Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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William A. Freed-Pastor, MD, PHD

Individual provider Internal Medicine Physician · NPI 1982041117

William A. Freed-Pastor, MD, PHD is a Medical Oncology in Boston, Massachusetts. Graduated from Columbia University College of Physicians and Surgeons in 2013, 13 years ago. Practices with Dana-Farber Cancer Institute, Inc, a 668-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
13
Trained at
Columbia University College of Physicians and Surgeons
Licensed in
MA
In the registry since
2013
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

450 Brookline Ave
Boston, MA 02215-5450
Phone: (617) 632-4500
Fax: (617) 632-5370
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • Massachusetts General Hospital, Boston, MA 02114 — (617) 726-2865

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence L-255592 (MA)

Record details

NPI number1982041117
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedMay 29, 2013
Last updated in NPPESApril 10, 2026
Certification dateApril 10, 2026

Medicare enrollment

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

Medicare specialtyMEDICAL ONCOLOGY
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 2013 (13 years in practice)
Group practice Dana-Farber Cancer Institute, Inc. — 668 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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