We are changing vendors mid-quarter. 2 questions: Previous #QRDA-376 states both vendors can submit files for the portion of the quarter for which data was entered into their EHR system, "providing unique patient ID's are submitted to ensure the files are not overwritten". 1) What does this require? Should the patient ID for a specific patient be the same in each vendor or different in each vendor? Ex: Vendor A has patient Joe ID as 123, Vendor B has patient Joe ID as 123 - what happens in this scenario if Vendor A submits an encounter for Joe and Vendor B submits a different encounter Joe in the same quarter? Should the ID's match or be different to prevent overwriting the previous files submitted? 2) Our regional hospitals will be changing vendors in Q2 of 2018; can we apply the same logic of 2 vendors submitting at that time?