Justin Larkin

Addiction (Substance Use Disorder) Counselor


  3286 E Guasti Rd Ste 100, Ontario
     California, 91761-8646
  909-476-2023    Maps & Directions
Justin Larkin is a Ontario, California based counselor who is specialized as Addiction (Substance Use Disorder) Counselor. His current practice location is 3286 E Guasti Rd Ste 100, Ontario. Patients can book an appointment with him at 909-476-2023.
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.
Complete Profile:
Justin Larkin speciality, credentials, practice address, contact phone number and fax are as below. Patients can directly walk in or can call on the below given phone number for appointment.
Name: Justin Larkin
Specialization: Addiction (Substance Use Disorder) Counselor
Gender:Male
Accepts Medicare Assignment:No
Practice Address:3286 E Guasti Rd Ste 100, Ontario,
California, 91761-8646
Phone:909-476-2023
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 Number: 1326974239
NPI Enumeration Date: 18 Jun, 2026
NPI Last Update On: 18 Jun, 2026

Business Mailing Address:
Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned address.
Address: 3286 E Guasti Rd Ste 100,
Ontario, California
Zip: 91761-8646
Phone Number: 909-476-2023
Patients can reach Justin Larkin at 3286 E Guasti Rd Ste 100, Ontario, California or can call to book an appointment on 909-476-2023.
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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 13 July, 2026.