MR. MATTHEW DAVID ARNOLD PSYD
NPI 1083378491
Psychologist in Atascadero, CA

Active since October 22, 2021
11708 SINNARD LN, ATASCADERO, CA 93422(360) 907-6872 Get Directions Write a Review

NPPES record last updated: December 5, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Dec 5, 2025, Apr 16, 2023, Oct 22, 2021 (3 updates tracked since 2021).

About Mr. Matthew David Arnold Psyd NPPES

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

MR. MATTHEW DAVID ARNOLD PSYD (NPI 1083378491) is an individual psychologist in Atascadero, California, licensed in California (PSY35896) and active in the NPI registry since October 2021. He maintains 2 additional practice locations.

NPPES Registry Identity

NPI1083378491
Entity TypeIndividualMale
Primary Taxonomy103T00000X
Provider Legal NameMR. MATTHEW DAVID ARNOLDCredential: PSYD
Location Address11708 SINNARD LNAtascadero, CA 93422-6018
Mailing Address11708 Sinnard LnAtascadero, CA 93422-6018
Sole ProprietorNo
Enumeration DateOctober 22, 2021
Last NPPES UpdateDecember 5, 20253 updates tracked since enumeration
NPPES CertifiedDecember 5, 2025
NPI 1083378491 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License Licensed in CA · PSY35896
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
11708 SINNARD LN, Atascadero, CA 93422

Secondary Practice Locations 2

Location 110333 El Camino RealAtascadero, CA 93422-5808 · Phone (805) 462-2882
Location 2650 Joel DrFort Campbell, KY 42223-5318 · Phone (360) 907-6872

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Matthew Arnold's NPI number?

The NPI number for Matthew Arnold is 1083378491. It was assigned to this individual provider in the NPPES registry on October 22, 2021.

Where is Matthew Arnold located?

Matthew Arnold practices at 11708 Sinnard Ln, Atascadero, CA 93422. The listed phone number is (360) 907-6872.

What is Matthew Arnold's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

When was this NPI record last updated?

The NPPES record for Matthew Arnold was last updated on December 5, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.