Can you please assist me on a few scenarios and your rationale for your coding selection? Thanks in advance.

Scenario 1
a patient was referred to the gastroenterologist for his diverticulitis. The doctor performed a comprehensive history and physical exam was done. He also did a rectal exam and administered a barium enema, and ordered labs. How would you code this?

Scenario 2
Patient urgently sees an orthopedic doctor for knee stiffness and pain. Doctor performs a detailed history, comprehensive exam, and moderate decision making? How would you code this?

Scenario 3
Problem focused exam
expanded problem focused history
Low complexity
Prescribed 1 several new medications