Mealey's (April 24, 2018, 2:00 PM EDT) -- LEXINGTON, Ky. — A medical expert cannot testify for an ambulance company accused of Medicare fraud because his opinions contradict federal Medicare regulations and are impermissible legal conclusions, a Kentucky federal judge decided April 20 (United States of America v. Arrow-Med Ambulance, Inc., et al., No. 17-cr-73, E.D. Ky., 2018 U.S. Dist. LEXIS 66556)....