About Me

Roy Nattiv, M.D., is a pediatric gastroenterologist specialist at MemorialCare Miller Children’s & Women's Hospital Long Beach, serving as the co-medical director of the Inflammatory Bowel Disease Program. He is a board certified pediatrician, fellowship trained in pediatric gastroenterology (GI), hepatology and nutrition.

Dr. Nattiv graduated from the University of California, Berkeley and received his medical degree from the Sackler School of Medicine in Tel Aviv, Israel. He completed his pediatric residency at the Children’s Hospital at Montefiore, Albert Einstein College of Medicine; and his fellowship at the University of California, San Francisco (UCSF), Benioff Children's Hospital.

During his time at UCSF, Dr. Nattiv performed both clinical and basic scientific research in pediatric gastroenterology. He was a California Institute of Regenerative Medicine (CIRM) fellowship trainee and was awarded the North American Society for Pediatric Gastroenterology, Hepatology and Nutrition (NASPGHAN) Fellow to Faculty Award in Pediatric IBD Research. He is a member of the American Academy of Pediatrics, NASPGHAN and the International Society for Stem Cell Research.

In the clinic, Dr. Nattiv is able to leverage his clinical and scientific knowledge to provide advanced care for children who suffer from gastrointestinal and liver disease, including Crohn’s and ulcerative colitis. He works closely in his community to spread awareness regarding gastrointestinal disease.

Dr. Nattiv is also fluent in Hebrew.


English, Spanish

Provider Specialty

Gastroenterology - Pediatric

Areas of Care

  • Acid Reflux
  • Constipation
  • Crohn’s Disease
  • Diarrhea
  • Heartburn
  • Hepatitis A
  • Hepatitis B
  • Hepatitis C
  • Indigestion
  • Inflammatory Bowel Disease
  • Irritable Bowel Syndrome
  • Peptic Ulcers
  • Short Bowel Syndrome
  • Gastroesophageal Reflux Disease (GERD)
  • Pediatric Specialty Care


Medical Education

Sackler Medical School - Tel Aviv


Children's Hospital at Montefiore - Albert Einstein College of Medicine


UCSF Benioff Children's Hospital San Francisco

Locations & Affiliations


Cherese Mari Laulhere Children's Village - Miller Children's & Women's Hospital Long Beach

2701 Atlantic Ave.

Long Beach, CA

Office: (714) 377-6993

Torrance Outpatient Specialty Center

3640 Lomita Blvd.

Torrance, CA

Office: (714) 377-6993

Insurances Accepted

Anthem Commercial HMO (MCSHP)
BlueShield Commercial HMO (MCSHP)
BlueShield Medicare Advantage HMO (MCSHP)
Health Net Medicare Advantage HMO (MCSHP)
Centivo ACO
Anthem Commercial HMO
Cigna Commercial HMO
Health Net Commercial HMO
BlueShield Commercial HMO
UHC Commercial HMO
Anthem Pathway HMO
Anthem Vivity HMO
Cigna Value/Select HMO
UHC Harmony Commercial HMO
Anthem Pathway HMO (GNP)
BlueShield Trio Commercial HMO (GNP)
Cigna Value/Select HMO (GNP)
UHC Harmony Commercial HMO (GNP)
Aetna Commercial HMO (GNP)
Anthem Commercial HMO (GNP)
BlueShield Commercial HMO (GNP)
Cigna Commercial HMO (GNP)
Health Net Commercial HMO (GNP)
UHC Commercial HMO (GNP)
Anthem Vivity HMO (GNP)