William Rvemke Knowlton, PHD
Clinical Psychologist · Atascadero, CA
William Rvemke Knowlton, PHD is a clinical psychologist with a practice address in Atascadero, California, and NPI 1497780332, issued on Jul 11, 2006. Check the license (California PSY10469, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William Rvemke Knowlton
- Credential
- PHD
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- PSY10469 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10333 EL Camino Real, Atascadero, CA 93422
- Phone
- (805) 468-2000
- Enumerated
- Jul 11, 2006
- Record last updated
- Sep 11, 2025
- Fax
- (805) 466-6011
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 12,647 in California → Look up another NPI →
Also registered at 10333 EL Camino Real
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joseph Abrahamson, MDForensic Psychiatry Physician1750309423
- Ajibade Adeladan, MDPsychiatry Physician1013178763
- Henry Ahlstrom, PH.D.Clinical Psychologist1619945870
- Moghees AhmedPsychiatry Physician1124333125
- Hossein Akhavan, M.D.Internal Medicine Physician1871779942
- Paula Aloi, PSYDClinical Psychologist1306134630
Verify William Rvemke Knowlton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PSY10469Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William Rvemke Knowlton among 12,647 clinical psychologist records in California
William Rvemke Knowlton, PHD is one of 12,647 clinical psychologist records with a practice address in California. 9% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 80% newer
- In a Medicare fileNo · 9% of these records are
- In the CMS Doctors and Clinicians fileNo · 19% of these records are
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
96 clinical psychologist records list a practice address in Atascadero
They are 96 of the 992 NPPES records with a practice address in Atascadero, and 12,647 clinical psychologist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 12,647 in California → Every provider in Atascadero → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Henry Ahlstrom, PH.D.Atascadero, CA 934221619945870
- Leticia Arellano, PSY.D.Atascaden, CA 934221881897338
- Richard Atwood, PSYAtascadero, CA 934221366470445
- Kate Burkhardt, PHDAtascadero, CA 934221861560831
- Tzu-Chen Cheng, PSY.D.Atascadero, CA 934221710109582
- Arlene CruzAtascadero, CA 934221568657906
- Melissa Depoorter, PHD, LMFTAtascadero, CA 934221255462040
- Daryl Herzog-Perez, PHDAtascadero, CA 934221720013659
Common questions
What is William Rvemke Knowlton, PHD's NPI number?
William Rvemke Knowlton, PHD's National Provider Identifier (NPI) is 1497780332, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Rvemke Knowlton, PHD located?
The NPPES record lists a practice address at 10333 EL Camino Real, Atascadero, CA, 93422. Phone: (805) 468-2000. Providers update this record themselves, so call before visiting.
How can I verify William Rvemke Knowlton, PHD's license?
NPPES lists California license number PSY10469, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.