Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Bader, M.D.

Internal Medicine Physician in Carnegie, PA · enumerated 2006.

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

National Provider Identifier

1871563411

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Registry record

Entity type Individual (Type 1)

Name William Bader

Credential M.D.

Sex Male

Practice address 102 Broadway St Ste 100, Carnegie, PA, 15106

Phone (412) 279-0320

Fax (412) 279-8703

Enumeration date Jan 25, 2006

Last updated in NPPES Nov 1, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD-018581E (PA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
0009406870002	Medicaid	PA	-
110092359	Other	-	RAILROAD MEDICARE PTAN

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 does William Bader practice?

The practice location on file with NPPES is in Carnegie, PA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for William Bader?

The National Provider Identifier (NPI) for William Bader is 1871563411, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-11-01.