Addiction Therapist

Gregg Mazzariello, CCAPP COUNSELOR

603 D St, San Rafael, California, 94901-3719

About Gregg Mazzariello

Gregg Mazzariello is a therapist based in San Rafael, California who is specialized in Addiction (Substance Use Disorder) Counselor. Active license number of Gregg Mazzariello is R1289570218 for Addiction (Substance Use Disorder) Counselor in California. His current practice location is 603 D St, San Rafael. Patients can reach him at 415-454-9444. Gregg Mazzariello is CCAPP COUNSELOR in Addiction (Substance Use Disorder) Counselor and his NPI number (Unique professional ID assigned by NPPES) is 1316440175.

Gregg Mazzariello 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

Gregg Mazzariello 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 Gregg Mazzariello
Specialization Addiction (Substance Use Disorder) Counselor
Credentials CCAPP COUNSELOR
Gender Male
Practice Address: 603 D St,
San Rafael, CA - 94901-3719

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 Number1316440175
NPI Enumeration Date: 16 Mar, 2018
NPI Last Update On: 16 Mar, 2018

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 Gregg Mazzariello are as mentioned below.

License NumberSpecializationStateStatus
R1289570218Addiction (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.

Gregg Mazzariello
603 D St,
San Rafael, CA - 94901-3719
Phone: 415-454-9444

Book an Appointment with Gregg Mazzariello

To schedule an appointment, contact Gregg Mazzariello at 603 D St, San Rafael, California or call on below stated phone number.

Call to Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Gregg Mazzariello:

Gregg Mazzariello 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, Gregg Mazzariello is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.

Gregg Mazzariello practices at 603 D St, San Rafael, California, 94901-3719.

To schedule an appointment with Gregg Mazzariello, please contact the office at 415-454-9444.

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