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

Alexandra Guillaume, MD

Individual provider Gastroenterology Physician · NPI 1396981197

Alexandra Guillaume, MD is a Gastroenterology in East Setauket, New York. Graduated from Tufts University School of Medicine in 2006, 20 years ago. Practices with Stony Brook Internists University Faculty Practice Corporation, a 428-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in New York and Wisconsin.

Years since qualifying
20
Trained at
Tufts University School of Medicine
Licensed in
NY, WI
In the registry since
2008
Specialties on file
3
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

3 Technology Dr
East Setauket, NY 11733-4064
Phone: (631) 444-5220
Fax: (631) 444-5225
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2845 Greenbrier Rd, Green Bay, WI 54311-6519 — (920) 288-8000

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 254256 (NY)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 100756 (WI)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1396981197
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 29, 2008
Last updated in NPPESJune 30, 2023
Certification dateJune 30, 2023

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2006 (20 years in practice)
Group practice Stony Brook Internists University Faculty Practice Corporation — 428 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations6 on file with Medicare

Other providers in East Setauket