Heather Dawn Onishea
CASAC-T | Addiction (Substance Use Disorder) Counselor
400 Crooked Hill Rd, Brentwood
New York, 11717-1039
631-231-3232 Maps & DirectionsHeather Dawn Onishea is a Brentwood, New York based counselor who is specialized as Addiction (Substance Use Disorder) Counselor. Active license number of Heather Dawn Onishea is 40559 for Addiction (Substance Use Disorder) Counselor in New York. Her current practice location is 400 Crooked Hill Rd, Brentwood. Patients can book an appointment with her at 631-231-3232.
Heather Dawn Onishea 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.
Complete Profile:
Heather Dawn Onishea speciality, credentials, practice address, contact phone number and fax are as below.
Patients can directly walk in or can call on the below given phone number for appointment.
| Name: | Heather Dawn Onishea |
| Specialization: | Addiction (Substance Use Disorder) Counselor |
| Gender: | Female |
| Credentials: | CASAC-T |
| Accepts Medicare Assignment: | No |
| Practice Address: | 400 Crooked Hill Rd, Brentwood,
New York, 11717-1039 |
| Phone: | 631-231-3232 |
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 Number: | 1831038355 |
| NPI Enumeration Date: | 27 Mar, 2026 |
| NPI Last Update On: | 27 Mar, 2026 |
Medical Licenses:
Doctors can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Heather Dawn Onishea are as mentioned below.
| License Number | Specialization | State | Status | |
| 40559 | Addiction (Substance Use Disorder) Counselor | New York | Primary | |
Business Mailing Address:
Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned address.
| Address: | 832 Udall Rd,
West Islip, New York |
| Zip: | 11795-1405 |
| Phone Number: | 631-521-1575 |
Patients can reach Heather Dawn Onishea at
400 Crooked Hill Rd, Brentwood, New York or can
call to book an appointment on 631-231-3232.
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Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 13 July, 2026.