Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Eric P. Xanthopoulos, MD

Radiation Oncology Physician in Beloit, WI · enumerated 2013.

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

National Provider Identifier

1457693079

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Registry record

Entity type Individual (Type 1)

Name Dr. Eric P. Xanthopoulos

Credential MD

Sex Male

Practice address Beloit Health System Uw Cancer Center, 1670 Lee Lane, Beloit, WI, 53511

Phone (608) 364-5253

Fax (608) 364-5252

Enumeration date Mar 21, 2013

Last updated in NPPES Mar 31, 2021

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 036-146949 (IL) Secondary

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 68909-20 (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
100075966	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

Is NPI 1457693079 active?

Yes, as of the latest NPPES snapshot, NPI 1457693079 is active (record last updated 2021-03-31).

How do I verify Eric Xanthopoulos's NPI record?

Cross-check NPI 1457693079 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Angela Besaw Nurse Practitioner · Beloit, WI NPI 1508016817

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-31.