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MARVIN DARNELL GRADDY
NPI 1144805011
Psychologist - Addiction (Substance Use Disorder) in Antioch, CA

Active since March 12, 2021
1320 ROCKSPRING WAY, ANTIOCH, CA 94531(925) 334-9906 Get Directions Write a Review

NPPES record last updated: March 12, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Marvin Darnell Graddy NPPES

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

MARVIN DARNELL GRADDY (NPI 1144805011) is an individual addiction (substance use disorder) provider in Antioch, California, licensed in California (101YA0400X) and active in the NPI registry since March 2021.

NPPES Registry Identity

NPI1144805011
Entity TypeIndividualMale
Primary Taxonomy103TA0400X
Provider Legal NameMARVIN DARNELL GRADDY
Location Address1320 ROCKSPRING WAYAntioch, CA 94531-8397
Mailing Address3707 Sunset LnAntioch, CA 94509-6101 · (925) 522-0124
Phone(925) 334-9906
Sole ProprietorYes
Enumeration DateMarch 12, 2021
NPPES CertifiedMarch 12, 2021
✔ NPI 1144805011 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPsychologist · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code103TA0400X
License✔ Licensed in CA · 101YA0400X
Definition
A psychologist with a proficiency that involves the application of psychological treatment of addiction stemming from the use of alcohol and other psychoactive substances (e.g., nicotine, marijuana, cocaine, heroin) or behavioral addictions (e.g., gambling) with the aim of cessation or reduction of use and/or the amelioration of emotional, behavioral, interpersonal and other problems arising from the addictive behavior.
Also ListedCounselor · Addiction (Substance Use Disorder)Taxonomy 101YA0400X · License 101YA0400X (CA)
Also ListedCounselor · Mental HealthTaxonomy 101YM0800X · License 101YA0400X (CA)
1320 ROCKSPRING WAY, Antioch, CA 94531
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Other Identifiers 1

Medicaid5VE8-FC6-UP53CA

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 Marvin Graddy's NPI number?

The NPI number for Marvin Graddy is 1144805011. It was assigned to this individual provider in the NPPES registry on March 12, 2021.

Where is Marvin Graddy located?

Marvin Graddy practices at 1320 Rockspring Way, Antioch, CA 94531. The listed phone number is (925) 334-9906.

What is Marvin Graddy's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Addiction (Substance Use Disorder), with taxonomy code 103TA0400X.

When was this NPI record last updated?

The NPPES record for Marvin Graddy was last updated on March 12, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.