Dr. Iheanyichukwu Aja-Onu is a gastroenterologist practicing in Oceanside, NY. Dr. Aja-Onu specializes in the digestive system and its diseases that affect the gastrointestinal tract, which include organs from the mouth to the anus as well as liver disorders. Gastroenterology includes conditions such as hepatitis, peptic ulcer disease, colitis, nutritional problems and irritable bowel syndrome. Dr. Aja-Onu performs colonoscopy and endoscopy procedures and provides accurate and thorough care for patients suffering from digestive issues.
Education and Training
Univ Of Nigeria- Coll Of Med- Enugu- Anambra- Nigeria 1986
University Of Nigeria Faculty Of Med University Of Nigeria Teaching Hospital 1986
Internal MedicineAmerican Board of Internal MedicineABIM- Gastroenterology
- Suny Hlth Sci Ctr Brooklyn, Gastroenterology; St Johns Espiscpl Hsp-S Shr, Internal Medicine
- NewYork-Presbyterian/Columbia University Medical Center (Advanced Training)
- SUNY Downstate Medical Center
- SUNY Downstate Medical Center
Articles and Publications
- Co-Author of Many Papers and Publications
Hobbies / Sports
Favorite professional publications
- Gastroenterology Journal
Dr. Iheanyichukwu Aja-Onu M.D.'s Practice location
Oceanside, NY 11572Get Direction
Freeport, New York 11520Get Direction
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Get to know Gastroenterologist Dr. Iheanyichukwu Aja-Onu, who serves the population of Freeport, New York. Dr. Aja-Onu graduated with his Medical Degree from the University of Nigeria, in Nsukka in 1986, giving him over three decade of experience in his field. After obtaining his medical degree he relocated to the United States where he completed his internship with the SUNY Downstate Medical Center followed by his internal medicine residency with St Johns Episcopal Hospital. Dr. Aja-Onu is dual certified in internal medicine and Gastroenterology by the American Board of Internal Medicine. To stay up to date in his field he remains a Fellow of the American College of Gastroenterology and the American Society for Gastrointestinal Endoscopy. He currently practices with Ocean Gastroenterology and is affiliated with South Nassau Communities Hospital and Mercy Medical Center where he holds an expertise in Advanced Endoscopy and related procedures. He previously served as the Chief of Gastroenterology with the SUNY Downstate Medical Center for over a decade. Gastroenterology is the study of the normal function and diseases of the esophagus, stomach, small intestine, colon and rectum, pancreas, gallbladder, bile ducts and liver. It involves a detailed understanding of the normal action (physiology) of the gastrointestinal organs including the movement of material through the stomach and intestine (motility), the digestion and absorption of nutrients into the body, removal of waste from the system, and the function of the liver as a digestive organ. It includes common and important conditions such as colon polyps and cancer, hepatitis, gastroesophageal reflux (heartburn), peptic ulcer disease, colitis, gallbladder and biliary tract disease, nutritional problems, Irritable Bowel Syndrome (IBS), and pancreatitis. In essence, all normal activity and disease of the digestive organs are part of the study of Gastroenterology. When not working, Dr. Aja-Onu enjoys traveling.
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