We have identified 72,638 patients who are at least 66 years of age, have a diagnosis of epilepsy in VA or Medicare files, and who also received AEDs from the VA; 9,682 of of these are incident cases, 41,867 are chronic cases, and 21,089 have been defined as having unknown onset. We found wide variations in prescribing, an high rates of use of suboptimal AEDs (70%). We identified sites with high and low use of suboptimal and new AEDs. We have finalized provider interview protocols, and are in the process of gaining approval at individual sites.