Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Kirsten Marie Sax, CNP, DNP
Nurse Practitioner in Hudson, WI · enumerated 2023.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1588440523
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Registry record
Entity type Individual (Type 1)
Name Kirsten Marie Sax
Credential CNP, DNP
Sex Female
Practice address 411 Stageline Rd, Hudson, WI, 54016
Phone (715) 531-6700
Fax (715) 531-6701
Enumeration date Sep 6, 2023
Last updated in NPPES Dec 2, 2024
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 10725 (MN) Secondary
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 16054 (WI) Primary
DNP · Doctor of Nursing Practice: A clinical doctorate for advanced practice nurses.
About the DNP credential
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.
Frequently asked questions
Is NPI 1588440523 active?
Yes, as of the latest NPPES snapshot, NPI 1588440523 is active (record last updated 2024-12-02).
How do I verify Kirsten Sax's NPI record?
Cross-check NPI 1588440523 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Dan Krakora Dermatology Physician · Hudson, WI NPI 1548622863 Janelle Niebeling Occupational Therapist · Hudson, WI NPI 1285188037 Brenda Eckerman Physical Therapist · Hudson, WI NPI 1881232148 Abigail Montez Physical Therapist · Hudson, WI NPI 1457984791 Kimberly Webb Physical Therapist · Hudson, WI NPI 1699308593 Megan Bennett Occupational Therapist · Hudson, WI NPI 1457136160 Ryan Schwantes Audiologist · Hudson, WI NPI 1720874928
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-02.