Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Winchester Physician Associates

Internal Medicine Physician in Woburn, MA · enumerated 2013 · authorized official Eileen Wills, Billing Manager.

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

National Provider Identifier

1538598560

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Registry record

Entity type Organization (Type 2)

Legal business name Winchester Physician Associates

Other name <Unavail>

Parent organization Winchester Physician Associates

Practice address 23 Warren Ave, Suite 100, Woburn, MA, 01801

Phone (781) 933-1198

Fax (781) 964-9675

Enumeration date Nov 12, 2013

Last updated in NPPES Nov 12, 2013

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Eileen Wills

Title Billing Manager

Phone (781) 756-7273

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 Winchester Physician Associates located?

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2013-11-12. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-11-12.