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

Antea Jean Demarsilis, MD

Individual provider Endocrinology, Diabetes & Metabolism Physician · NPI 1578186326

Antea Jean Demarsilis, MD practises Internal Medicine in Boston, Massachusetts. Graduated from University of Connecticut School of Medicine in 2020, 6 years ago. Practices with Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc, a 1,676-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
6
Trained at
University of Connecticut School of Medicine
Licensed in
MA
In the registry since
2020
Specialties on file
2
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

330 Brookline Ave
Boston, MA 02215-5400
Phone: (617) 667-7000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 119 Belmont St, Worcester, MA 01605-2903 — (508) 334-3206
  • 55 Lake Ave N, Worcester, MA 01655-0002 — (508) 334-3206

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence 1018242 (MA)
Hospitalist Physician Taxonomy 208M00000X · Licence PHY100429 (MA)

Record details

NPI number1578186326
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 27, 2020
Last updated in NPPESMarch 20, 2026
Certification dateMarch 20, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CONNECTICUT SCHOOL OF MEDICINE
Graduated 2020 (6 years in practice)
Group practice Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc — 1676 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 patients34
Services billed 101 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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 Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1676 clinicians in the practice; 12 are shown here.

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