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JUSTIN LARKIN
NPI 1326974239
Counselor - Addiction (Substance Use Disorder) in Ontario, CA

Active since June 18, 2026
3286 E GUASTI RD STE 100, ONTARIO, CA 91761(909) 476-2023 Get Directions Write a Review

NPPES record last updated: June 18, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Justin Larkin NPPES

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

JUSTIN LARKIN (NPI 1326974239) is an individual addiction (substance use disorder) provider in Ontario, California and active in the NPI registry since June 2026.

NPPES Registry Identity

NPI1326974239
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameJUSTIN LARKIN
Location Address3286 E GUASTI RD STE 100Ontario, CA 91761-8646
Mailing Address3286 E Guasti Rd Ste 100Ontario, CA 91761-8646 · (909) 476-2023
Phone(909) 476-2023
Sole ProprietorNo
Enumeration DateJune 18, 2026
NPPES CertifiedJune 18, 2026
✔ NPI 1326974239 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
3286 E GUASTI RD STE 100, Ontario, CA 91761
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Other Providers at the Same Location NPPES 14

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

HECTOR MANUEL MARTINEZ JR.
Counselor (Addiction (Substance Use Disorder))
3286 E GUASTI RD STE 100
ONTARIO, CA 91761
San Bernardino County (909) 906-9844
NICOLETTE CALDERON
Counselor (Addiction (Substance Use Disorder))
3286 E GUASTI RD STE 100
ONTARIO, CA 91761
San Bernardino County (909) 476-2023
JOSHUA JAMES NIPP
Counselor (Addiction (Substance Use Disorder))
3286 E GUASTI RD STE 100
ONTARIO, CA 91761
San Bernardino County (909) 906-9844
JOSEPH WEBB
Counselor (Addiction (Substance Use Disorder))
3286 E GUASTI RD STE 100
ONTARIO, CA 91761
San Bernardino County (909) 476-2023
JERMAINE W WOODARD
Counselor (Addiction (Substance Use Disorder))
3286 E GUASTI RD STE 100
ONTARIO, CA 91761
San Bernardino County (909) 906-9844
LISA ROLLF
Specialist
3286 E GUASTI RD STE 100
ONTARIO, CA 91761
San Bernardino County (909) 479-3836
FAREED AHMED
Counselor (Addiction (Substance Use Disorder))
3286 E GUASTI RD STE 100
ONTARIO, CA 91761
San Bernardino County (909) 906-9844
VALENTIN REYES JR.
Counselor (Addiction (Substance Use Disorder))
3286 E GUASTI RD STE 100
ONTARIO, CA 91761
San Bernardino County (909) 515-4157

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 Justin Larkin's NPI number?

The NPI number for Justin Larkin is 1326974239. It was assigned to this individual provider in the NPPES registry on June 18, 2026.

Where is Justin Larkin located?

Justin Larkin practices at 3286 E Guasti Rd Ste 100, Ontario, CA 91761. The listed phone number is (909) 476-2023.

What is Justin Larkin's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

When was this NPI record last updated?

The NPPES record for Justin Larkin was last updated on June 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 47 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.