MAURINE J. WILLIAMS MD
NPI 1669766879
Emergency Medicine in Worcester, MA
About Maurine J. Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MAURINE J. WILLIAMS MD (NPI 1669766879) is an individual emergency medicine provider in Worcester, Massachusetts, licensed in Massachusetts (260863) and active in the NPI registry since June 2011. She is enrolled in Medicare PECOS, is affiliated with Umass Memorial Healthalliance Hospitals, and maintains 5 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 5
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Maurine J. Williams 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.
Medicare Billing Reassignments
8Medicare enrollment records show Maurine Williams reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Worcester, MA 01655
- Reassigned Medicare billing, Massachusetts enrollment
- 2,902 clinicians in this Medicare group
Ayer, MA 01432
- Reassigned Medicare billing, Massachusetts enrollment
- 290 clinicians in this Medicare group
Gardner, MA 01440
- Reassigned Medicare billing, Massachusetts enrollment
- 344 clinicians in this Medicare group
Athol, MA 01331
- Reassigned Medicare billing, Massachusetts enrollment
- 324 clinicians in this Medicare group
East Boston, MA 02128
- Reassigned Medicare billing, Massachusetts enrollment
- 577 clinicians in this Medicare group
Nantucket, MA 02554
- Reassigned Medicare billing, Massachusetts enrollment
- 206 clinicians in this Medicare group
Nantucket, MA 02554
- Reassigned Medicare billing, Massachusetts enrollment
- 172 clinicians in this Medicare group
Brunswick, ME 04011
- Reassigned Medicare billing, Vermont enrollment
- 57 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Umass Memorial Healthalliance Hospitals
Acute Care Hospitals · Leominster, MABoston Medical Center
Acute Care Hospitals · Boston, MANantucket Cottage Hospital
Acute Care Hospitals · Nantucket, MABrattleboro Memorial Hospital
Acute Care Hospitals · Brattleboro, VTPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01655 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WORCESTER, MA 01655
WORCESTER, MA 01655
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 Maurine Williams's NPI number?
The NPI number for Maurine Williams is 1669766879. It was assigned to this individual provider in the NPPES registry on June 6, 2011.
Where is Maurine Williams located?
Maurine Williams practices at 55 Lake Ave N, Worcester, MA 01655. The listed phone number is (508) 421-1400.
What is Maurine Williams's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Maurine Williams enrolled in Medicare?
Yes. Maurine Williams 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.
Which organizations bill Medicare for Maurine Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Maurine Williams reassigns Medicare benefits to 8 organizations: Umass Memorial Medical Group Inc (Worcester, MA), Steward Emergency Physicians, Inc (Ayer, MA), Henry Heywood Memorial Hospital (Gardner, MA), Athol Memorial Hospital Incorporated (Athol, MA), Internal Medical Associates-Ebnhc (East Boston, MA) and 3 more organizations, listed in the Medicare section above. Each 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 Maurine Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Maurine Williams accept?
Health plans from Anthem Blue Cross and Blue Shield and WellSense Health Plan list Maurine Williams 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 Maurine Williams affiliated with any hospitals?
According to CMS data, Maurine Williams is affiliated with Umass Memorial Healthalliance Hospitals, Boston Medical Center, Nantucket Cottage Hospital and Brattleboro Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Maurine Williams was last updated on December 1, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Maurine J. Williams, MD · NPI 1669766879
Emergency Medicine physician in Worcester, Massachusetts. Individual provider, active in the CMS NPPES registry since June 6, 2011.
## Identity
- **NPI:** 1669766879 (Entity type: Individual)
- **Enumerated:** June 6, 2011
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 260863 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 LAKE AVE N, Worcester, MA 01655-0002
- **Phone:** (508) 421-1400 · **Fax:** (508) 421-1490
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 8 organizations under Medicare reassignment (form CMS-855R): Umass Memorial Medical Group Inc (NPI 1760445373, Worcester, MA); Steward Emergency Physicians, Inc (NPI 1780971275, Ayer, MA); Henry Heywood Memorial Hospital (NPI 1205448701, Gardner, MA); Athol Memorial Hospital Incorporated (NPI 1336120047, Athol, MA); Internal Medical Associates-Ebnhc (NPI 1558481879, East Boston, MA); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Louisville School Of Medicine, class of 2011
## Record status
- **NPPES last updated:** December 1, 2020
- **Other identifiers:** Medicaid 110100636A (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1669766879) · Data from the CMS NPPES public registry.