Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Iheanyichukwu Aja-Onu, MD

Individual provider Gastroenterology Physician · NPI 1720077944

Iheanyichukwu Aja-Onu, MD is a Gastroenterology in Freeport, New York. Graduated from State University of New York Downstate Medical Center in 1996, 30 years ago. Accepts Medicare assignment. Licensed in New York.

Years since qualifying
30
Trained at
State University of New York Downstate Medical Center
Licensed in
NY
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

3 N Main St
Freeport, NY 11520-2218
Phone: (516) 623-5076
Fax: (516) 623-5076
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 203413 (NY)

Record details

NPI number1720077944
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 20, 2005
Last updated in NPPESJanuary 5, 2021
Certification dateJanuary 5, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolSTATE UNIVERSITY OF NEW YORK DOWNSTATE MEDICAL CENTER
Graduated 1996 (30 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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