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

Srinivas R. Viswanathan, MD, PHD

Individual provider Internal Medicine Physician · NPI 1871880294

Srinivas R. Viswanathan, MD, PHD practises Medical Oncology in Boston, Massachusetts. Graduated from Harvard Medical School in 2011, 15 years ago. Practices with Dana-Farber Cancer Institute, Inc, a 668-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
15
Trained at
Harvard Medical School
Licensed in
MA
In the registry since
2011
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

55 Fruit St Wac 615
Boston, MA 02114-2621 Not confirmed with CMS for 15 years — call before visiting
Phone: (617) 726-2674
Fax: (617) 724-0393
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 247862 (MA)

Record details

NPI number1871880294
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedJuly 6, 2011
Last updated in NPPESJuly 6, 2011

Medicare enrollment

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

Medicare specialtyMEDICAL ONCOLOGY
Also practisesHEMATOLOGY
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 2011 (15 years in practice)
Group practice Dana-Farber Cancer Institute, Inc. — 668 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 72 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. Those with a page here are linked.

Also 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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