Which of following questions should be asked and answered yes before coding as a consultation?

A) Does the documentation of the service clearly demonstrate who made the request and the nature of the opinion requested?
B) Has the provider provided a written report of his or her opinion/advice to the referring physician?
C) Although the referring physician may have asked for a "consultation," should the E/M service truly be reported as a consultation?
D) all of the above.

D) all of the above.