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William Greer, M.D., P.C.

Internal Medicine Physician in Paoli, PA · enumerated 2006 · authorized official William Greer, President.

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

National Provider Identifier

1578674917

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Registry record

Entity type Organization (Type 2)
Legal business name William Greer, M.D., P.C.
Other name <Unavail>
Practice address 21 Industrial Blvd, Suite 200, Paoli, PA, 19301
Phone (610) 651-0370
Fax (610) 651-7758
Enumeration date Aug 31, 2006
Last updated in NPPES Dec 31, 2012

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD056544L (PA) Primary

Authorized official

Name William Greer
Title President
Phone (610) 651-0370

Other identifiers

Identifier Type State Issuer
S104615 Other PA BLUE SHIELD

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

How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2012-12-31. Verify at npiregistry.cms.hhs.gov.
Where is William Greer, M.D., P.C. located?
The practice location on file with NPPES is in Paoli, PA.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-12-31.