Individual provider · Type 1 NPI

Marie A. Hollenhorst, MD, PhD

Hematology (Internal Medicine) Physician · Boston, MA

NPI number 1497193999 Active

Practice location

75 Francis St
Boston, MA 02115-6110

Call (617) 732-5500 Map

Other practice locations

  • 55 Fruit St, Boston, MA 02114-2621 · (617) 732-5190

Specialties and licenses

TaxonomyCodeLicense
Internal Medicine Physician 207R00000X262787 (MA)
Hematology (Internal Medicine) Physician Primary 207RH0000X262787 (MA)

Hematology (Internal Medicine) Physician: An internist with additional training who specializes in diseases of the blood, spleen and lymph. This specialist treats conditions such as anemia, clotting disorders, sickle cell disease, hemophilia, leukemia and lymphoma.

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About NPI 1497193999

Marie A. Hollenhorst, MD, PhD's National Provider Identifier is 1497193999, issued on Jun 6, 2013. The primary taxonomy on file is Hematology (Internal Medicine) Physician (207RH0000X), and the practice location is in Boston, MA. The record was last updated on Feb 11, 2026.