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Iheanyichukwu Aja Onu, MD, Gastroenterology, Freeport, NY, Mount Sinai South Nassau

IheanyichukwuAja OnuMD

Gastroenterology Freeport, NY

Advanced Endoscopic Interventional


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  • Dr. Iheanyichukwu Aja Onu, MD is a gastroenterologist in Freeport, New York. He is currently licensed to practice medicine in New York and Maryland. He is affiliated with Mount Sinai South Nassau, Mercy Medical Center, and Long Island Jewish Valley Stream.

Education & Training

  • SUNY Downstate Health Sciences University
    SUNY Downstate Health Sciences UniversityFellowship, Gastroenterology, 1996 - 1999
  • St Johns Episcopal Hospital-South ShoreResidency, Internal Medicine, 1993 - 1996
  • University of Nigeria Faculty of Medicine
    University of Nigeria Faculty of MedicineClass of 1986

Certifications & Licensure

  • NY State Medical License
    NY State Medical License 1996 - 2022
  • MD State Medical License
    MD State Medical License 1994 - 1996
  • American Board of Internal Medicine Internal Medicine
  • American Board of Internal Medicine Gastroenterology

Hospital Affiliations