Modifier 59

How to Use Modifier 59 Correctly

January 21, 2026 / Alex J. Lau / Modifier 59, Modifier XE, Modifier XP, Modifier XS, Modifier XU, X{EPSU}

Modifier 59 on screen, female medical coder

Modifier 59 is appended to a CPT code to indicate that a procedure or service was distinct and independent from another service performed on the same day, and that the two services should not be bundled into a single payment. It is used when two procedures would normally be considered part of the same clinical […]

Modifier 59, Modifier XE, Modifier XP, Modifier XS, Modifier XU, X{EPSU}