Individual provider · Type 1 NPI

Steven Jay Isakoff, MD PHD

Hematology & Oncology Physician · Boston, MA

NPI number 1447205042 Active

Practice location

55 Fruit St
Boston, MA 02114-2621

Call (617) 726-6500 Map

Fax (617) 724-1079

Mailing address

PO Box 9142, Mass General Physicians Organization Inc
Charlestown, MA 02129-9142

Other practice locations

  • 75 Francis St, Boston, MA 02115-6110 · (617) 732-5500
  • 1153 Centre St, Jamaica Plain, MA 02130-3446 · (617) 724-4000

Specialties and licenses

TaxonomyCodeLicense
Hematology & Oncology Physician Primary 207RH0003X218952 (MA)
Medical Oncology Physician 207RX0202X218952 (MA)
Internal Medicine Physician 207R00000X218952 (MA)

Hematology & Oncology Physician: An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

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About NPI 1447205042

Steven Jay Isakoff, MD PHD's National Provider Identifier is 1447205042, issued on May 23, 2006. The primary taxonomy on file is Hematology & Oncology Physician (207RH0003X), and the practice location is in Boston, MA. The record was last updated on Aug 11, 2026.