What is the difference between concurrent and retrospective CDI queries?

What is the difference between concurrent and retrospective CDI queries?

• A. Concurrent queries occur after chart closure; retrospective during encounter.
• B. Concurrent queries occur during the encounter for real-time documentation; retrospective queries occur after chart review.
• C. Both occur only after discharge.
• D. They are indistinguishable in timing.

Answer: (B)