Addiction Therapist

Justin Larkin

3286 E Guasti Rd Ste 100, Ontario, California, 91761-8646

About Justin Larkin

Justin Larkin is a therapist based in Ontario, California who is specialized in Addiction (Substance Use Disorder) Counselor. His current practice location is 3286 E Guasti Rd Ste 100, Ontario. Patients can reach him at 909-476-2023. Justin Larkin NPI number (Unique professional ID assigned by NPPES) is 1326974239.

Justin Larkin is a licensed mental health therapist who help individuals struggling with addiction of alcohol, drug, or other substance use disorder. He helps his clients by manage and overcome the psychological, emotional, and behavioral challenges related to substance use. Counselors also work closely with families and support systems to help them better understand their loved one’s illness. SUD counselors help to promote long-term sobriety, emotional stability, and overall mental wellness for both the individual and their family.

Practice Information

Justin Larkin speciality, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Justin Larkin
Specialization Addiction (Substance Use Disorder) Counselor
Gender Male
Practice Address: 3286 E Guasti Rd Ste 100,
Ontario, CA - 91761-8646

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

NPI Number1326974239
NPI Enumeration Date: 18 Jun, 2026
NPI Last Update On: 18 Jun, 2026

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Justin Larkin are as mentioned below.

License NumberSpecializationStateStatus
Addiction (Substance Use Disorder) Counselor CaliforniaPrimary

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Justin Larkin
3286 E Guasti Rd Ste 100,
Ontario, CA - 91761-8646
Phone: 909-476-2023

Book an Appointment with Justin Larkin

To schedule an appointment, contact Justin Larkin at 3286 E Guasti Rd Ste 100, Ontario, California or call on below stated phone number.

Call to Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Justin Larkin:

Justin Larkin is a therapist specializing in Addiction (Substance Use Disorder) Counselor. He is a licensed mental health therapist who help individuals struggling with addiction of alcohol, drug, or other substance use disorder. He helps his clients by manage and overcome the psychological, emotional, and behavioral challenges related to substance use. Counselors also work closely with families and support systems to help them better understand their loved one’s illness. SUD counselors help to promote long-term sobriety, emotional stability, and overall mental wellness for both the individual and their family.

Yes, Justin Larkin is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.

Justin Larkin practices at 3286 E Guasti Rd Ste 100, Ontario, California, 91761-8646.

To schedule an appointment with Justin Larkin, please contact the office at 909-476-2023.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.