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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

PETER N DIONISOPOULOS MD
NPI 1952499196
Internal Medicine - Cardiovascular Disease in Waukesha, WI

Active since October 11, 2006
721 AMERICAN AVE STE 403, WAUKESHA, WI 53188(262) 549-1516 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

About Peter N Dionisopoulos Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

PETER N DIONISOPOULOS MD (NPI 1952499196) is an individual cardiovascular disease provider in Waukesha, Wisconsin, licensed in Nebraska (20414) and active in the NPI registry since October 2006. He maintains a secondary practice location in Lincoln.

NPPES Registry Identity

NPI1952499196
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NamePETER N DIONISOPOULOSCredential: MD
Location Address721 AMERICAN AVE STE 403Waukesha, WI 53188-5071
Mailing Address721 American Ave Ste 403Waukesha, WI 53188-5071 · (262) 549-1516
Phone(262) 549-1516
Sole ProprietorNo
Enumeration DateOctober 11, 2006
Last NPPES UpdateSeptember 29, 2026
✔ NPI 1952499196 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in NE · 20414
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
721 AMERICAN AVE STE 403, Waukesha, WI 53188
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Secondary Practice Location 1

Location 17440 S 91st StLincoln, NE 68526-9797 · Phone (402) 489-6555 · Fax (402) 328-3770

Other Identifiers 16

Medicaid47070592301NE
Medicaid10026072200NE
Medicaid10026072600NE
Medicaid2454884OH
Medicaid47070592300NE
Medicaid10026072000NE
Medicaid10026072400NE
Medicaid2525055IA
Medicaid47070592305NE
Medicaid47070592313NE
Medicaid03037221NY
Medicaid100411930AKS
Medicaid47070592306NE
Medicaid10026072500NE
Medicaid47070592302NE
Medicaid10026072300NE

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

TAMMY JOHNSEN NP
Nurse Practitioner
721 AMERICAN AVE STE 403
WAUKESHA, WI 53188
Waukesha County (262) 549-1516

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Peter Dionisopoulos's NPI number?

The NPI number for Peter Dionisopoulos is 1952499196. It was assigned to this individual provider in the NPPES registry on October 11, 2006.

Where is Peter Dionisopoulos located?

Peter Dionisopoulos practices at 721 American Ave Ste 403, Waukesha, WI 53188. The listed phone number is (262) 549-1516.

What is Peter Dionisopoulos's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

When was this NPI record last updated?

The NPPES record for Peter Dionisopoulos was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.