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Daniel W. Thomas, M.D.

Daniel W. Thomas, M.D.

Division Chief, Gastroenterology and Nutrition
Attending Physician
Professor of Clinical Pediatrics

Daniel W. Thomas, MD is chief of the Division of Pediatric Gastroenterology and Nutrition. Along with overseeing the activities of the division, Dr. Thomas co-directs the Liver and Intestinal Transplant program at Children's Hospital Los Angeles.






Medical School: University of Cincinnati College of Medicine

Internship: Children's Hospital Los Angeles: Pediatrics

Residency: Children's Hospital Los Angeles: Pediatrics

Fellowship: Children's Hospital Los Angeles: Pediatric Gastroenterology


Primary Specialty: Pediatric Gastroenterology


Research Interests: Major areas of research interest are gastrointestinal problems in the neonate, protein metabolism in the intestine a) protein-losing enteropathy. Nutritional complications of gastrointestinal and liver disorders, intestinal development, augmentation, and transplantation, liver transplantation, chronic inflammatory bowel disease (IBD) and acute liver failure. Ongoing research studies, include: 1. Clinical research of GI disease. 2. The utilization of the fecal alpha-1-antrtypsim (FAIAT) excretion test as a routine clinical test for the diagnosis of protein-losing enteropathy (PLE) was developed in our laboratory. 3. Participation in clinical trials employing novel therapies for treatment of PLE. Liver Disease: Co-Investigator CHILDREN Liver Center Grant, 2009-2014. 4. Our center has developed the novel use of the biologic therapeutic agent (Infliximab) to treat initial primary poor function of liver transplant grafts in order to prevent progression to primary nonfunction of the graft. Research is actively underway to evaluate the usefulness of a new clinical test to better assess the degree of post transplant immunoreactivity. Extramural scholarly activities: Authorship and co-authorship of position statements on behalf of the Committee on Nutrition/AAP in making nutritional care recommendations for pediatricians to be given to their patients.

Selected Publications

  • Del Castillo SL, McCulley ME, Khemani RG, Jeffries HE, Thomas DW, Wells WJ, Starnes VA, Moromisato DY: Reducing the incidenceof necrotizing enterocolitis in neonates with hypoplastic left heart syndrome with introduction of an enteral feed protocol. Pediatr Crit Care Med. 2010 May; 11(3):373-7.
  • Wang LW, Tancredi DJ, Thomas DW, The prevalence of chronic gastrointestinal symptoms in children with autism spectrum disorders from multiplex families across the United States. J Pediatr: June 2011; 32 (5):351-360.


Certification: Pediatrics: American Board of Pediatrics; Pediatric Gastroenterology and Pediatric Transplant Hepatology: Subspecialty Board of Pediatrics

Medical Memberships: American Gastroenterological Association, North American Society for Pediatric Gastroenterology, Hepatology and Nutrition, Society for Pediatric Research, American Academy of Pediatrics, Southern California Society for GI Endoscopy, Los Angeles Pediatric Society, Southern California Gastroenterological Association


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