NPPES file of Aug 9, 2026

Marie De La Paz Sum, PSY.D.

Clinical Child & Adolescent Psychologist · Pleasanton, CA

Marie De La Paz Sum, PSY.D. is a clinical child & adolescent psychologist with a practice address in Pleasanton, California, and NPI 1396804399, issued on Dec 6, 2006. Check the license (California PSY20000, 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
1396804399
Name
Marie De La Paz Sum
Credential
PSY.D.
Primary taxonomy
Clinical Child & Adolescent Psychologist 103TC2200X
License number
PSY20000 CA
Self-reported in NPPES; status is on the state search
Practice location
3825 Hopyard RD, Pleasanton, CA 94588
Phone
(925) 847-5102
Enumerated
Dec 6, 2006
Record last updated
Jan 14, 2022
Fax
(925) 847-5593
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 child & adolescent psychologist records → All 670 in California → Look up another NPI →

Also registered at 3825 Hopyard RD

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

  1. Laurie Chen, M.D.Psychiatry Physician1861689820
  2. Allison Delorefice, PHDClinical Psychologist1306226832
  3. Spencer Gross, PH.D.Clinical Psychologist1447300835
  4. Rebecca Hirsch, MDPsychiatry Physician1033295563
  5. Janet Merz, LCSWClinical Social Worker1851467302
  6. Mary O'Neill, LCSWClinical Social Worker1417217878

Verify Marie De La Paz Sum 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 PSY20000    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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Marie De La Paz Sum among 670 clinical child & adolescent psychologist records in California

Marie De La Paz Sum, PSY.D. is one of 670 clinical child & adolescent psychologist records with a practice address in California. 3% 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 under 1% of them.

  • NPI issued2006 · under 1% of these records are older, 86% newer
  • In a Medicare fileNo · 3% of these records are
  • In the CMS Doctors and Clinicians fileNo · 6% of these records are
  • Record last updated2022 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC2200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Clinical Child & Adolescent Psychologist providers in California

There are 670 clinical child & adolescent psychologist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 670 in California → Every provider in Pleasanton → Clinical Child & Adolescent Psychologist nationwide →

The 8 clinical child & adolescent psychologist records with the nearest ZIP codes

  1. Katherine Nagy-Nitz, PSYDPleasanton, CA 945881922544139
  2. Dale Siperstein, PHDPleasanton, CA 945881851641765
  3. Theresa Volpe Johnstone, PHDPleasanton, CA 945881588916191
  4. Elizabeth Caetano, PHDVallejo, CA 945891851451173
  5. Teresa Flores Backstrom, PSY.D.Union City, CA 945871538222732
  6. George Mutch, PSYCHOLOGISTUnion City, CA 945871609941616
  7. Magaly Solis, PH.D.Union City, CA 945871174660658
  8. James Murakami, PH.D.Vallejo, CA 945901407910482

Common questions

What is Marie De La Paz Sum, PSY.D.'s NPI number?

Marie De La Paz Sum, PSY.D.'s National Provider Identifier (NPI) is 1396804399, issued on Dec 6, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Marie De La Paz Sum, PSY.D. located?

The NPPES record lists a practice address at 3825 Hopyard RD, Pleasanton, CA, 94588. Phone: (925) 847-5102. Providers update this record themselves, so call before visiting.

How can I verify Marie De La Paz Sum, PSY.D.'s license?

NPPES lists California license number PSY20000, 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.