Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Joseph B Iselin, PHYSICAL THERAPIST

Physical Therapist in Delavan, WI · enumerated 2007.

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

National Provider Identifier

1740402536

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Registry record

Entity type Individual (Type 1)

Name Mr. Joseph B Iselin

Credential PHYSICAL THERAPIST

Sex Male

Practice address 905 E Geneva St, Delavan, WI, 53115

Phone (262) 728-1442

Fax (262) 728-6693

Enumeration date May 3, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 1336-024 (WI) Primary

Other identifiers

Identifier	Type	State	Issuer
40132100	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Joseph Iselin?

Joseph Iselin 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.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.