NPPES file of Aug 9, 2026

Alexander Tan, PHD

Clinical Neuropsychologist · Orange, CA

Alexander Tan, PHD is a clinical neuropsychologist with a practice address in Orange, California, and NPI 1033792882, issued on Apr 29, 2021. Check the license (California PSY32493, 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.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1033792882
Name
Alexander Tan
Credential
PHD
Primary taxonomy
Clinical Neuropsychologist 103G00000X
License number
PSY32493 CA
Self-reported in NPPES; status is on the state search
Practice location
1201 W LA Veta Ave, Orange, CA 92868
Phone
(714) 509-7379
Enumerated
Apr 29, 2021
Record last updated
Oct 31, 2024
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest clinical neuropsychologist records → All 743 in California → Look up another NPI →

Also registered at 1201 W LA Veta Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Sarah AbbamontoClinical Social Worker1396268553
  2. Yesenia Acosta, ACSWClinical Social Worker1114744513
  3. Natalie Adame, PNPPrimary Care Nurse Practitioner1750993622
  4. David Adams, M.D.Neurology with Special Qualifications in Child Neurology Physician1497109722
  5. William Adelman, M.D.Pediatric Adolescent Medicine Physician1831191386
  6. Isela Aguirre Verdugo, LCSWClinical Social Worker1316465834

Verify Alexander Tan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license PSY32493    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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Alexander Tan among 743 clinical neuropsychologist records in California

Alexander Tan, PHD is one of 743 clinical neuropsychologist records with a practice address in California. 23% 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 2021, is newer than 87% of them.

  • NPI issued2021 · 87% of these records are older, 9% newer
  • In a Medicare fileNo · 23% of these records are
  • In the CMS Doctors and Clinicians fileNo · 32% of these records are
  • Record last updated2024 · 61% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103G00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Clinical Neuropsychologist providers in California

There are 743 clinical neuropsychologist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 743 in California → Every provider in Orange → Clinical Neuropsychologist nationwide →

The 8 clinical neuropsychologist records with the nearest ZIP codes

  1. Marcos Di Pinto, PH.D.Orange, CA 928681073760906
  2. Rella KautiainenOrange, CA 928681871269076
  3. Hayley Kristinsson, PSYDOrange, CA 928681023500493
  4. Mina Oak, PHDOrange, CA 928681114051919
  5. Aholibama Ruiz, PHDOrange, CA 928681407745391
  6. Amy Veenstra, PH.D.Orange, CA 928681265809859
  7. Mary Lang, PHD, ABPB, BCBAOrange, CA 928671083881148
  8. Kellie Poynter, M.A.Orange, CA 928661245663285

Common questions

What is Alexander Tan, PHD's NPI number?

Alexander Tan, PHD's National Provider Identifier (NPI) is 1033792882, issued on Apr 29, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Alexander Tan, PHD located?

The NPPES record lists a practice address at 1201 W LA Veta Ave, Orange, CA, 92868. Phone: (714) 509-7379. Providers update this record themselves, so call before visiting.

How can I verify Alexander Tan, PHD's license?

NPPES lists California license number PSY32493, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.