Alexandra Guillaume, MD in East Setauket, NY

Alexandra Guillaume, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in East Setauket, New York. She went to Tufts University School Of Medicine and graduated in 2006 and has 18 years of diverse experience with area of expertise as Gastroenterology. She is a member of the group practice Stony Brook Internists University Faculty Practice Corporation, Ascension Medical Group-fox Valley Wisconsin Inc, Aurora Medical Group, Inc. and her current practice location is 3 Technology Dr, East Setauket, New York. You can reach out to her office (for appointments etc.) via phone at (631) 444-5220.

Alexandra Guillaume is licensed to practice in New York (license number 254256) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1396981197.

Contact Information

	Alexandra Guillaume, MD
	3 Technology Dr, East Setauket, NY 11733-4064
	(631) 444-5220
	(631) 444-5225

Map and Direction

Physician's Profile

Full Name	Alexandra Guillaume
Gender	Female
Speciality	Gastroenterology
Experience	18 Years
Location	3 Technology Dr, East Setauket, New York
Accepts Medicare Assignments	Yes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.

Medical Education and Training:

Alexandra Guillaume attended and graduated from Tufts University School Of Medicine in 2006

NPI Data:

NPI Number: 1396981197
Provider Enumeration Date: 12/29/2008
Last Update Date: 06/30/2023

Medicare PECOS Information:

PECOS PAC ID: 8426343591
Enrollment ID: I20160829001432

Medical Identifiers

Medical identifiers for Alexandra Guillaume such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1396981197	NPI	-	NPPES
100241776	Medicaid	WI

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207RG0100X	Internal Medicine - Gastroenterology	254256 (New York)	Primary
207RG0100X	Internal Medicine - Gastroenterology	100756 (Wisconsin)	Secondary
390200000X	Student In An Organized Health Care Education/training Program	(* (Not Available))	Secondary

Medical Facilities Affiliation

Facility Name	Location	Facility Type
Suny/stony Brook University Hospital	Stony brook, NY	Hospital
Aurora Baycare Medical Ctr	Green bay, WI	Hospital

Group Practice Association

Group Practice Name	Group PECOS PAC ID	No. of Members
Stony Brook Internists University Faculty Practice Corporation	9133019821	373
Ascension Medical Group-fox Valley Wisconsin Inc	0244142420	240
Aurora Medical Group, Inc.	6709794258	3269

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Alexandra Guillaume allows following entities to bill medicare on her behalf.

Entity Name	Canton-potsdam Hospital
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1568548782 PECOS PAC ID: 6204827280 Enrollment ID: O20040519000761

Entity Name	Stony Brook Internists University Faculty Practice Corporation
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1356380471 PECOS PAC ID: 9133019821 Enrollment ID: O20040524000844

Entity Name	St Josephs Medical Pc
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1942501747 PECOS PAC ID: 4688855844 Enrollment ID: O20110221000744

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Alexandra Guillaume is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing Address	Practice Location Address
Alexandra Guillaume, MD Po Box 1554, Stony Brook, NY 11790-0988 Ph: (631) 444-0650	Alexandra Guillaume, MD 3 Technology Dr, East Setauket, NY 11733-4064 Ph: (631) 444-5220

Reviews and Comments

Internal Medicine Doctors in East Setauket, NY

Dr. William H Greene, M.D. Gastroenterology Medicare: Not Enrolled in Medicare Practice Location: 205 N Belle Mead Ave, East Setauket, NY 11733 Phone: 631-444-1660
Dr. Ellen Li, MD Gastroenterology Medicare: Not Enrolled in Medicare Practice Location: 3 Technology Dr, East Setauket, NY 11733 Phone: 631-444-5220
Dr. Diane Klein-ritter, M.D. Gastroenterology Medicare: Accepting Medicare Assignments Practice Location: 205 N Belle Mead Ave, East Setauket, NY 11733 Phone: 631-444-4630
Ms. Larisa V Venezia, DO Gastroenterology Medicare: Not Enrolled in Medicare Practice Location: 46 Route 25a, Suite 6, East Setauket, NY 11733 Phone: 631-689-1444 Fax: 631-689-1448
Nardeen Mickail, MD Gastroenterology Medicare: Accepting Medicare Assignments Practice Location: 14 Technology Dr, Suite 10, East Setauket, NY 11733 Phone: 631-689-5400 Fax: 631-689-8247
David M Franko, MD Gastroenterology Medicare: Accepting Medicare Assignments Practice Location: 45 Research Way, Suite 008 & 108, East Setauket, NY 11733 Phone: 631-941-2704 Fax: 631-941-2009
Christopher M Cesa, M.D. Gastroenterology Medicare: Accepting Medicare Assignments Practice Location: 45 Research Way, Suite 008 & 108, East Setauket, NY 11733 Phone: 631-941-2704 Fax: 631-941-2009

Alexandra Guillaume, MD - Medicare Gastroenterology in East Setauket, NY