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

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.

See every abbreviation used in this directory →

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
Mailing address133 Claybrook Rd, Dover, MA 02030-2116