Alcohol & Drug Rehabs in Riverhead, New York

Every rehab center in the Riverhead directory is a licensed or accredited provider, and listings are organized to help you compare real options rather than to promote one facility over another. We prioritize programs certified by the New York State Office of Addiction Services and Supports (OASAS) and independently accredited by the Joint Commission or CARF, and we label any sponsored placement clearly so you always know what you are looking at.

Listing details reflect the levels of care, specialty tracks, and payment types each facility reports, drawn from public licensing records and facility information. Because openings and insurance participation change, confirm current availability and program specifics directly with a center when you reach out. The aim is to give you an accurate starting point for finding care close to home.

Riverhead is the seat of eastern Suffolk County on Long Island, where the North and South Forks meet, with a solid base of addiction treatment. The area has 10 rehab centers offering detox, inpatient, and outpatient care, and you can compare every nearby option through the New York rehab directory.

Seafield Center, an OASAS-licensed and Joint Commission-accredited provider, anchors eastern Long Island care with an outpatient clinic in Riverhead, inpatient and detox services in nearby Westhampton Beach, and recovery homes across Suffolk County. Suffolk County community mental hygiene services coordinate treatment access, crisis support, and naloxone. New York Medicaid coverage is delivered through Medicaid managed care and Health and Recovery Plans (HARPs).

Suffolk County has been among the hardest hit on Long Island by the fentanyl crisis, with roughly 400 opioid overdose deaths in 2023. Statewide, overdose deaths fell about 32% in 2024, and fast access to naloxone and treatment remains a local priority.

Crisis support: Call or text 988, or reach New York’s HOPEline at 1-877-846-7369 (text HOPENY to 467369) for 24/7 help.

New York Medicaid: SUD care is covered through Medicaid managed care and Health and Recovery Plans (HARPs).

Detox and inpatient: Seafield Center provides detox and residential care in nearby Westhampton Beach.

Free naloxone: Available at NY pharmacies without a prescription and through Suffolk County programs.

The cost of rehab in Riverhead depends on the level of care, program length, and whether you use insurance. New York sits near the national midpoint for treatment affordability, with a statewide residential average of roughly $56,653 without insurance, though most people pay a fraction of that once insurance benefits are applied. The figures below reflect New York averages by care type.

Actual costs vary with setting, amenities, and length of stay. Outpatient programs cost far less than residential care and are the most common local format, while medical detox and inpatient stays carry the highest price tags. Because Riverhead sits in the higher-cost Long Island region, private programs can price above the state average, though New York Medicaid and OASAS-funded programs anchor affordability.

Treatment setting: inpatient and residential care cost more than outpatient.

Program length: 30, 60, and 90-day programs scale in price.

Level of care: medical detox and 24-hour supervision raise costs.

Insurance status: in-network coverage and Medicaid reduce out-of-pocket cost.

Region: Long Island private-pay rates run higher than upstate.

Across the 10 rehab centers serving Riverhead, most accept self-payment, private insurance, and New York Medicaid, and many work with Medicare and financial assistance. The counts below show how many local facilities report accepting each payment type.

9 accept self-payment or cash

8 accept private health insurance

7 accept New York Medicaid

5 offer financial assistance

4 accept Medicare

3 offer sliding-scale fees

1 accepts TRICARE

Which option makes the most sense depends on your coverage and income. The subsections below outline how the main payment paths work for Riverhead residents.

New York Medicaid

New York Medicaid covers the full continuum of substance use care, from detox to outpatient counseling and medication for addiction treatment, including all three FDA-approved opioid use disorder medications. Benefits are delivered through Medicaid managed care plans and Health and Recovery Plans (HARPs). Seven Riverhead facilities report accepting New York Medicaid, and Seafield Center is a strong OASAS-licensed starting point.

Medicare

Medicare covers substance use treatment that is medically necessary, including inpatient care under Part A and outpatient services and counseling under Part B, with Medicare Advantage plans offering the same benefits. Four Riverhead area centers accept Medicare.

Insurance and Private Pay

Most Riverhead centers accept private insurance or self-payment, and New York parity laws require commercial plans to cover substance use treatment. Veterans can also access care through the Northport VA Medical Center on Long Island, and one local facility accepts TRICARE. Coverage varies by plan and network status, so verify benefits before you commit. Major carriers active in New York include:

• Empire BlueCross BlueShield
• Excellus BlueCross BlueShield
• UnitedHealthcare
• Cigna
• Aetna
• MVP Health Care
• Fidelis Care

Other Low-Cost Options

For those without full coverage, five Riverhead centers offer financial assistance and three offer sliding-scale fees. OASAS-funded programs serve residents regardless of ability to pay, and treatment scholarships can help close the gap.

