Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jean L Westendorf, ARNP

Nurse Practitioner in Mason City, IA · enumerated 2005.

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

National Provider Identifier

1083609929

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Registry record

Entity type Individual (Type 1)

Name Jean L Westendorf

Credential ARNP

Sex Female

Practice address 621 S Illinois Ave, Suite 100, Mason City, IA, 50401

Phone (641) 428-6900

Fax (641) 428-6909

Enumeration date Sep 16, 2005

Last updated in NPPES Jul 9, 2025

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License C039850 (IA) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 039850 (IA) Primary

Other identifiers

Identifier	Type	State	Issuer
0425017	Medicaid	IA	-
55760	Other	IA	WELLMARK BCBS

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 Jean Westendorf?

Jean Westendorf is registered in NPPES with the primary taxonomy of Nurse Practitioner. 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 2025-07-09.