Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MR. RYAN O CHADDERTON PSYD.
NPI 1609998335
Marriage & Family Therapist in Garden Grove, CA

Q: What is Ryan Chadderton's NPI number?

The NPI number for Ryan Chadderton is 1609998335. It was assigned to this individual provider in the NPPES registry on April 4, 2007.

Q: What is Ryan Chadderton's specialty?

The primary specialty registered for this NPI is Marriage & Family Therapist with taxonomy code 106H00000X.

Q: When was this NPI record last updated?

The NPPES record for Ryan Chadderton was last updated on July 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since April 04, 2007

10331 STANFORD AVE, GARDEN GROVE, CA 92840(714) 663-6391 Get Directions Write a Review

NPPES record last updated: July 30, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 30, 2026, Nov 20, 2025 (2 updates tracked since 2025).

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About Mr. Ryan O Chadderton Psyd. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. RYAN O CHADDERTON PSYD. (NPI 1609998335) is an individual marriage & family therapist in Garden Grove, California, licensed in California (164428) and active in the NPI registry since April 2007.

NPPES Registry Identity

NPI1609998335

Entity TypeIndividualMale

Primary Taxonomy106H00000X

Provider Legal NameMR. RYAN O CHADDERTONCredential: PSYD.

Location Address10331 STANFORD AVEGarden Grove, CA 92840-6351

Mailing Address10331 Stanford AveGarden Grove, CA 92840-6351 · (714) 663-6391

Phone(714) 663-6391

Sole ProprietorNo

Enumeration DateApril 4, 2007

Last NPPES UpdateJuly 30, 20262 updates tracked since enumeration

NPPES CertifiedJuly 30, 2026

✔ NPI 1609998335 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyMarriage & Family TherapistBehavioral Health & Social Service Providers

Taxonomy Code106H00000X

License✔ Licensed in CA · 164428

Definition

A marriage and family therapist is a person with a master's degree in marriage and family therapy, or a master's or doctoral degree in a related mental health field with substantially equivalent coursework in marriage and family therapy, who receives supervised clinical experience, or a person who meets the state requirements to practice as a marriage and family therapist. A marriage and family therapist treats mental and emotional disorders within the context of marriage and family systems. A marriage and family therapist provides mental health and counseling services to individuals, couples, families, and groups.

Also ListedPsychologistTaxonomy 103T00000X

Also ListedRehabilitation PractitionerTaxonomy 225400000X

10331 STANFORD AVE, Garden Grove, CA 92840

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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

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