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

Dr. John C Hahn, MD

Individual provider Specialist · NPI 1538272091

Dr. John C Hahn, MD is a Gastroenterology in Bayonne, New Jersey. Graduated from Rutgers New Jersey Medical School in 1985, 41 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in New Jersey.

Years since qualifying
41
Trained at
Rutgers New Jersey Medical School
Licensed in
NJ
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

534 Ave E Ste 1C
Bayonne, NJ 07002-3987
Phone: (201) 823-0450
Fax: (201) 823-3311
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 25MA04877800 (NJ)
Specialist Taxonomy 174400000X · Licence MA48778 (NJ)

Record details

NPI number1538272091
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 17, 2006
Last updated in NPPESJune 29, 2023
Certification dateJune 29, 2023
Mailing addressPo Box 416457, Boston, MA 02241-6457

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolRUTGERS NEW JERSEY MEDICAL SCHOOL
Graduated 1985 (41 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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