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Please be advised that Highmark is planning system maintenance to start at 8:00 PM EST on Friday, December 13, 2013. It is estimated the maintenance will be completed by 03:00 AM EST on Saturday, December 14, 2013. During this time Highmark will not be able to process real-time transactions. Any batch transaction sent in during this downtime will be held by Highmark until the systems are back up at approximately 03:00 AM on Saturday, December 14, 2013. At that time the transmissions will be processed. As a result you may experience delays in receiving your reports.