Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Green Bay Cardiothoracic & Vascular LLC

Cardiovascular Disease Physician in Green Bay, WI · enumerated 2007 · authorized official Steven Gerndt, Owner.

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

National Provider Identifier

1659412401

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Registry record

Entity type Organization (Type 2)

Legal business name Green Bay Cardiothoracic & Vascular LLC

Practice address 720 S Van Buren St, Suite 303, Green Bay, WI, 54301

Phone (920) 433-9621

Fax (920) 433-0565

Enumeration date Feb 12, 2007

Last updated in NPPES Dec 14, 2011

Taxonomy & classification

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Steven Gerndt

Title Owner

Phone (920) 433-9621

Other identifiers

Identifier	Type	State	Issuer
32897600	Medicaid	WI	-
CG7604	Other	WI	RAILROAD MEDICARE

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 2011-12-14. Verify at npiregistry.cms.hhs.gov.

Where is Green Bay Cardiothoracic & Vascular LLC located?

The practice location on file with NPPES is in Green Bay, WI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-12-14.