Richard K. Mathis, MD

Dr. Mathis is one of the founding physicians of the subspecialty of contemporary Pediatric Gastroenterology. His long term practice of over 30 years creates a foundation for professional experiences punctuated with a depth and breadth of managing complex specialty diagnoses, procedures and diagnostic studies. He currently serves as the director of the Miller Children's Hospital Long Beach GI Laboratory.

He has been an instructor, teaching at Massachusetts General Hospital, Harvard Medical School and University of Minnesota, He continues to share his skills and knowledge with doctors in training from the University of California, Irvine, CA College of Medicine

Dr. Mathis received his medical degree from UCLA. He completed his residency training at the University of Minnesota and his specialty fellowship in pediatric gastroenterology at the Harvard School of Medicine. His special interests have focused on nutrition, liver conditions, cystic fibrosis and inflammatory bowel disease. He is a skilled pediatric endoscopist along with other specialty diagnostic techniques.

Dr. Mathis developed the Pediatric Gastroenterology Program at Miller Children's Hospital and the University of California Irvine. He has been recognized for his outstanding practice and teaching by physicians in training and nurses at Miller Children's Hospital. His community contributions include donated time at The Children's Clinic for medically complex children.

His Southern California practice is centered in Long Beach. He is board certified in Pediatrics and Pediatric Gastroenterology, Hepatology, and Nutrition. His practice includes disorders related to gastroenterology, nutrition and liver. He has received numerous awards and has published many papers in peer review journals.

This physician is a member of MemorialCare Physician Society which drives clinical outcomes and performance for MemorialCare Health System.


  • Gastroenterology - Pediatric


Medical Education
UC Los Angeles School of Medicine
Date Completed:
June 1 1969
University of Minnesota Medical Center
Harvard University Medical School

MemorialCare Hospital Affiliations