John E. Leonard, PH.D.
John E. Leonard is a Clinical Psychologist provider (Psychologist) practicing in Davis, CA, registered in the NPPES registry with NPI 1336226083 since 2006. The credential PHD stands for Doctor of Philosophy.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1336226083 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | John E. Leonard |
| Credential | PH.D. |
| Sex | Male |
| Practice address | Davis, CA, 95616 |
| Phone | 5307566438 |
| Fax | 5304190774 |
| Enumeration date | 2006-11-01 |
| Last updated in NPPES | 2013-02-08 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103TC0700X | Clinical Psychologist | Primary | PSY12821 | CA |
PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential
Copy-ready billing details
Provider: John Leonard, PH.D. NPI: 1336226083 Taxonomy: 103TC0700X (Clinical Psychologist) Address: Davis, CA, 95616
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Cross-check NPI 1336226083 against the authoritative CMS record: view John E. Leonard on the official NPPES registry .
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 or validate an NPI number.
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2013-02-08.