Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katherine Owczarzak, RN

Registered Nurse in Buffalo, NY · enumerated 2012 · practices at Oasis Transportation Services Inc.

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

National Provider Identifier

1407126261

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Registry record

Entity type Individual (Type 1)

Name Katherine Owczarzak

Credential RN

Sex Female

Practice address 1235 Main St, Buffalo, NY, 14209

Phone (716) 884-5797

Fax (716) 884-4938

Enumeration date Jan 10, 2012

Last updated in NPPES Jan 10, 2012

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 621270 (NY) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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

Where does Katherine Owczarzak practice?

The practice location on file with NPPES is in Buffalo, NY. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Katherine Owczarzak?

The National Provider Identifier (NPI) for Katherine Owczarzak is 1407126261, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-10.