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

Karen J Marcus, MD

Individual provider Radiation Oncology Physician · NPI 1609827666

Karen J Marcus, MD is a Radiation Oncology Physician in Boston, 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

300 Longwood Avenue Childrens Hospital Dept OF Radiation Oncology
Boston, MA 02115
Phone: (617) 355-8399
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence 70801 (MA)

Record details

NPI number1609827666
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 15, 2006
Last updated in NPPESAugust 13, 2007
Mailing address300 Longwood Avenue, Childrens Hospital Dept Of Radiation Oncology, Boston, MA 02115

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