Dr. Iheanyichukwu Aja-Onu, MD, FASGE, FACG?
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Dr. Iheanyichukwu Aja-Onu, MD, FASGE, FACG, Gastroenterologist
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Dr. Iheanyichukwu Aja-Onu, MD, FASGE, FACG

Gastroenterologist | Gastroenterology

1 Healthy Way Attn: Physician Bill Oceanside NY, 11572
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About

Iheanyichukwu Aja-Onu, MD, FASGE, FACG, is a gastroenterologist who diagnoses and treats patients at his private practice in Freeport, New York. Furthermore, he has staff memberships at several local hospitals, including Catholic Health Services Mercy Medical Center in Rockville Centre, New York, Catholic Health Services Good Samaritan Medical Center in West Islip, New York, Catholic Health Services St. Catherine of Siena Medical Center in Smithtown, New York, and South Nassau Communities Hospital in Oceanside, New York. As a gastroenterologist, Dr. Aja-Onu has dedicated training and unique experience in the management of diseases of the gastrointestinal tract and liver. He has an impressive professional journey that spans twenty-eight years and has expanse knowledge and unrivaled expertise in all facets of gastroenterology. Throughout his many years of experience, Dr. Aja-Onu has upheld a steadfast commitment to the ethical and professional standards of his practice, as evidenced by his sterling record, and ensures an impeccable degree of patient satisfaction in all facets of his work. He dedicates his spare time to traveling.

Dr. Iheanyichukwu Aja-Onu, MD, FASGE, FACG's Videos

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

Board Certification

Internal MedicineAmerican Board of Internal MedicineABIM- Gastroenterology

Provider Details

MaleEnglish

Internships

  • SUNY Downstate Medical Center

Fellowships

  • SUNY Downstate Medical Center

Articles and Publications

  • Co-Author of Many Papers and Publications

Hobbies / Sports

  • Traveling

Favorite professional publications

  • Gastroenterology Journal

Dr. Iheanyichukwu Aja-Onu, MD, FASGE, FACG's Practice location

Practice At 1 Healthy Way Attn: Physician Billing

1 Healthy Way Attn: Physician Bill -
Oceanside, NY 11572
Get Direction
New patients: 516-593-7500
Fax: 516-593-7535

Ocean Gastroenterology

3 N Main St -
Freeport, New York 11520
Get Direction
New patients: 516-623-5076
Fax: 516-623-5076

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Media Releases

Get to know Gastroenterologist Dr. Iheanyichukwu Aja-Onu, who serves patients in Oceanside, New York.

Board-certified gastroenterologist, Dr. Aja-Onu, has over three decades of experience in his field. In addition to his affiliation with Mercy Medical Center and St. Catherine of Siena Medical Center, he serves patients at Mount Sinai South Nassau in Oceanside, New York.

Mount Sinai South Nassau is an award-winning, 455-bed, acute care, not-for-profit teaching hospital that provides inpatient, outpatient, home health, restorative, preventive, and emergency medicine services to the area. Prior to his current endeavors, the doctor served as the Chief of Gastroenterology with the SUNY Downstate Medical Center in New York City, New York for over a decade.

His acclaimed career in medicine began in 1986 when he earned his medical degree from the University of Nigeria, Nsukka. Upon relocating to the United States, he went on to complete his internship and residency in internal medicine at St. John’s Episcopal Hospital in New York City, followed by his fellowship in gastroenterology at SUNY Downstate Medical Center. 

The co-author of many papers and publications, Dr. Aja-Onu is board-certified in both internal medicine and gastroenterology by the American Board of Internal Medicine – a physician-led, non-profit, independent evaluation organization driven by doctors who want to achieve higher standards for better care in a rapidly changing world. Additionally, he is a Fellow of the American Society for Gastrointestinal Endoscopy and a Fellow of the American College of Gastroenterology. 

Gastroenterology is the branch of medicine focused on the digestive system and its disorders. A gastroenterologist is a physician who has extensive training in the diagnosis and treatment of disorders related to the esophagus, stomach, small intestines, colon, liver, pancreas, and biliary system. 

Outside of the office, Dr. Aja-Onu enjoys traveling.

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MERCY MEDICAL CENTERl

1000 NORTH VILLAGE AVENUE ROCKVILLE CENTRE NY 11570

Head west 285 ft
Turn right onto Nassau Parkway 368 ft
Turn right onto Oceanside Road 1467 ft
Turn left onto Merrick Road 889 ft
Turn right onto North Long Beach Road 1.2 mi
Turn left onto De Mott Avenue 4004 ft
Turn right onto North Village Avenue 4700 ft
Turn right 250 ft
You have arrived at your destination, on the right

3.5 miSee direction

FRANKLIN HOSPITALl

900 FRANKLIN AVENUE VALLEY STREAM NY 11580

Head west 285 ft
Turn right onto Nassau Parkway 368 ft
Turn right onto Oceanside Road 1467 ft
Turn left onto Merrick Road 1.4 mi
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Turn left onto Lakeview Avenue 4918 ft
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4.4 miSee direction

WINTHROP-UNIVERSITY HOSPITALl

259 FIRST STREET MINEOLA NY 11501

Head west 285 ft
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Turn left onto Merrick Road 889 ft
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7.2 miSee direction

NASSAU UNIVERSITY MEDICAL CENTERl

2201 HEMPSTEAD TURNPIKE EAST MEADOW NY 11554

Head southeast on North Main Street 729 ft
Turn left onto Sunrise Highway (NY 27) 4186 ft
Take the ramp on the right 598 ft
Merge left onto Meadowbrook State Parkway (M) 4.3 mi
Take the ramp on the right towards NY 24 East: East Meadow 1262 ft
Make a slight right onto Hempstead Tpke (NY 24) 1.4 mi
Make a U-turn onto Hempstead Turnpike (NY 24) 316 ft
You have arrived at your destination, on the right

7.0 miSee direction

SOUTH NASSAU COMMUNITIES HOSPITALl

ONE HEALTHY WAY OCEANSIDE NY 11572

Head southeast on North Main Street 681 ft
Make a sharp right onto Sunrise Highway (NY 27) 2.6 mi
Keep in the middle 309 ft
Turn left onto North Long Beach Road 1185 ft
Turn left onto Merrick Road 889 ft
Turn right onto Oceanside Road 1467 ft
Turn left onto Nassau Parkway 368 ft
Turn left 285 ft
You have arrived at your destination, on the left

3.5 miSee direction

MERCY MEDICAL CENTERl

1000 NORTH VILLAGE AVENUE ROCKVILLE CENTRE NY 11570

Head northwest on North Main Street 1.1 mi
Continue straight onto Nassau Road 1.0 mi
Turn left onto Pine Street 230 ft
Take the ramp on the left 426 ft
Merge left onto Southern State Parkway (SO) 2.1 mi
Take the ramp on the right towards Peninsula Boulevard South 660 ft
Go straight onto Peninsula Boulevard 1296 ft
Make a slight left 229 ft
Make a slight left 250 ft
You have arrived at your destination, on the right

4.8 miSee direction