Through our collaboration with Optum®, AMGA has access to longitudinal clinical patient records from more than 25 million patients. Optum maps and normalizes the electronic health record (EHR) clinical and adjudicated claims data making it possible to conduct apples-to-apples comparisons across the 22 AMGA members providing data to the Optum Common Data Repository (CDR). The CDR dates from January 1, 2014 to the present and is refreshed quarterly. The CDR includes ambulatory care data for 22 AMGA members, hospital data for 12 organizations, and adjudicated claims data for 12 organizations. AMGA also can access de-identified data from OptumLabs Data Warehouse that includes administrative claims data for 138 million patients and 94 million clinical EHR records.