Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Joseph M. Williams, M.D.,P.C.

Ophthalmology Physician in Worcester, MA · enumerated 2007 · authorized official Anita Fresolo, Billing Coordinator.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1417150194

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Joseph M. Williams, M.D.,P.C.

Practice address 591 Lincoln St, Worcester, MA, 01605

Phone (508) 853-2020

Fax (508) 459-5082

Enumeration date Jun 8, 2007

Last updated in NPPES Dec 3, 2010

Taxonomy & classification

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 150862 (MA) Primary

Authorized official

Name Anita Fresolo

Title Billing Coordinator

Phone (508) 853-2020

Other identifiers

Identifier	Type	State	Issuer
M19008	Other	MA	BLUE CROSS BLUE SHIELD
PR39113830002	Other	MA	CIGNA CT GENERAL
3155862	Medicaid	MA	-
59344	Other	MA	CIGNA
150862	Other	MA	TUFTS
152191	Other	MA	HARVARD PILGRIM HEALTH
99429	Other	MA	FALLON COMM HEALTH

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

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

The practice location on file with NPPES is in Worcester, MA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2010-12-03. Verify at npiregistry.cms.hhs.gov.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-12-03.