About Keystone Hall
Keystone Hall is a residential drug and alcohol rehab in Nashua, New Hampshire operating as part of the Harbor Care nonprofit network.
Keystone Hall reflects Harbor Care's mission driven approach integrating addiction recovery with healthcare, housing, and broader life stability resources.
Inpatient Detox and Treatment
Treatment may begin with an assessment to determine the appropriate level of care which can include inpatient detox, short-term or long-term residential rehab, or step-down outpatient services.
Within Harbor Care's broader continuum, clients may also access a high intensity outpatient program, regular outpatient care, and outpatient buprenorphine or naltrexone services.
Clients can expect evidence-based and trauma-informed care, with therapies such as cognitive behavioral therapy and motivational interviewing using the Matrix Model, contingency management and relapse prevention, anger management, and 12-step facilitation.
Dual diagnosis support is available for clients managing co-occurring mental health and substance use disorders.
Quick Facts About Keystone Hall in Nashua
- Levels of care: Inpatient detox, short and long term residential, outpatient, MAT, and telehealth through Harbor Care.
- Who they treat: Adults, including specialized programs for pregnant and postpartum women and clients with co-occurring disorders.
- Approach: Trauma informed, evidence based care with peer support and relapse prevention.
- Payment options: Medicaid, Medicare, most private insurance, TRICARE, self pay, and a sliding fee scale.
- Accreditation: CARF accredited with state substance use agency oversight.





