John Michael Warrington, PH.D.
Psychologist · Duarte, CA
John Michael Warrington, PH.D. is a psychologist with a practice address in Duarte, California, and NPI 1639188535, issued on Aug 7, 2006. Check the license (California PSY 20819, 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
- John Michael Warrington
- Credential
- PH.D.
- Primary taxonomy
- Psychologist 103T00000X
- License number
- PSY 20819 CA
Self-reported in NPPES; status is on the state search - Practice location
- 931 Buena Vista St, Duarte, CA 91010
- Phone
- (626) 548-6122
- Enumerated
- Aug 7, 2006
- Record last updated
- Mar 15, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (626) 236-4084
- Entity
- Type 1 · individual
8 nearest psychologist records → All 7,304 in California → Look up another NPI →
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Verify John Michael Warrington in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PSY 20819Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John Michael Warrington among 7,304 psychologist records in California
John Michael Warrington, PH.D. is one of 7,304 psychologist records with a practice address in California. 6% 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, 82% newer
- In a Medicare fileNo · 6% of these records are
- In the CMS Doctors and Clinicians fileNo · 14% of these records are
- Record last updated2016 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103T00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychologist providers in California
There are 7,304 psychologist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,304 in California → Every provider in Duarte → Psychologist nationwide →
The 8 psychologist records with the nearest ZIP codes
- Stephanie Davidson, PSY.D.Duarte, CA 910101356535256
- Maureen Davis, PSY DDuarte, CA 910101679462675
- Gregory Endelman, LEPDuarte, CA 910101265174940
- Haig Kojian, PH.D.Duarte, CA 910101215069778
- Martin Perez, PHDDuarte, CA 910101851462469
- Andrea Thornton, PHDDuarte, CA 910101033295613
- Sean TobinDuarte, CA 910101619606092
- Elanna Lazaruk, PSY.D.La Canada Flintridge, CA 910111558707869
Common questions
What is John Michael Warrington, PH.D.'s NPI number?
John Michael Warrington, PH.D.'s National Provider Identifier (NPI) is 1639188535, issued on Aug 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Michael Warrington, PH.D. located?
The NPPES record lists a practice address at 931 Buena Vista St, Duarte, CA, 91010. Phone: (626) 548-6122. Providers update this record themselves, so call before visiting.
How can I verify John Michael Warrington, PH.D.'s license?
NPPES lists California license number PSY 20819, 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.