Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Phyllis Christine Bessey, NP

Nurse Practitioner in Olean, NY · enumerated 2005.

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

National Provider Identifier

1023003399

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Registry record

Entity type Individual (Type 1)

Name Phyllis Christine Bessey

Credential NP

Sex Female

Practice address 535 Main St, Olean, NY, 14760

Phone (716) 372-0141

Fax (716) 373-6632

Enumeration date Sep 13, 2005

Last updated in NPPES Mar 30, 2010

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License F334618 (NY) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP 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 Phyllis Bessey practice?

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

What is the NPI number for Phyllis Bessey?

The National Provider Identifier (NPI) for Phyllis Bessey is 1023003399, 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 2010-03-30.