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

Alyssa Johnsen, MD

Individual provider Internal Medicine Physician · NPI 1326051368

Alyssa Johnsen, MD is an Internal Medicine Physician in Cambridge, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2006.

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

75 Mount Auburn St
Cambridge, MA 02138-4960
Phone: (617) 496-9506
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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 219263 (MA)

Record details

NPI number1326051368
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 14, 2006
Last updated in NPPESNovember 6, 2007
Mailing address75 Mount Auburn St, Harvard University Health Services, Cambridge, MA 02138-4960

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