Mclean Hospital

Alcohol, Drug, and Addiction Partial Hospital Program

Intensive Day Treatment for Addiction to Drugs or Alcohol

Please Note: Treatment in some of McLean’s programs has been moved online due to the COVID-19 crisis.

Please contact the program directly for more information.

The Alcohol, Drug, and Addiction Partial Hospital Program provides treatment for individuals with substance use disorders, including the misuse of alcohol, prescription drugs, heroin, cocaine, marijuana, or opioids such as Oxycontin or Percocet.

A partial hospital (day) program is an intensive, therapeutic environment for patients who do not require 24-hour care yet need more structure than is available in outpatient treatment. Our program is designed for patients whose misuse of substances does not interfere with their ability to travel to the program each day and who are able to successfully manage their symptoms while at home or in a residential care setting.

For more information or to make a referral, please call 617.855.3505.

Our expert staff specialize in treating individuals whose substance use disorder is complicated by other psychiatric illnesses such as depression, anxiety, bipolar disorder, and post-traumatic stress disorder.

The Alcohol, Drug, and Addiction Partial Hospital Program is ideal for those who:

  • Seek intensive addiction care for substance use disorders, with or without any other mental health symptoms
  • Require more structure than is available in traditional outpatient care and are able to successfully manage their symptoms while at home or in a residential care setting

Through educational and process-oriented group therapy sessions, we assist patients through the early stages of addiction recovery.

The program runs Monday through Friday from 8:30am to 2pm. Each morning begins with meditation, followed by sessions that address early sobriety issues, relapse prevention skills, and other individual and group therapy depending on the patient’s treatment plan. By attending groups during the day and spending evenings in the community, the patients have the opportunity to test the strategies learned in treatment.

Group therapy at McLean
McLean’s Alcohol, Drug, and Addiction Partial Hospital Program offers intensive addiction day treatment

Located in Proctor House on McLean’s Belmont campus, the program combines personalized treatment and the opportunity for patients to utilize new skills through independent living. Traditionally treatment takes place over 10 to 14 days and is covered by most insurance providers.

Many of our partial hospital patients have completed the Alcohol, Drug, and Addiction Inpatient Program before stepping down to this less intensive level of care.

Our team of psychiatrists, licensed psychologists, family therapists, and registered nurses specialize in alcohol and drug addiction and related mental health disorders, and are devoted to improving the quality of life of patients and their families.

The emphasis of the day program, reinforced by scientifically proven treatments and cutting-edge therapy models, is to provide a sufficient level of stability for the patient to be able to gradually leave treatment.

According to the National Council on Alcoholism and Drug Dependence, 17.6 million Americans, or 1 in every 12 adults, struggle with alcohol misuse or dependence.

We work in conjunction with a broad range of programs across the Center of Excellence in Alcohol, Drugs, and Addiction in order to provide comprehensive substance use treatment for patients at every level of care, from intensive inpatient detoxification to individual and group outpatient therapy offered by McLean’s Adult Outpatient Services.

In the News

Read more about how McLean and the Center of Excellence in Alcohol, Drugs, and Addiction are battling the opioid epidemic.

Treatment Approach

The Alcohol, Drug, and Addiction Partial Hospital Program works in close partnership with patients and families to focus on creating a customized treatment plan for each individual based on his or her substance use history and symptoms, the severity of the symptoms, and other co-occurring psychiatric diagnoses.

Treatment plans regularly include a combination of individual and group therapies, a variety of proven addiction treatment models, and medications that help patients manage their symptoms and transition back to their daily lives.

Upon admission, we create a tailored treatment plan for each patient targeted at reducing the severity of the patient’s symptoms. We provide tools, ongoing support, and resources to prevent relapse. Designed to engage patients in their treatment, each day is carefully planned according to the individual’s needs, with ample time for self-focus and group work.

Each patient meets with a behavioral therapist (a licensed psychologist or clinical social worker) several times a week. The therapist develops a plan that serves as a guideline for staff to ensure quality and consistency in treatment. Patients meet with a psychiatrist weekly, or more frequently if required, for medication consultation.

Stressing recovery and relapse prevention, the program utilizes a number of therapy models informed by psychiatric research conducted by investigators within the Center of Excellence in Alcohol, Drugs, and Addiction, throughout the hospital, and around the world. Our immersive schedule helps patients become more open and willing to participate in treatment, decreases behavioral symptoms, increases normalized family, work, and social functioning, and emphasizes education and support.

