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MR. MAHMOUD FATHI MAHMOUD ABD NASSAR MD
NPI 1548882137
Internal Medicine - Endocrinology, Diabetes & Metabolism in Burlington, VT

Active since May 18, 2020PECOS EnrolledAccepts Medicare Assignment
111 COLCHESTER AVE, BURLINGTON, VT 05401(802) 847-0000 Get Directions Write a Review

NPPES record last updated: August 8, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 8, 2025, Feb 24, 2025, Aug 4, 2020 and 1 more (4 updates tracked since 2020).

About Mr. Mahmoud Fathi Mahmoud Abd Nassar Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. MAHMOUD FATHI MAHMOUD ABD NASSAR MD (NPI 1548882137) is an individual endocrinology, diabetes & metabolism provider in Burlington, Vermont, licensed in Vermont (042.0018335) and active in the NPI registry since May 2020. He is enrolled in Medicare PECOS, is affiliated with Champlain Valley Physicians Hospital Medical Ctr, and is a graduate of Other (2007).

NPPES Registry Identity

NPI1548882137
Entity TypeIndividualMale
Primary Taxonomy207RE0101X
Provider Legal NameMR. MAHMOUD FATHI MAHMOUD ABD NASSARCredential: MD
Location Address111 COLCHESTER AVEBurlington, VT 05401-1473
Mailing Address111 Colchester AveBurlington, VT 05401-1473 · (802) 847-0000
Phone(802) 847-0000
Sole ProprietorNo
Medical School CMSOtherGraduated 2007
Enumeration DateMay 18, 2020
Last NPPES UpdateAugust 8, 20254 updates tracked since enumeration
NPPES CertifiedAugust 8, 2025
✔ NPI 1548882137 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
Licenses✔ Licensed in VT · 042.0018335✔ Licensed in NY · 334582
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
Also ListedInternal MedicineTaxonomy 207R00000X · License 334582-01 (NY), 042.0018335 (VT)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
111 COLCHESTER AVE, Burlington, VT 05401
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mr. Mahmoud Fathi Mahmoud Abd Nassar Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9032621255
PECOS Enrollment IDI20250624001973
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Champlain Valley Physicians Hospital Medical Ctr

Acute Care Hospitals · Plattsburgh, NY
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330250
Location75 Beekman StreetPlattsburgh, NY 12901 · Clinton County
Emergency services Birthing friendly

Central Vermont Medical Center

Acute Care Hospitals · Barre, VT
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number470001
LocationBox 547Barre, VT 05641 · Washington County
Emergency services Birthing friendly

Univ. Of Vermont - Fletcher Allen Health Care

Acute Care Hospitals · Burlington, VT
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number470003
Location111 Colchester AveBurlington, VT 05401 · Chittenden County
Emergency services Birthing friendly

Northwestern Medical Center Inc

Acute Care Hospitals · Saint Albans, VT
3/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number470024
Location133 Fairfield StreetSaint Albans, VT 05478 · Franklin County
Emergency services Birthing friendly

Porter Hospital, Inc

Critical Access Hospitals · Middlebury, VT
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number471307
Location115 Porter DriveMiddlebury, VT 05753 · Addison County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 05401 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$127.71 typical visit price
range $55.80 – $168.48
Typical copayment $31.92 (range $13.95 – $42.12)
Most-billed visit code 99204
Established Patient
$98.40 typical visit price
range $18.08 – $137.84
Typical copayment $24.60 (range $4.52 – $34.46)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ELENA KOZAKEWICH
Internal Medicine (Pulmonary Disease)
111 COLCHESTER AVE, UVM MEDICAL CENTER, DEPT OF INTERNAL MEDICINE, 222WP2
BURLINGTON, VT 05401
Chittenden County (802) 847-2700
RICHARD BOHLING CAROZZA MD
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
111 COLCHESTER AVE
BURLINGTON, VT 05401
Chittenden County (802) 847-4589
ANDREW HUY NGUYEN MD
Radiology (Diagnostic Radiology)
111 COLCHESTER AVE
BURLINGTON, VT 05401
Chittenden County (802) 847-0000
DR. KELLY CURTIS BLANCHET MD
Pediatrics
111 COLCHESTER AVE
BURLINGTON, VT 05401
Chittenden County (802) 847-2345
LINDSAY ANNE CALDARONE MD
Student in an Organized Health Care Education/Training Program
111 COLCHESTER AVE
BURLINGTON, VT 05401
Chittenden County (802) 847-2345
SHAWN LANSING
Student in an Organized Health Care Education/Training Program
111 COLCHESTER AVE
BURLINGTON, VT 05401
Chittenden County (802) 847-2345
HANNA S LOVING PHD
Pathology (Clinical Laboratory Director, Non-physician)
111 COLCHESTER AVE
BURLINGTON, VT 05401
Chittenden County (802) 847-5121
KAITLYN MARIE DILLON DNP, APRN, FNP-C
Registered Nurse (Medical-Surgical)
111 COLCHESTER AVE
BURLINGTON, VT 05401
Chittenden County (802) 847-0000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mahmoud Nassar's NPI number?

The NPI number for Mahmoud Nassar is 1548882137. It was assigned to this individual provider in the NPPES registry on May 18, 2020.

Where is Mahmoud Nassar located?

Mahmoud Nassar practices at 111 Colchester Ave, Burlington, VT 05401. The listed phone number is (802) 847-0000.

What is Mahmoud Nassar's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Mahmoud Nassar enrolled in Medicare?

Yes. Mahmoud Nassar is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Mahmoud Nassar accept?

Health plans from Anthem Blue Cross and Blue Shield list Mahmoud Nassar as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Mahmoud Nassar affiliated with any hospitals?

According to CMS data, Mahmoud Nassar is affiliated with Champlain Valley Physicians Hospital Medical Ctr, Central Vermont Medical Center, Univ. Of Vermont - Fletcher Allen Health Care, Northwestern Medical Center Inc and Porter Hospital, Inc.

When was this NPI record last updated?

The NPPES record for Mahmoud Nassar was last updated on August 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.