Addiction Therapist

Leonard John Preuss

1400 N Johnson Ave, Ste 101, El Cajon, California, 92020-1650

About Leonard John Preuss

Leonard John Preuss is a therapist based in El Cajon, California who is specialized in Addiction (Substance Use Disorder) Counselor. His current practice location is 1400 N Johnson Ave, Ste 101, El Cajon. Patients can reach him at 619-442-0277. Leonard John Preuss NPI number (Unique professional ID assigned by NPPES) is 1700172541.

Leonard John Preuss 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

Leonard John Preuss 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 Leonard John Preuss
Specialization Addiction (Substance Use Disorder) Counselor
Gender Male
Practice Address: 1400 N Johnson Ave, Ste 101
El Cajon, CA - 92020-1650

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 Number1700172541
NPI Enumeration Date: 20 Jun, 2011
NPI Last Update On: 20 Jun, 2011

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 Leonard John Preuss are as mentioned below.

License NumberSpecializationStateStatus
Addiction (Substance Use Disorder) Counselor Primary

Mailing Address

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

Leonard John Preuss
1400 N Johnson Ave, Ste 101
El Cajon, CA - 92020-1650
Phone: 619-442-0277

Book an Appointment with Leonard John Preuss

To schedule an appointment, contact Leonard John Preuss at 1400 N Johnson Ave, Ste 101, El Cajon, California or call on below stated phone number.

Call to Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Leonard John Preuss:

Leonard John Preuss 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, Leonard John Preuss is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.

Leonard John Preuss practices at 1400 N Johnson Ave, Ste 101, El Cajon, California, 92020-1650.

To schedule an appointment with Leonard John Preuss, please contact the office at 619-442-0277.

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