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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Leonard Neil Matheson, PH.D.

Psychologist in Chico, CA · enumerated 2006.

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

National Provider Identifier

1700988540

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Registry record

Entity type Individual (Type 1)
Name Dr. Leonard Neil Matheson
Credential PH.D.
Sex Male
Practice address Chico, CA, 95973
Phone (636) 346-8869
Fax (636) 898-0954
Enumeration date Sep 2, 2006
Last updated in NPPES Dec 12, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY9294 (CA) Secondary
103T00000X Psychologist Behavioral Health & Social Service Providers · License PYR0533 (MO) Primary
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

What is the NPI number for Leonard Matheson?
The National Provider Identifier (NPI) for Leonard Matheson is 1700988540, a Type 1 (individual) record in the CMS NPPES registry.
Where does Leonard Matheson practice?
The practice location on file with NPPES is in Chico, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-12-12.