Most Common Email Formats at HCA Healthcare HCA Healthcare Email FormatsExamplePercentage First.Last@hcamidwest.comJohn.Doe@hcamidwest.com96% Last.First@hcamidwest.comDoe.John@hcamidwest.com2% FLast@hcamidwest.comJDoe@hcamidwest.com1% First.MiddleLast@hcamidwest.comJohn.MichaelDoe@hcamidwest.com1% 3 more rows