Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Michael E Onsrud, PTA

Physical Therapy Assistant in Watertown, WI · enumerated 2015 · practices at Marquardt Memorial Manor, Inc..

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

National Provider Identifier

1114306875

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Registry record

Entity type Individual (Type 1)

Name Mr. Michael E Onsrud

Credential PTA

Sex Male

Practice address 1020 Hill St, Watertown, WI, 53098

Phone (920) 261-0400

Enumeration date May 27, 2015

Last updated in NPPES May 27, 2015

Taxonomy & licenses

225200000X Physical Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 2257-19 (WI) Primary

Other identifiers

Identifier	Type	State	Issuer
1629071121	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.

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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 Michael Onsrud?

Michael Onsrud is registered in NPPES with the primary taxonomy of Physical Therapy Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-05-27.