Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mrs. Marguerite Marie Guillaume, NP

Individual provider Family Nurse Practitioner · NPI 1982158515

Mrs. Marguerite Marie Guillaume, NP is a Nurse Practitioner in South Weymouth, Massachusetts. Qualified in 2016, 10 years ago. Practices with Coastal Medical Associates, a 446-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
10
Licensed in
MA
In the registry since
2016
Specialties on file
2
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

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Practice location Address checks out

55 Fogg Rd
South Weymouth, MA 02190-2432
Phone: (781) 624-8928
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 235 N Pearl St, Brockton, MA 02301-1794 — (508) 427-3000

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence 2279920 (MA)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence RN2279920 (MA)

Record details

NPI number1982158515
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorYes
NPI enumeratedAugust 11, 2016
Last updated in NPPESMarch 17, 2025
Certification dateMarch 17, 2025

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice Coastal Medical Associates — 446 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients271
Services billed 790 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Coastal Medical Associates

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 446 clinicians in the practice; 12 are shown here.

Other providers in South Weymouth