An independent cardiology group is interpreting ECGs performed in an ED. They discover that the ED was requesting ECGs on all patients without regard for medical necessity. Does the cardiology group need to refund for the interpretations it did?

An independent cardiology group is interpreting ECGs performed in an ED.  They discover that the ED was requesting ECGs on all patients  without regard for medical necessity.  Does the cardiology group need to refund for the interpretations it did?