An ambulance sits at a hospital emergency center bay Monday, Sept. 28, 2015, in Houston. Medicare paid $30 million for ambulance rides for which patients got no other medical services either at the place they were picked up or at their destination. The mystery ambulance rides are part of a bigger problem with Medicare payments for transporting patients, according to a federal audit being released Tuesday. (AP Photo/Pat Sullivan)

Medicare’s $30M ambulance-ride mystery

WASHINGTON (AP) — Medicare paid $30 million for ambulance rides for which no record exists that patients got medical care at their destinati…