Addiction Therapist

Diane Louise Mercer, CASAC-T

240 Long Island Ave # A, Wyandanch, New York, 11798-3123

About Diane Louise Mercer

Diane Louise Mercer is a therapist based in Wyandanch, New York who is specialized in Addiction (Substance Use Disorder) Counselor. Active license number of Diane Louise Mercer is 18272 for Addiction (Substance Use Disorder) Counselor in New York. Her current practice location is 240 Long Island Ave # A, Wyandanch. Patients can reach her at 631-920-8250 or can fax her at 631-920-8251. Diane Louise Mercer is CASAC-T in Addiction (Substance Use Disorder) Counselor and her NPI number (Unique professional ID assigned by NPPES) is 1598985301.

Diane Louise Mercer is a licensed mental health therapist who help individuals struggling with addiction of alcohol, drug, or other substance use disorder. She helps her 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

Diane Louise Mercer 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 Diane Louise Mercer
Specialization Addiction (Substance Use Disorder) Counselor
Credentials CASAC-T
Gender Female
Practice Address: 240 Long Island Ave # A,
Wyandanch, NY - 11798-3123
Fax 631-920-8251

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 Number1598985301
NPI Enumeration Date: 26 Apr, 2007
NPI Last Update On: 08 Jul, 2007

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 Diane Louise Mercer are as mentioned below.

License NumberSpecializationStateStatus
18272Addiction (Substance Use Disorder) Counselor New YorkPrimary

Mailing Address

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

Diane Louise Mercer
34 King St,
Wyandanch, NY - 11798-4412
Phone: 631-920-8250
Fax: 631-920-8251

Book an Appointment with Diane Louise Mercer

To schedule an appointment, contact Diane Louise Mercer at 240 Long Island Ave # A, Wyandanch, New York or call on below stated phone number.

Call to Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Diane Louise Mercer:

Diane Louise Mercer is a therapist specializing in Addiction (Substance Use Disorder) Counselor. She is a licensed mental health therapist who help individuals struggling with addiction of alcohol, drug, or other substance use disorder. She helps her 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, Diane Louise Mercer is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.

Diane Louise Mercer practices at 240 Long Island Ave # A, Wyandanch, New York, 11798-3123.

To schedule an appointment with Diane Louise Mercer, please contact the office at 631-920-8250.

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