Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Nathaniel R. Greenbaum, MD

Individual provider Anesthesiology Physician · NPI 1952832206

Dr. Nathaniel R. Greenbaum, MD practises Anesthesiology in Boston, Massachusetts. Qualified in 2016, 10 years ago. Practices with Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc, a 1,676-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
10
Licensed in
MA
In the registry since
2017
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 Dept OF Anesthesiology
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.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 286819 (MA)

Record details

NPI number1952832206
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 27, 2017
Last updated in NPPESSeptember 22, 2021
Certification dateSeptember 22, 2021

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 2016 (10 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 patients199
Services billed 215 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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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