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

Individual provider Hospitalist Physician · NPI 1639253586

Sivakumar Natanasabapathy, MD is a Hospitalist in Springfield, Massachusetts. Qualified in 1994, 32 years ago. Practices with Baystate Medical Practices Inc, a 1,346-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
32
Licensed in
MA
In the registry since
2006
Specialties on file
3
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

759 Chestnut St
Springfield, MA 01199-1619
Phone: (413) 794-4320
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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 223495 (MA)
Hospitalist Physician Taxonomy 208M00000X · Licence 223495 (MA)
Geriatric Medicine (Internal Medicine) Physician Taxonomy 207RG0300X · Licence 223495 (MA)

Record details

NPI number1639253586
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 25, 2006
Last updated in NPPESFebruary 6, 2016

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1994 (32 years in practice)
Group practice Baystate Medical Practices Inc — 1346 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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