Substance Use Treatment in Portsmouth, NH

Greater Seacoast

What Does Greater Seacoast Offer?

Greater Seacoast is a substance use treatment facility at 8 Greenleaf Woods Drive, Portsmouth, New Hampshire, offering detox and outpatient treatment. It accepts Medicaid, Medicare, private insurance, TRICARE, state-financed insurance, IHS/tribal funds and self-pay and offers a sliding fee scale. Medication treatment: buprenorphine and naltrexone.

Reviewed by Michael Rupe ·October 2, 2026

8 Greenleaf Woods Drive
Portsmouth, NH 03801

Listed in SAMHSA's FindTreatment.gov, checked October 2026. A listing is not an endorsement. Call to confirm services, openings and costs before you go.

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Treatment facility (SAMHSA listing)This facility

Types of Care at Greater Seacoast

Outpatient
Outpatient detoxification
Outpatient methadone/buprenorphine or naltrexone treatment
Regular outpatient treatment

Payment, Insurance and Help Paying

IHS/Tribal/Urban (ITU) funds
Medicare
Medicaid
Federal military insurance (e.g., TRICARE)
Private health insurance
Cash or self-payment
State-financed health insurance plan other than Medicaid
SAMHSA funding/block grants
Sliding fee scale (fee is based on income and other factors)

Medication Treatment

Buprenorphine detoxification
Buprenorphine maintenance
Prescribes buprenorphine
Prescribes naltrexone
Relapse prevention with naltrexone
Accepts clients using MAT but prescribed elsewhere
Lofexidine or Clonidine detoxification
Acamprosate (Campral®)
Disulfiram
Buprenorphine with naloxone
Buprenorphine without naloxone
Buprenorphine (extended-release, injectable)
Naltrexone (oral)
Naltrexone (extended-release, injectable)
Clonidine

Detox Services

Alcohol Detoxification
Methamphetamines detoxification
Opioids detoxification
Medication routinely used during detoxification

Who the Program Serves

Ages: Children/Adolescents
Ages: Young Adults
Ages: Adults
Ages: Seniors
Accepts: Female
Accepts: Male

Language Services

Sign language services for the deaf and hard of hearing

Licensing and Accreditation

Federally Qualified Health Center

Treatment Approaches

Brief intervention
Motivational interviewing
Relapse prevention
Substance use disorder counseling
Telemedicine/telehealth therapy
Trauma-related counseling

Assessment, Recovery Support and Other Services

Comprehensive mental health assessment
Comprehensive substance use assessment
Interim services for clients
Outreach to persons in the community
Complete medical history/physical exam
Screening for tobacco use
Screening for substance use
Screening for mental disorders
Aftercare/continuing care
Discharge Planning
Naloxone and overdose education
Outcome follow-up after discharge
Housing services
Assistance with obtaining social services
Child care for clients' children
Early intervention for HIV
Mental health services
Transportation assistance
Integrated primary care services
Suicide prevention services
Drug and alcohol oral fluid testing
Drug or alcohol urine screening
HIV testing
STD testing
TB screening
Metabolic syndrome monitoring
Testing for Hepatitis B (HBV)
Testing for Hepatitis C (HCV)
Hepatitis A (HAV) vaccination
Hepatitis B (HBV) vaccination

Before you commit, confirm openings, costs and the program's state license. How to choose a rehab you can trust lists the questions to ask when you call, and addiction treatment in New Hampshire lists the state's treatment agency.