Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Margaret L Kastner, OT

Occupational Therapist in Fond Du Lac, WI · enumerated 2009.

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

National Provider Identifier

1245460096

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Registry record

Entity type Individual (Type 1)

Name Margaret L Kastner

Credential OT

Sex Female

Practice address 210 Wisconsin American Dr, Fond Du Lac, WI, 54937

Phone (920) 907-7000

Enumeration date Jul 15, 2009

Last updated in NPPES Jul 15, 2009

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 4764 (WI) Primary

OT · Occupational Therapist: A licensed therapist helping patients develop or recover skills for daily living and working. About the OT 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Margaret Kastner?

The National Provider Identifier (NPI) for Margaret Kastner is 1245460096, a Type 1 (individual) record in the CMS NPPES registry.

Where does Margaret Kastner practice?

The practice location on file with NPPES is in Fond Du Lac, WI. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-07-15.