Updated information on use of the 59 modifier
On Jan. 1, 2015 CMS published four new modifiers, XE, XS, XP and XU, to replace most instances where the 59 modifier would have applied. The 59 modifier was created to overcome NCCI edits and allow payment for services that would usually have been bundled into another code. CMS still allowed providers to use modifier 59 when the circumstances did not meet criteria for the new “X” modifiers. An article in MLN Matters (SE1418) reinforces the use of the “X” modifiers and reiterates that the 59 modifier should be used rarely.