NPPES file of Aug 9, 2026

Ryan O. Chadderton, PSYD.

Marriage & Family Therapist · Garden Grove, CA

Ryan O. Chadderton, PSYD. is a marriage & family therapist with a practice address in Garden Grove, California, and NPI 1609998335, issued on Apr 4, 2007. Check the license (California 164428, 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
1609998335
Name
Ryan O. Chadderton
Credential
PSYD.
Primary taxonomy
Marriage & Family Therapist 106H00000X
License number
164428 CA
Self-reported in NPPES; status is on the state search
Practice location
10331 Stanford Ave, Garden Grove, CA 92840
Phone
(714) 663-6391
Enumerated
Apr 4, 2007
Record last updated
Jul 30, 2026
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 marriage & family therapist records → All 59,889 in California → Look up another NPI →

Also registered at 10331 Stanford Ave

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

  1. Jesus AdanClinical Social Worker1780553784
  2. Griselda Alvarado, MSW, LCSWClinical Social Worker1568861722
  3. Roxana Avila, LCSWClinical Social Worker1982413761
  4. Vanessa Avila, MSWClinical Social Worker1538562806
  5. Alyssa Bacon-LiuClinical Social Worker1881473494
  6. Fernando Barba Jr, LCSWClinical Social Worker1184122673

Verify Ryan O. Chadderton 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 164428    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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Ryan O. Chadderton among 59,889 marriage & family therapist records in California

Ryan O. Chadderton, PSYD. is one of 59,889 marriage & family therapist records with a practice address in California. 4% 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 7% of them.

  • NPI issued2007 · 7% of these records are older, 77% newer
  • In a Medicare fileNo · 4% of these records are
  • In the CMS Doctors and Clinicians fileNo · 8% of these records are
  • Record last updated2026 · 50% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 106H00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

104 marriage & family therapist records list a practice address in Garden Grove

They are 104 of the 4,572 NPPES records with a practice address in Garden Grove, and 59,889 marriage & family therapist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 59,889 in California → Every provider in Garden Grove → Marriage & Family Therapist nationwide →

The 8 marriage & family therapist records with the nearest ZIP codes

  1. Alison Gracia, M.A.,LMFTGarden Grove, CA 928401275830275
  2. Grace HutchinsonGarden Grove, CA 928401295961381
  3. Heather King, MFTGarden Grove, CA 928401366604118
  4. Bao Gia LeGarden Grove, CA 928401215290622
  5. Patricia PhillipsGarden Grove, CA 928401285750703
  6. Jane RiehlGarden Grove, CA 928401396057246
  7. Milfred Salwasser, LMFTGarden Grove, CA 928401861795593
  8. Corene Tague, M.A.Garden Grove, CA 928401003011701

Common questions

What is Ryan O. Chadderton, PSYD.'s NPI number?

Ryan O. Chadderton, PSYD.'s National Provider Identifier (NPI) is 1609998335, issued on Apr 4, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Ryan O. Chadderton, PSYD. located?

The NPPES record lists a practice address at 10331 Stanford Ave, Garden Grove, CA, 92840. Phone: (714) 663-6391. Providers update this record themselves, so call before visiting.

How can I verify Ryan O. Chadderton, PSYD.'s license?

NPPES lists California license number 164428, 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.