Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stephen R Bartos, MD

Surgery Physician in Waukesha, WI · enumerated 2005.

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

National Provider Identifier

1083601645

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen R Bartos

Credential MD

Sex Male

Practice address 1111 Delafield St, Ste 209, Waukesha, WI, 53188

Phone (262) 542-0444

Fax (262) 542-8214

Enumeration date Sep 29, 2005

Last updated in NPPES Apr 24, 2019

Taxonomy & licenses

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 37461 (WI) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 37461 (WI) 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
32240400	Medicaid	WI	-

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

Where does Stephen Bartos practice?

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

What is the NPI number for Stephen Bartos?

The National Provider Identifier (NPI) for Stephen Bartos is 1083601645, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-04-24.