Carol asks:
Can you use modifier 25 with a critical care code?

The answer is YES. Modifier -25 is used on ANY E/M code which is separately identifiable when done on the same day as a procedure or other service (e.g. CPR & 99291). Just be sure that the procedure/service is not bundled into the critical care code.

F Tessa Bartels, CPC, CPC-E/M