Individual provider · Type 1 NPI

Jaroslaw Jac, MD

Hematology & Oncology Physician · Westborough, MA

NPI number 1326029802 Active

Practice location

150 Flanders Rd
Westborough, MA 01581-1017

Mailing address

15 Hospital Dr
York, ME 03909-1011

Other practice locations

  • 3073 White Mountain Hwy, North Conway, NH 03860-7101 · (603) 356-4904
  • 580 Court St, Keene, NH 03431-1718 · (603) 354-5400

Specialties and licenses

TaxonomyCodeLicense
Internal Medicine Physician 207R00000X238060 (MA)
Hematology & Oncology Physician 207RH0003X35312 (NH)
Internal Medicine Physician 207R00000X35312 (NH)
Hematology & Oncology Physician Primary 207RH0003X238060 (MA)
Hematology & Oncology Physician 207RH0003XJ9106 (TX)
Hematology & Oncology Physician 207RH0003XMD13980 (ME)

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.

19 other providers at this address

About NPI 1326029802

Jaroslaw Jac, MD's National Provider Identifier is 1326029802, issued on Nov 10, 2005. The primary taxonomy on file is Hematology & Oncology Physician (207RH0003X), and the practice location is in Westborough, MA. The record was last updated on Jul 24, 2026.