What Is the Coder Instructed to Do with Category III

Multiple Choice

What is the coder instructed to do with category III codes in the CPT?

A) Use a category III code along with a category I unlisted code.
B) If there is a category III code available, it must be used instead of an unlisted category I code.
C) Use of these codes is optional.
D) Never use category III codes for hospital encounters.