Accreditation

Accreditation signals that a program meets independent quality standards. Among Riverhead area facilities, two hold Joint Commission accreditation and one holds CARF accreditation, including Seafield Center. Accreditation is separate from OASAS licensing, which every legitimate New York substance use provider must maintain.

Riverhead offers care across the continuum, with 3 detox programs, 3 inpatient programs, and 8 outpatient clinics reported locally, plus sober living. Most facilities also treat co-occurring mental health conditions.

3 medical detox facilities

3 inpatient rehab programs

8 standard outpatient clinics

8 dual diagnosis programs

3 sober living homes

Medical detox provides 24-hour supervision to manage withdrawal safely and is the usual first step for opioid or alcohol dependence. Three area programs offer medically supervised detox, including Seafield’s Westhampton Beach campus.

Inpatient and residential rehab provides structured, live-in treatment. Three local inpatient rehab programs serve people who need to step away from daily triggers, with more residential options across Suffolk County.

Outpatient treatment lets people live at home while attending scheduled sessions, and it is the most common local format, with 8 clinics reported. It suits people balancing work or family.

Dual diagnosis care treats addiction alongside conditions like depression or anxiety. Eight reporting facilities address co-occurring disorders, which matters given how often mental health and substance use overlap.

Sober living offers substance-free housing that supports the transition back to independent life. Three local homes provide this option, paired with aftercare planning.

Many Riverhead facilities tailor treatment to specific groups and substances. The counts below reflect programs that report each specialty focus.

9 young adult programs

8 alcohol rehab programs

7 men’s programs

7 women’s programs

7 opioid rehab programs

2 programs for older adults

1 LGBTQ+ friendly program

Programs for young adults are the most widely reported specialty locally, and eight programs address alcohol use disorder while seven treat opioid use disorder. Facilities also serve women, men, and older adults, and one offers LGBTQ+ affirming addiction care.

Cost should not keep anyone from help. Riverhead residents can reach crisis support, treatment access lines, and harm-reduction resources at no charge, including crisis and suicide-prevention support around the clock.

Crisis and Helplines

• 988 Suicide & Crisis Lifeline: Call or text 988 any time for a mental health or substance use crisis.
• New York HOPEline: 1-877-846-7369, or text HOPENY to 467369, for free, confidential, 24/7 help and referrals to OASAS-certified treatment.
• Suffolk County Community Mental Hygiene Services: Local treatment access, crisis support, and referrals.

Local Treatment and Recovery

• Seafield Center: OASAS-licensed, Joint Commission-accredited outpatient care in Riverhead, with detox and inpatient services in Westhampton Beach (seafield.com).
• Suffolk County Division of Community Mental Hygiene Services: County-coordinated treatment access and recovery support (suffolkcountyny.gov).

Government and Harm Reduction

• OASAS free naloxone and test strips: Order naloxone and fentanyl or xylazine test strips at no cost through the state portal, and find treatment at FindAddictionTreatment.ny.gov.
• N-CAP: New York’s Naloxone Co-payment Assistance Program covers up to $40 in pharmacy co-pays; uninsured residents can get naloxone free.
• SAMHSA National Helpline: 1-800-662-4357, free and confidential treatment referrals, 24/7.

Riverhead sits in Suffolk County, which recorded roughly 400 opioid overdose deaths in 2023, among the highest county totals in New York. Statewide, more than 4,500 New Yorkers died of a drug overdose in 2024, but overdose data show one of the nation’s steepest declines, driven by naloxone saturation and expanded medication for opioid use disorder.

1. New York State Office of Addiction Services and Supports. (2025). Overdose death dashboard and treatment resources. oasas.ny.gov.
2. Suffolk County Department of Health Services. (2024). Opioid overdose data and response. suffolkcountyny.gov.
3. Centers for Disease Control and Prevention. (2025). Provisional drug overdose death counts, New York.
4. Seafield Center. (2025). Detox, inpatient, and outpatient treatment services. seafield.com.
5. National Center for Drug Abuse Statistics. (2022). Average Cost of Drug Rehab by Type, State and More.