Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Nathaniel Osterloo
Physical Therapist in Mequon, WI · enumerated 2024.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1174361695
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Registry record
Entity type Individual (Type 1)
Name Nathaniel Osterloo
Sex Male
Practice address 11363 N Port Washington Road, Mequon, WI, 53092
Phone (262) 833-2060
Enumeration date Jul 18, 2024
Last updated in NPPES Jul 18, 2024
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 16883-24 (WI) Primary
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 this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Nathaniel Osterloo?
Nathaniel Osterloo is registered in NPPES with the primary taxonomy of Physical Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-18.