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

Zachary Saxe Sager, MD

Individual provider Psychiatry Physician · NPI 1396183125

Zachary Saxe Sager, MD practises Psychiatry in Boston, Massachusetts. Qualified in 2013, 13 years ago. Practices with Dana-Farber Cancer Institute, Inc, a 668-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
13
Licensed in
MA
In the registry since
2013
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

450 Brookline Ave
Boston, MA 02215
Phone: (617) 632-6464
Fax: (617) 632-6180
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 550 S Jackson St, Louisville, KY 40202-1622 — (502) 852-5395

Specialties & licences

Hospice and Palliative Medicine (Psychiatry & Neurology) Physician (primary) Taxonomy 2084H0002X · Licence 271243 (MA)
Psychiatry Physician Taxonomy 2084P0800X · Licence 271243 (MA)

Record details

NPI number1396183125
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 14, 2013
Last updated in NPPESApril 11, 2019

Medicare enrollment

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

Medicare specialtyPSYCHIATRY
Also practisesHOSPICE/PALLIATIVE CARE
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Dana-Farber Cancer Institute, Inc. — 668 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients97
Services billed 259 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

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.

Affiliated with 1 hospital, which CMS identifies by certification number only.

Colleagues at Dana-Farber Cancer Institute, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 668 clinicians in the practice; 12 are shown here.

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