Stephen William Hill, PH.D.
Clinical Psychologist · Diamond Bar, CA
Stephen William Hill, PH.D. is a clinical psychologist with a practice address in Diamond Bar, California, and NPI 1952424699, issued on Apr 9, 2007. Check the license (California PSY12056, 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
- Stephen William Hill
- Credential
- PH.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- PSY12056 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1930 S Brea Canyon RD, Diamond Bar, CA 91765
- Phone
- (909) 896-0518
- Enumerated
- Apr 9, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (909) 594-7010
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 12,647 in California → Look up another NPI →
Verify Stephen William Hill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PSY12056Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Stephen William Hill among 12,647 clinical psychologist records in California
Stephen William Hill, PH.D. 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 2007, is newer than 20% of them.
- NPI issued2007 · 20% of these records are older, 57% newer
- In a Medicare fileNo · 9% of these records are
- In the CMS Doctors and Clinicians fileNo · 19% of these records are
- Record last updated2007 · 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).
11 clinical psychologist records list a practice address in Diamond Bar
They are 11 of the 598 NPPES records with a practice address in Diamond Bar, 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 Diamond Bar → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Barbara Ammon, PH.D.Diamond Bar, CA 917651588749915
- Melissa Campitelli-Smith, PSY.D.Diamond Bar, CA 917651891809786
- Ronda Hampton, PH.D.Diamond Bar, CA 917651891820718
- Allegra Klacsmann, PH.D.Diamond Bar, CA 917651871788414
- Justin Leiter-McBeth, PHDDiamond Bar, CA 917651679395701
- Saadia McLeod, PH.D.Diamond Bar, CA 917651407938129
- Stephen Meyer, PH.D.Diamond Bar, CA 917651225051006
- Richard Ortigo, PSYDDiamond Bar, CA 917651154551158
Common questions
What is Stephen William Hill, PH.D.'s NPI number?
Stephen William Hill, PH.D.'s National Provider Identifier (NPI) is 1952424699, issued on Apr 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Stephen William Hill, PH.D. located?
The NPPES record lists a practice address at 1930 S Brea Canyon RD, Diamond Bar, CA, 91765. Phone: (909) 896-0518. Providers update this record themselves, so call before visiting.
How can I verify Stephen William Hill, PH.D.'s license?
NPPES lists California license number PSY12056, 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.