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