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

James Nielsen, MD

Individual provider Pediatrics Physician · NPI 1669432266

James Nielsen, MD is a Pediatric Medicine in East Setauket, New York. Graduated from Tulane University School of Medicine in 1995, 31 years ago. Practices with New York University, a 5,884-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in New York.

Years since qualifying
31
Trained at
Tulane University School of Medicine
Licensed in
NY
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

4 Technology Dr Ste 2
East Setauket, NY 11733-4080
Phone: (631) 444-0650
Show map & directions

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

Additional practice locations (1)

  • 120 Mineola Blvd, Mineola, NY 11501-4064 — (516) 663-4600

Specialties & licences

Pediatric Cardiology Physician (primary) Taxonomy 2080P0202X · Licence 213529-1 (NY)
Pediatrics Physician Taxonomy 208000000X · Licence 213529 (NY)

Record details

NPI number1669432266
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 27, 2006
Last updated in NPPESAugust 19, 2022
Certification dateAugust 19, 2022
Mailing addressPo Box 1559, Stony Brook, NY 11790-0989

Medicare enrollment

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

Medicare specialtyPEDIATRIC MEDICINE
Also practisesCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolTULANE UNIVERSITY SCHOOL OF MEDICINE
Graduated 1995 (31 years in practice)
Group practice New York University — 5884 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Other providers in East Setauket