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A doctor in scrubs examine's a boy patient's belly. The boy is laying on a table in an exam room.
Trust us to provide your child with the best possible care
At the Division of Pediatric Gastroenterology, we diagnose and treat a wide range of gastrointestinal and nutritional disorders using the most leading-edge techniques.

The Division of Pediatric Gastroenterology at Cohen Children’s is dedicated to providing comprehensive diagnostic and therapeutic services for children from infancy to young adulthood. We treat many disorders and are fully equipped to perform the necessary diagnostic procedures to help make a definitive diagnosis of your child’s medical issues.

Our diagnostic center includes state-of-the-art endoscopic equipment, allowing for complete evaluation of the upper and lower intestine. These procedures can be performed in an outpatient setting within our endoscopy suite, utilizing conscious sedation when necessary. Our goal is to make your child as comfortable as possible during this process. We also strive to educate our patients and their families about their medical concerns.

What we treat

Our experts diagnose, manage and care for a variety of pediatric gastrointestinal and nutritional disorders, including:

  • Celiac disease
  • Chronic vomiting
  • Recurrent abdominal pain
  • Constipation/encopresis
  • Failure to thrive
  • Food allergy
  • Gastroesophageal reflux
  • Gastrointestinal bleeding
  • Hepatitis
  • Inflammatory bowel disease (Crohn’s disease and ulcerative colitis)
  • Irritable bowel syndrome
  • Liver and biliary tract disorders (genetic and acquired)
  • Malabsorption/chronic diarrhea
  • Pancreatic disorders
  • Peptic ulcer disease
  • Short bowel syndrome

Advanced techniques

We offer the most advanced diagnostic and therapeutic techniques, including:

  • Diagnostic endoscopy of the upper and lower gastrointestinal tract 
    • Esophagogastroduodenoscopy
    • Colonoscopy
    • Flexible sigmoidoscopy
  • Therapeutic endoscopy of the upper and lower GI tract
    • Endoscopic treatment of esophageal strictures
    • Treatment of gastrointestinal hemorrhage
    • Polyp removal
    • Foreign body removal
    • Placement of percutaneous gastrostomy tubes (PEG)
  • Small intestine imaging
    • Video capsule evaluation of the small bowel
  • Evaluation of gastroesophageal reflux via intraesophageal pH monitoring
    • Wireless pH probe
    • Electrode based pH probe
    • Impedance testing
  • Evaluation of lactose malabsorption
  • Breath hydrogen analysis
  • Motility studies
    • Esophageal manometry
    • Anorectal manometry
    • Colonic motility
    • Radio-opaque marker studies
  • Liver biopsy
  • Rectal suction biopsy
  • Diagnostic and therapeutic procedures
    • Lactose and glucose breath hydrogen testing
    • Indirect calorimetry
    • Bioelectrical impedance
    • Placement of percutaneous endoscopic gastrostomy (PEG) tube
    • Nutritional support, including home perinatal nutrition, nasogastric tube and gastrostomy tube feedings


Michael Joseph Pettei, MD

Chief of Division - CCMC of Pediatrics - Pediatric Gastroenterology,LiverDisease,Nutrition, Long Island Jewish Medical Center

Specialties: Pediatric Gastroenterology, Pediatrics
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