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GRABIAS MEDICAL GROUP PC
NPI 1578570537
Internal Medicine in Webster, MA

Active since August 02, 2006CLIA 22D1052799 · Waiver
340 THOMPSON RD, STE 108, WEBSTER, MA 01570(508) 949-1988(508) 949-7225 Get Directions Write a Review

NPPES record last updated: August 22, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Grabias Medical Group Pc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GRABIAS MEDICAL GROUP PC (NPI 1578570537) is a healthcare organization registered as an internal medicine in Webster, Massachusetts and active in the NPI registry since August 2006. The organization holds a CLIA Waiver certificate valid through April 4, 2028 and lists Piotr Grabias, Owner Mgr, as its authorized official.

NPPES Registry Identity

NPI1578570537
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameGRABIAS MEDICAL GROUP PC
Location Address340 THOMPSON RD, STE 108Webster, MA 01570
Mailing Address340 Thompson Rd, Ste 108Webster, MA 01570 · (508) 949-1988 · Fax (508) 949-7225
Phone(508) 949-1988
Fax(508) 949-7225
Organization SubpartNo
Authorized OfficialPiotr GrabiasOwner Mgr · (508) 949-1988
Enumeration DateAugust 2, 2006
Last NPPES UpdateAugust 22, 2020
✔ NPI 1578570537 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
340 THOMPSON RD, Webster, MA 01570
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Other Identifiers 1

Medicaid9761390MA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Grabias Medical Group Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Grabias Medical Group PC, which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.

Clinicians, nearest first (2)

Piotr Grabias, M.D.
Internal Medicine
NPI 1508847419
340 THOMPSON RD SUITE 108
Webster, MA 01570
(508) 949-1988
✔ PECOS✔ Accepts MedicareSame address
Beata Stancel Grabias, M.D.
Internal Medicine
NPI 1275514184
340 THOMPSON RD SUITE 108
Webster, MA 01570
(508) 949-1988
✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 22D1052799

Grabias Medical Group PC · Webster, MA
Active · expires Apr 4, 2028
CLIA Number22D1052799
Laboratory TypePhysician Office
Certificate Effective DateApril 5, 2026
Certificate Expiration DateApril 4, 2028
Laboratory DirectorPiotr Grabias
Laboratory Phone(508) 949-1988
Laboratory LocationGrabias Medical Group PC340 Thompson Road Suite 108, Webster, MA 01570
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

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 Grabias Medical Group PC's NPI number?

The NPI number for Grabias Medical Group PC is 1578570537. It was assigned to this organization in the NPPES registry on August 2, 2006.

Where is Grabias Medical Group PC located?

Grabias Medical Group PC is located at 340 Thompson Rd Ste 108, Webster, MA 01570. The listed phone number is (508) 949-1988.

What is Grabias Medical Group PC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Grabias Medical Group PC enrolled in Medicare?

Yes. Grabias Medical Group PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Grabias Medical Group PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Internal Medicine, reassign their Medicare billing to Grabias Medical Group PC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Grabias Medical Group PC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 22D1052799) is associated with this NPI, valid through April 4, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Grabias Medical Group PC accept?

Health plans from Anthem Blue Cross and Blue Shield list Grabias Medical Group PC 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.

When was this NPI record last updated?

The NPPES record for Grabias Medical Group PC was last updated on August 22, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.