Addiction Therapist

William Clark, LPC, LCADC

209 Cooper Avenue, Suite 2, Upper Montclair, New Jersey, 07043-1850

About William Clark

William Clark is a therapist based in Upper Montclair, New Jersey who is specialized in Addiction (Substance Use Disorder) Counselor. Active license number of William Clark is 37PC00492700 for Professional Counselor in New Jersey. His current practice location is 209 Cooper Avenue, Suite 2, Upper Montclair. Patients can reach him at 973-220-9864 or can fax him at 973-807-9363. William Clark is LPC, LCADC in Addiction (Substance Use Disorder) Counselor and his NPI number (Unique professional ID assigned by NPPES) is 1932528312.

William Clark 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

William Clark 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 William Clark
Specialization Addiction (Substance Use Disorder) Counselor
Credentials LPC, LCADC
Gender Male
Practice Address: 209 Cooper Avenue, Suite 2
Upper Montclair, NJ - 07043-1850
Fax 973-807-9363

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 Number1932528312
NPI Enumeration Date: 14 Apr, 2014
NPI Last Update On: 18 Aug, 2016

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 William Clark are as mentioned below.

License NumberSpecializationStateStatus
37PC00492700Professional Counselor New JerseyPrimary
37LC00186000Addiction (Substance Use Disorder) Counselor New JerseySecondary

Mailing Address

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

William Clark
209 Cooper Avenue, Suite 2
Upper Montclair, NJ - 07043-1850
Phone: 973-220-9864
Fax: 973-807-9363

Book an Appointment with William Clark

To schedule an appointment, contact William Clark at 209 Cooper Avenue, Suite 2, Upper Montclair, New Jersey or call on below stated phone number.

Call to Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about William Clark:

William Clark is a therapist specializing in Professional Counselor. He is a licensed mental health practitioner trained to help individuals, couples, and groups address emotional, psychological, and behavioral challenges. He uses talk therapy and evidence-based counseling methods to support clients in managing mental health conditions, improving relationships, and developing coping strategies for life’s difficulties.

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

William Clark practices at 209 Cooper Avenue, Suite 2, Upper Montclair, New Jersey, 07043-1850.

To schedule an appointment with William Clark, please contact the office at 973-220-9864.

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