Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Kay Winarski, NP

Nurse Practitioner in Menomonee Falls, WI · enumerated 2006 · practices at Medical Associates Health Centers-Occupational Health.

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

National Provider Identifier

1245296466

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Registry record

Entity type Individual (Type 1)

Name Mary Kay Winarski

Credential NP

Sex Female

Practice address W180n7950 Town Hall Rd, Menomonee Falls, WI, 53051

Phone (262) 255-2500

Enumeration date Apr 25, 2006

Last updated in NPPES Oct 5, 2010

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 74780 (WI) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

Other identifiers

Identifier	Type	State	Issuer
43935300	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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Mary Kay Winarski's NPI record?

Cross-check NPI 1245296466 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1245296466 active?

Yes, as of the latest NPPES snapshot, NPI 1245296466 is active (record last updated 2010-10-05).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-10-05.