Manhart resides in Omaha, Nebraska with is wife of twenty years, Bonnie Gill. Together they have ten children, eight from Manhart’s first marriage, and two from Gill’s first marriage. Mark has a thirty-year dental partnership with Dr. Tom Steg. Exciting things are happening for Mark’s Calcium Therapy Institute in the areas of Dentistry and Dermatology all over the world: India, Kathmandu, Brazil, Turkey and from coast to coast.