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Karen P Williams, PH.D.

Clinical Psychologist in Rancho Cucamonga, CA · enumerated 2007 · practices at Dr Denise Persichino Do Inc.

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

National Provider Identifier

1619004173

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Registry record

Entity type Individual (Type 1)
Name Karen P Williams
Credential PH.D.
Sex Female
Practice address 10737 Laurel St Ste 230, Rancho Cucamonga, CA, 91730
Phone (909) 989-5556
Fax (909) 989-5558
Enumeration date Feb 28, 2007
Last updated in NPPES Apr 26, 2023

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY12198 (CA) Primary
103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License PSY12198 (CA) Secondary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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.

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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 Karen Williams?
Karen Williams is registered in NPPES with the primary taxonomy of Clinical Psychologist. 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 2023-04-26.