WEST HARTFORD, CT--(Marketwire - March 23, 2011) - The law firm of Izard Nobel LLP, which has significant experience representing investors in prosecuting claims of securities fraud, announces that a lawsuit seeking class action status has been filed in the United States District Court for the District of Maryland on behalf of purchasers of the securities of Medifast, Inc. ("Medifast" or the "Company") (NYSE: MED) between March 4, 2010 and March 10, 2011, inclusive (the "Class Period").