Lee County Emergency Medical Services notifies past customers of third-party security breach. Lee County Emergency Medical Services reports that on Aug. 4 staff received notification of a customer data breach related to a previous third-party vendor responsible for ambulance billing services. Lee County EMS conducted business with a company called Intermedix Corporation for nearly 15 years, ending its vendor contract in September 2014. Intermedix hired a law […]. Of all the records the firm handled, less than 2% of the total may have been compromised. At this time, there is no indication that any of the information was misused and the notice is being provided out of an abundance of caution, according to SGR. Third-party company: Intermedix Corporation.