Dr. Robert Barry Drezner, PH.D
Dr. Robert Barry Drezner is a Clinical Psychologist provider (Psychologist) practicing in Thousand Oaks, CA, registered in the NPPES registry with NPI 1699748202 since 2006. The credential PHD stands for Doctor of Philosophy.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1699748202 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Robert Barry Drezner |
| Credential | PH.D |
| Sex | Male |
| Practice address | Thousand Oaks, CA, 91360 |
| Phone | 8055237429 |
| Fax | 8055238671 |
| Enumeration date | 2006-02-13 |
| Last updated in NPPES | 2007-07-08 |
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 | PSY 6167 | 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: Robert Drezner, PH.D NPI: 1699748202 Taxonomy: 103TC0700X (Clinical Psychologist) Address: Thousand Oaks, CA, 91360
Verify this record
Cross-check NPI 1699748202 against the authoritative CMS record: view Dr. Robert Barry Drezner 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.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.