Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Linda Kaiser, APRN

Primary Care Nurse Practitioner in O Fallon, MO · enumerated 2006.

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

National Provider Identifier

1629031851

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Registry record

Entity type Individual (Type 1)

Name Linda Kaiser

Credential APRN

Sex Female

Practice address 844 Waterbury Falls Dr, O Fallon, MO, 63368

Phone (314) 652-4100

Fax (314) 289-6360

Enumeration date Apr 10, 2006

Last updated in NPPES Apr 30, 2013

Taxonomy & licenses

363LP2300X Primary Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 083502 (MO) Primary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN 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

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 Linda Kaiser?

Linda Kaiser is registered in NPPES with the primary taxonomy of Primary Care Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-04-30.