Her areas of expertise include gastrointestinal problems (digestive disorders). Dr. Holtz is professionally affiliated with Washington University Physicians, St. Louis Children's Hospital, and Barnes-Jewish Hospital. She accepts Anthem, Blue Cross/Blue Shield, and Coventry, as well as other insurance carriers. Before performing her residency at Monroe Carell Jr. Children's Hospital at Vanderbilt, Dr. Holtz attended Ohio State University College of Medicine for medical school.