Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Karen L Gastrau, APNP
Nurse Practitioner in Milwaukee, WI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1750335204
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Registry record
Entity type Individual (Type 1)
Name Karen L Gastrau
Credential APNP
Sex Female
Practice address 5928 W Vliet St, Suite 100a, Milwaukee, WI, 53208
Phone (414) 771-0212
Enumeration date May 20, 2006
Last updated in NPPES Nov 19, 2021
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 940 (WI) Primary
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 43859900 | 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.
Frequently asked questions
What is the NPI number for Karen Gastrau?
The National Provider Identifier (NPI) for Karen Gastrau is 1750335204, a Type 1 (individual) record in the CMS NPPES registry.
Where does Karen Gastrau practice?
The practice location on file with NPPES is in Milwaukee, WI. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-19.