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

Individual provider Internal Medicine Physician · NPI 1912006065

Claes M Nilsson, MD is an Internal Medicine in Dedham, Massachusetts. Graduated from Yale University School of Medicine in 1973, 53 years ago. Practices with Vantage Healthcare LLC, a 69-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
53
Trained at
Yale University School of Medicine
Licensed in
MA
In the registry since
2006
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

990 Washington St Ste 203
Dedham, MA 02026-6714
Phone: (413) 543-6820
Fax: (781) 326-1384
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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 53091 (MA)

Record details

NPI number1912006065
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 22, 2006
Last updated in NPPESOctober 19, 2022
Certification dateOctober 18, 2022
Mailing address819 Worcester St, Ste 3, Springfield, MA 01151-1045

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesHEMATOLOGY/ONCOLOGY
Medical schoolYALE UNIVERSITY SCHOOL OF MEDICINE
Graduated 1973 (53 years in practice)
Group practice Vantage Healthcare Llc — 69 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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