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

Sonja Schaffer

Individual provider Family Nurse Practitioner · NPI 1336694439

Sonja Schaffer is a Nurse Practitioner in Charlton, Massachusetts. Graduated from University of Massachusetts Medical School in 2016, 10 years ago. Practices with Saint Vincent Physician Services Inc, a 72-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
10
Trained at
University of Massachusetts Medical School
Licensed in
MA
In the registry since
2016
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Practice location Address checks out

9 Trolley Crossing Rd
Charlton, MA 01507-1351
Phone: (508) 784-1278
Fax: (508) 784-1279
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 9 Trolley Crossing Rd, Charlton, MA 01507-1351 — (508) 784-1278
  • 128 Main St, Sturbridge, MA 01566-1556 — (508) 347-9240
  • 128 Main St, Sturbridge, MA 01566-1556 — (508) 347-9240

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence RN2289480 (MA)

Record details

NPI number1336694439
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorNo
NPI enumeratedAugust 18, 2016
Last updated in NPPESMay 7, 2018

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolUNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL
Graduated 2016 (10 years in practice)
Group practice Saint Vincent Physician Services Inc — 72 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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 patients69
Services billed 180 a service is one billed item, such as a visit, a test or a procedure
Average patient age64

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 Saint Vincent Physician Services Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 72 clinicians in the practice; 12 are shown here.

Other providers in Charlton