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JOSEPH M. WILLIAMS, M.D.,P.C.
NPI 1417150194
Ophthalmology in Worcester, MA

Active since June 08, 2007
591 LINCOLN ST, WORCESTER, MA 01605(508) 853-2020(508) 459-5082 Get Directions Write a Review

NPPES record last updated: December 3, 2010. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Joseph M. Williams, M.d.,p.c. NPPES

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

JOSEPH M. WILLIAMS, M.D.,P.C. (NPI 1417150194) is a healthcare organization registered as an ophthalmology in Worcester, Massachusetts and active in the NPI registry since June 2007. The organization lists Anita Fresolo, Billing Coordinator, as its authorized official.

NPPES Registry Identity

NPI1417150194
Entity TypeOrganization
Primary Taxonomy207W00000X
Legal Business NameJOSEPH M. WILLIAMS, M.D.,P.C.
Location Address591 LINCOLN STWorcester, MA 01605-1901
Mailing Address591 Lincoln StWorcester, MA 01605-1901 · (508) 853-2020 · Fax (508) 459-5082
Phone(508) 853-2020
Fax(508) 459-5082
Organization SubpartNo
Authorized OfficialAnita FresoloBilling Coordinator · (508) 853-2020
Enumeration DateJune 8, 2007
Last NPPES UpdateDecember 3, 2010
✔ NPI 1417150194 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License✔ Licensed in MA · 150862
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
591 LINCOLN ST, Worcester, MA 01605
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Other Identifiers 8

OtherM19008MA · Blue Cross Blue Shield
Other59344MA · Cigna
Other152191MA · Harvard Pilgrim Health
Medicare UPIN0014857
Medicaid3155862MA
Other99429MA · Fallon Comm Health
Other150862MA · Tufts
OtherPR39113830002MA · Cigna Ct General

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Joseph M. Williams, M.d.,p.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by January 31, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateMassachusettsEnrollment IDO20100322000349Non-DME Part B · Clinic/Group PracticeDue dateJanuary 31, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Joseph M. Williams, M.D.,p.C., which bills Medicare for the services this clinician delivers.

Clinician (1)

Joseph Williams, M.D.
Ophthalmology
NPI 1467567438
591 LINCOLN ST
Worcester, MA 01605
(508) 853-2020
✔ 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.

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 Joseph M. Williams, M.D.,p.C.'s NPI number?

The NPI number for Joseph M. Williams, M.D.,p.C. is 1417150194. It was assigned to this organization in the NPPES registry on June 8, 2007.

Where is Joseph M. Williams, M.D.,p.C. located?

Joseph M. Williams, M.D.,p.C. is located at 591 Lincoln St, Worcester, MA 01605. The listed phone number is (508) 853-2020.

What is Joseph M. Williams, M.D.,p.C.'s specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Joseph M. Williams, M.D.,p.C. enrolled in Medicare?

Yes. Joseph M. Williams, M.D.,p.C. is registered in the Medicare PECOS enrollment system.

When is Joseph M. Williams, M.D.,p.C.'s Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Massachusetts, Clinic/Group Practice) is due for revalidation by January 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Joseph M. Williams, M.D.,p.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Ophthalmology) reassigns their Medicare billing to Joseph M. Williams, M.D.,p.C.. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Joseph M. Williams, M.D.,p.C. accept?

Health plans from Anthem Blue Cross and Blue Shield list Joseph M. Williams, M.D.,p.C. 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 Joseph M. Williams, M.D.,p.C. was last updated on December 3, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.