy of more than 40 calculi measuring 1 mm to 6 mm eachwas performed. Based on this information ...

"If the documentation supported the use of modifier –22, it should be appended," write Jonathan Rubenstein, MD, and Mark Painter. "When determining which code you should use, you must consider your ...