Dr. Bassam S. Younes, Pediatric Gastroenterology

Dedicated to treating and researching all gastrointestinal disorders, Dr. Bassam Younes is involved in numerous research projects. He serves as coinvestigator in several multi-center studies evaluating the efficacy and safety of new drug treatments for pediatric patients with Crohn’s disease. He is involved with a study evaluating inter acid treatment for inflammatory bowel disease and CHOC’s research on anti-Interleukin 5 therapy for the treatment of eosinophilic esophagitis. Dr. Younes is pursuing further research on the treatment of pediatric liver disease.

Dedicated to clinical excellence, Dr. Younes is board certified in both pediatrics and pediatric gastroenterology by the American Board of Pediatrics. Prior to joining CHOC, Dr. Younes attended medical school at Semmelweis University School of Medicine in Budapest, Hungary. He received his residency training at Semmelweis University School of Medicine and Maimonides Medical Center in Brooklyn, New York. Dr. Younes conducted his fellowship in pediatric gastroenterology-hepatology and nutrition at UCLA.

Research Focus

Crohn’s disease, inflammatory bowl disease, anti-Interleukin 5 therapy for the treatment of eosinophilic esophagitis


CHOC Clinic
1201 W. La Veta Ave. Building: CHOC Clinic
Orange, CA 92868
phone: 888-770-2462
fax: 855-246-2329

CHOC Health Center in Corona
854 Magnolia Ave. 101
Corona, CA 92879

11100 Warner Ave. 368
Fountain Valley, CA 92708

CHOC Health Center – Mission Viejo
26691 Plaza Suite 130
Mission Viejo, CA 92691

CHOC Specialty Center – Newport Beach
500 Superior Ave. 140
Newport Beach, CA 92663
phone: (949) 631-3603
fax: (877) 484-4017

Batavia Woods Medical Center
725 W. La Veta Ave. 100
Orange, CA 92868

CHOC at Mission Hospital
27700 Medical Center Rd
Mission Viejo, CA 92691

St Joseph Hospital
1100 W Stewart Dr
Orange, CA 92868

Western Medical Center
1001 N Tustin Ave
Santa Ana, CA 92705


  • Fellowship
    Pediatric Gastroenterology Hepatology & Nutrition
    UCLA Children’s Hospital, Los Angeles, CA
  • Internship
    Apathy Memorial Hospital, Budapest, Hungary
  • Medical School
    Semmelweis University School of Medicine, Budapest, Hungary
  • Residency
    Semmelweis University School of Medicine – Pediatrics
    Maimonides Medical Center, Brooklyn, New York – Pediatrics
    Maimonides Medical Center, Brooklyn, New York – Pediatric Chief Resident

Administrative Appointments

  • Gastroenterology, CHOC Specialists

Honors and Awards

  • Orange County Medical Association’s Physicians of Excellence 2012

Professional Organizations

  • American Academy of Pediatrics
  • North American Society of Pediatric Gastroenterology Hepatology & Nutrition


  • B.S. Younes, M. E.Ament, S. V. McDiarmid et al The Involvement of the Gastrointestinal Tract in Posttransplant Lymphoproliferative Disease in Pediatric Liver Transplantation. J Pediatr Gastroenterol Nutr, Vol.28, No.4, April 1999.
  • B.S. Younes,S.V. McDiarmid, M.G.Martin et al The Effect of Immunosuppression on Posttransplant Lymphoproliferative Disease in Pediatric Liver Transplant Patients Transplantation Vol.70,94-99, No.1, July 15, 2000.

Our gastroenterologists commonly treat:

  • Bassam S Younes MD
    • Appointments:
    • Office: 714-509-4099
    • Specialty: Gastroenterology
    • Board Certified: Pediatrics, Pediatric Gastroenterology
    • On Staff at: CHOC Hospital in Orange and CHOC at Mission Hospital