Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Prof. Rebekah Mara Williams, PMHNP-BC

Psychiatric/Mental Health Nurse Practitioner in Olean, NY · enumerated 2011.

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

National Provider Identifier

1275801979

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Registry record

Entity type Individual (Type 1)

Name Prof. Rebekah Mara Williams

Credential PMHNP-BC

Sex Female

Practice address 237 Delaware Ave Ste 14&15, Olean, NY, 14760

Phone (716) 790-8847

Fax (716) 526-4161

Enumeration date Dec 8, 2011

Last updated in NPPES May 15, 2024

Taxonomy & licenses

364SP0809X Adult Psychiatric/Mental Health Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 1275801979 (NY) Secondary

163WP0808X Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License 22 605850 (NY) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License F401628-1 (NY) Primary

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 NPI 1275801979 active?

Yes, as of the latest NPPES snapshot, NPI 1275801979 is active (record last updated 2024-05-15).

How do I verify Rebekah Williams's NPI record?

Cross-check NPI 1275801979 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-05-15.