NPPES file of Aug 9, 2026

Tricia Lynn Duncan-Hassel, PSY.D.

Clinical Psychologist · Glendora, CA

Tricia Lynn Duncan-Hassel, PSY.D. is a clinical psychologist with a practice address in Glendora, California, and NPI 1104993898, issued on Nov 29, 2006. Check the license (California PSY19604, 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
1104993898
Name
Tricia Lynn Duncan-Hassel
Credential
PSY.D.
Primary taxonomy
Clinical Psychologist 103TC0700X
License number
PSY19604 CA
Self-reported in NPPES; status is on the state search
Practice location
410 S Glendora Ave, Glendora, CA 91741
Phone
(626) 600-8601
Enumerated
Nov 29, 2006
Record last updated
Dec 11, 2017 (not updated in 9 years: call before relying on the address or phone)
Fax
(626) 852-5757
Medicare enrollment
Enrolled (PECOS I20041005000760); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest clinical psychologist records → All 12,647 in California → Look up another NPI →

Also registered at 410 S Glendora Ave

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

  1. Joseph Anthony, DDS,MSSpecialist1447361753
  2. Daryl Munson, D.D.S.General Practice Dentistry1710995873
  3. Francis Senise, D.D.S.General Practice Dentistry1801012885

Verify Tricia Lynn Duncan-Hassel 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 PSY19604    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Tricia Lynn Duncan-Hassel among 12,647 clinical psychologist records in California

Tricia Lynn Duncan-Hassel, PSY.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 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 fileYes · 19% of these records are
  • Graduated2002 · median 2006 among the 2,424 with a school on file
  • Record last updated2017 · 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).

28 clinical psychologist records list a practice address in Glendora

They are 28 of the 921 NPPES records with a practice address in Glendora, 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 Glendora → Clinical Psychologist nationwide →

The 8 clinical psychologist records with the nearest ZIP codes

  1. Jessica Cendejas, PSY.D.Glendora, CA 917411215261508
  2. James De Santis, PH.D.Glendora, CA 917411558385880
  3. Sara DennisGlendora, CA 917411790980506
  4. Angela Donahue, PH.D.Glendora, CA 917411437170560
  5. Richard Foss, PH.D.Glendora, CA 917411437378536
  6. David Hickel, PH.D.Glendora, CA 917411629109079
  7. Lisa IrwinGlendora, CA 917411659622991
  8. Thomas Malcolm, PH.D.Glendora, CA 917411528083953

Common questions

What is Tricia Lynn Duncan-Hassel, PSY.D.'s NPI number?

Tricia Lynn Duncan-Hassel, PSY.D.'s National Provider Identifier (NPI) is 1104993898, issued on Nov 29, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Tricia Lynn Duncan-Hassel, PSY.D. located?

The NPPES record lists a practice address at 410 S Glendora Ave, Glendora, CA, 91741. Phone: (626) 600-8601. Providers update this record themselves, so call before visiting.

How can I verify Tricia Lynn Duncan-Hassel, PSY.D.'s license?

NPPES lists California license number PSY19604, 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.