• Appending modifier -58


    Question: When do I append modifier -58?

    Answer: It is appropriate to append procedures with modifier -58 in several scenarios. These include situations when:

    • The current procedure is more extensive than the previous;
    • A therapeutic procedure follows a diagnostic procedure; or
    • The current procedure was planned and documented at the time of the first procedure.

    You should not append modifier -58 to any procedures with phrases such as “one or more sessions." There is no payment reduction to the procedure when you append modifier -58. A new global period begins.