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William F. Flader MD, Pllc

Clinic/Center in Setauket, NY · enumerated 2008 · authorized official William Flader, President.

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

National Provider Identifier

1245488337

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Registry record

Entity type Organization (Type 2)
Legal business name William F. Flader MD, Pllc
Other name <Unavail>
Practice address 100 N Country Rd, Setauket, NY, 11733
Phone (631) 941-3137
Enumeration date Sep 3, 2008
Last updated in NPPES Sep 3, 2008

Taxonomy & classification

261Q00000X Clinic/Center Ambulatory Health Care Facilities · License 163266 (OK) Primary

Authorized official

Name William Flader
Title President
Phone (631) 941-3137

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.

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Frequently asked questions

What type of organization is William F. Flader MD, Pllc?
William F. Flader MD, Pllc is registered in NPPES as a Clinic/Center (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-09-03.