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

Individual provider Internal Medicine Physician · NPI 1669505269

Dr. Karen Esther Victor, MD is an Internal Medicine Physician in Cambridge, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2007.

Licensed in
MA
In the registry since
2007
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

725 Concord Ave Ste 2000
Cambridge, MA 02138-1052
Phone: (617) 661-4600
Fax: (617) 547-9170
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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 56133 (MA)

Record details

NPI number1669505269
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 13, 2007
Last updated in NPPESMarch 7, 2019

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 patients139
Services billed 558 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

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