JAROSLAW JAC MD
NPI 1326029802
Internal Medicine - Hematology & Oncology in Westborough, MA
About Jaroslaw Jac Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JAROSLAW JAC MD (NPI 1326029802) is an individual hematology & oncology provider in Westborough, Massachusetts, licensed in Massachusetts (238060) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with Umass Memorial Health - Harrington Hospital, and maintains a secondary practice location in North Conway.
NPPES Registry Identity
Specialties & Licenses 2
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.
Secondary Practice Location 1
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Jaroslaw Jac Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Areas of Expertise CMS Part B claims 6
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Umass Memorial Health - Harrington Hospital
Acute Care Hospitals · Southbridge, MAAnna Jaques Hospital
Acute Care Hospitals · Newburyport, MANortheast Hospital Corporation
Acute Care Hospitals · Beverly, MAHoly Family Hospital
Acute Care Hospitals · Methuen, MAMemorial Hospital, The
Critical Access Hospitals · North Conway, NHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01581 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 17
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WESTBOROUGH, MA 01581
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Jaroslaw Jac's NPI number?
The NPI number for Jaroslaw Jac is 1326029802. It was assigned to this individual provider in the NPPES registry on November 10, 2005.
Where is Jaroslaw Jac located?
Jaroslaw Jac practices at 150 Flanders Rd, Westborough, MA 01581. The listed phone number is (508) 870-2222.
What is Jaroslaw Jac's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Jaroslaw Jac enrolled in Medicare?
Yes. Jaroslaw Jac is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
What insurance does Jaroslaw Jac accept?
Health plans from Ambetter from NH Healthy Families, Anthem Blue Cross and Blue Sheld, Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Jaroslaw Jac as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Jaroslaw Jac affiliated with any hospitals?
According to CMS data, Jaroslaw Jac is affiliated with Umass Memorial Health - Harrington Hospital, Anna Jaques Hospital, Northeast Hospital Corporation, Holy Family Hospital and Memorial Hospital, The.
When was this NPI record last updated?
The NPPES record for Jaroslaw Jac was last updated on July 2, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.
