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

Individual provider Hematology & Oncology Physician · NPI 1306208905

Gregory Ivan Berk, MD is a Hematology & Oncology Physician in Dover, Massachusetts. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2016
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

133 Claybrook Rd
Dover, MA 02030-2116
Phone: (925) 719-3531
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence C51814 (CA)

Record details

NPI number1306208905
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 23, 2016
Last updated in NPPESMarch 23, 2016