Addiction Therapist

Ms. Theresa O'neill, LCSW

950 S Oyster Bay Rd, Hicksville, New York, 11801-3510

About Ms. Theresa O'neill

Ms. Theresa O'neill is a therapist based in Hicksville, New York who is specialized in Addiction (Substance Use Disorder) Counselor. Her current practice location is 950 S Oyster Bay Rd, Hicksville. Patients can reach her at 516-822-4060. Ms. Theresa O'neill is LCSW in Addiction (Substance Use Disorder) Counselor and her NPI number (Unique professional ID assigned by NPPES) is 1467625947.

Ms. Theresa O'neill 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

Ms. Theresa O'neill 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 Ms. Theresa O'neill
Specialization Addiction (Substance Use Disorder) Counselor
Credentials LCSW
Gender Female
Practice Address: 950 S Oyster Bay Rd,
Hicksville, NY - 11801-3510

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 Number1467625947
NPI Enumeration Date: 07 Apr, 2008
NPI Last Update On: 22 Oct, 2013

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 Ms. Theresa O'neill 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.

Ms. Theresa O'neill
950 S Oyster Bay Rd,
Hicksville, NY - 11801-3510
Phone: 516-822-4060
Fax: 516-396-0559

Book an Appointment with Ms. Theresa O'neill

To schedule an appointment, contact Ms. Theresa O'neill at 950 S Oyster Bay Rd, Hicksville, New York or call on below stated phone number.

Call to Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Ms. Theresa O'neill:

Ms. Theresa O'neill 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, Ms. Theresa O'neill is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.

Ms. Theresa O'neill practices at 950 S Oyster Bay Rd, Hicksville, New York, 11801-3510.

To schedule an appointment with Ms. Theresa O'neill, please contact the office at 516-822-4060.

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