The hack on Change Healthcare left hundreds, if not thousands, of providers without the ability to obtain insurance approval or payment for everything from prescriptions to surgeries, and it shed new light on a part of the health care system that is often overlooked. Dan Weissmann, the host of An Arm and a Leg podcast, speaks with reporters Brittany Trang of STAT News and Maureen Tkacik of The American Prospect about the hack and what it is telling us about antitrust concerns in the health care industry.