A Wyoming medical billing firm is trying to contact patients of one of its clients that a vehicle theft could result in a data breach of customer information . Insurance Data Services , at 1161 58th St. in Wyoming , says a West Michigan Delivery Service courier car delivering account information for a client was stolen Sept. 15 at Zondervan Publishing in Kentwood . Camera footage shows a man with a mask and gloves getting into vehicle , company officials say . The car was later found in Kentwood , but police are still looking for suspect . Items in the delivery vehicle have n't been found yet , according to an IDS spokeswoman . The missing documents include information about a portion of Claystone Clinical Associates ' 2,900 patients . The documents include patients ' names , phone number , addresses , diagnoses code , treatment codes , insurer and account balances . ;