NPPES file of Aug 9, 2026

Oscar A. Donoso, PHD, LP

Clinical Psychologist · Orange, CA

Oscar A. Donoso, PHD, LP is a clinical psychologist with a practice address in Orange, California, and NPI 1801025879, issued on Jul 10, 2009. Check the license (California 24553, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1801025879
Name
Oscar A. Donoso
Credential
PHD, LP
Primary taxonomy
Clinical Psychologist 103TC0700X
License number
24553 CA
Self-reported in NPPES; status is on the state search
Practice location
701 S Parker St Ste 2800, Orange, CA 92868
Phone
(925) 282-1778
Enumerated
Jul 10, 2009
Record last updated
Jul 14, 2025
Medicare enrollment
Enrolled (PECOS I20241118002980); 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.
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8 nearest clinical psychologist records → All 12,647 in California → Look up another NPI →

Also registered at 701 S Parker St Ste 2800

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

  1. Brittany Ahern Nwachie, LCSWClinical Social Worker1871179416
  2. Corina Cervantes, LMFTMarriage & Family Therapist1730494956
  3. Brianna Evans, MSW, LCSWClinical Social Worker1861084097
  4. Vanessa Flores, LCSWClinical Social Worker1053937037
  5. Lisa Johnson, NP, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1447553664
  6. Jungwon Kim, LMFTMarriage & Family Therapist1649609447

Verify Oscar A. Donoso 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 24553    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.

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Bills Medicare through one group practice

  1. Pacific Coast Psychiatric Associates IncOrange, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Oscar A. Donoso among 12,647 clinical psychologist records in California

Oscar A. Donoso, PHD, LP 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. Its NPI, issued in 2009, is newer than 49% of them.

  • NPI issued2009 · 49% of these records are older, 46% newer
  • In a Medicare fileYes · 9% of these records are
  • In the CMS Doctors and Clinicians fileYes · 19% of these records are
  • Graduated2010 · median 2006 among the 2,424 with a school on file
  • Record last updated2025 · 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).

Clinical Psychologist providers in California

There are 12,647 clinical psychologist records in California.

All 12,647 in California → Every provider in Orange → Clinical Psychologist nationwide →

The 8 clinical psychologist records with the nearest ZIP codes

  1. Luis Arevalo, PH.D.Orange, CA 928681578513073
  2. Azin Asli, PH.D.Orange, CA 928681013005842
  3. Martin Bick, PH.D.Orange, CA 928681891883393
  4. Candace Cartmill-Nishimoto, PH.D.Orange, CA 928681821186537
  5. Janet Fossum, PH.D.Orange, CA 928681871673954
  6. Keith Howard, PH.D.Orange, CA 928681558373506
  7. Azahar Lopez Escamilla, PSY.D.Orange, CA 928681104906064
  8. Gregory Manning, PSY.D.Orange, CA 928681700973047

Common questions

What is Oscar A. Donoso, PHD, LP's NPI number?

Oscar A. Donoso, PHD, LP's National Provider Identifier (NPI) is 1801025879, issued on Jul 10, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Oscar A. Donoso, PHD, LP located?

The NPPES record lists a practice address at 701 S Parker St Ste 2800, Orange, CA, 92868. Phone: (925) 282-1778. Providers update this record themselves, so call before visiting.

How can I verify Oscar A. Donoso, PHD, LP's license?

NPPES lists California license number 24553, 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. Medicare files from data.cms.gov. 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.