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

Halsey Niles, MD

Individual provider Psychiatry Physician · NPI 1225615057

Halsey Niles, MD is a Psychiatry in Belmont, Massachusetts. Graduated from Yale University School of Medicine in 2021, 5 years ago. Practices with Mass General Brigham Medical Group Suburban Massachusetts Inc, a 532-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
5
Trained at
Yale University School of Medicine
Licensed in
MA
In the registry since
2021
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

115 Mill St
Belmont, MA 02478-1048
Phone: (617) 299-9355
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 55 Fruit St, Boston, MA 02114-2696 — (617) 726-2000

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 1016586 (MA)

Record details

NPI number1225615057
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 26, 2021
Last updated in NPPESJuly 26, 2025
Certification dateJuly 26, 2025
Mailing address115 Mill St, Belmont, MA 02478-1048

Medicare enrollment

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

Medicare specialtyPSYCHIATRY
Medical schoolYALE UNIVERSITY SCHOOL OF MEDICINE
Graduated 2021 (5 years in practice)
Group practice Mass General Brigham Medical Group Suburban Massachusetts Inc — 532 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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