Integrated group therapy (IGT) is an evidence-based treatment for co-occurring bipolar and substance use disorders that was developed by McLean’s Roger D. Weiss, MD, and Hilary S. Connery, MD, PhD. IGT is designed to teach essential recovery behaviors and relapse prevention skills that apply to both illnesses.

Clinician talks to patient
Staff in the Center of Excellence in Alcohol, Drugs, and Addiction are committed to providing world-class addiction care

Relapse prevention therapy, a form of cognitive behavior therapy, incorporates self-control, identifying positive and negative consequences and high-risk situations, and implementing coping strategies in order to help patients maintain abstinence.

We also use other treatment modalities, such as dialectical behavior therapy (DBT) which emphasizes the development of four skill sets: mindfulness, interpersonal effectiveness, emotion regulation, and distress tolerance.

Motivational enhancement therapy is a counseling approach that helps individuals resolve their ambivalence about engaging in treatment and ceasing substance use by evoking rapid and internally motivated change.

Family involvement is encouraged and with the permission of the patient, family members are included in assessment, care, and aftercare planning. We also offer support and education, including a family support group at Proctor House every Monday evening for families of McLean Hospital patients.

To complement our programs’ services and encourage individuals’ initiatives in their own treatment course, we encourage patients to seek peer support. Organizations such as Alcoholics Anonymous and Narcotics Anonymous offer self-help groups on McLean’s campus and other nearby areas.

Admission & Cost


The Alcohol, Drug, and Addiction Partial Hospital Program provides day treatment for individuals ages 18 and older struggling with substance misuse with or without other co-occurring mental health diagnoses, such as depression, anxiety, PTSD, and bipolar disorder.

For further information about our program or to make a referral, please contact our admissions coordinator:

Phone: 617.855.3505

Prospective patients and families or referring clinicians seeking day program care should fill out the Alcohol, Drug, and Addiction Partial Hospital Patient Referral Form. Once the form is returned to the program, we can help an individual determine if this is an appropriate option.


The Alcohol, Drug, and Addiction Partial Hospital Program is covered by most insurance providers. McLean Hospital accepts Medicare, Massachusetts Medicaid, and many private insurance and managed care plans.

More information on insurance providers accepted by McLean Hospital may be found on the Mass General Brigham website. You may also find it beneficial to review McLean’s patient billing and financial assistance information.

We understand that navigating the insurance system can be challenging. We welcome your questions and concerns.

Treatment Team

Program Leadership

Ruth Reibstein, EdDRuth Reibstein, EdD, Program Director

Dr. Reibstein is an instructor in psychology in the Department of Psychiatry at Harvard Medical School and has been a licensed psychologist for 25 years. Her clinical interests include integrated treatment for addiction, mood and anxiety disorders, women’s recovery issues, and mindfulness group therapy skills.

Olivera J. Bogunovic, MD

Olivera J. Bogunovic, MD, Medical Director

Dr. Bogunovic is also the medical director of Ambulatory Services for the Center of Excellence in Alcohol, Drugs, and Addiction. Her primary areas of clinical innovation are in developing effective treatments for benzodiazepine use disorders and developing novel treatments for elderly patients with substance use disorders. In addition to clinical and administrative roles, Dr. Bogunovic also teaches medical students and residents and addiction and geriatric fellows.

Hilary S. Connery, MD, PhDHilary S. Connery, MD, PhD, Clinical Director, Center of Excellence in Alcohol, Drugs, and Addiction

Dr. Connery’s expertise includes treatment of opioid use disorders and integrated treatments for co-occurring substance use disorders and other mental illnesses. She was a contributor to the APA Practice Guidelines for the treatment of substance misuse and is an investigator in the New England Consortium of the NIDA Clinical Trials Network. Her current research efforts address self-injury mortality and connections between suicide and drug overdose.

Roger D. Weiss, MDRoger D. Weiss, MD, Senior Consultant

Currently chief of the Center of Excellence in Alcohol, Drugs, and Addiction, Dr. Weiss’ career has focused on treatment and clinical research with substance-dependent patients. He has authored over 300 publications, including several books, and is the recipient of numerous National Institutes of Health grants for developing integrated group therapy, as well as leading a multisite treatment study of prescription opioid dependence.

Shelly F. Greenfield, MD, MPHShelly F. Greenfield, MD, MPH, Senior Consultant

Dr. Greenfield is an addiction psychiatrist, clinician, and researcher. Her research focuses on treatment, gender differences, and health services as they relate to substance use. She is a recipient of National Institute on Drug Abuse (NIDA) funding for mentoring in substance use disorder patient-oriented research as well as for developing and testing a new manual-based group therapy for women with substance use disorders.

Nancy Merrill, PMHCNS, BC

Nancy Merrill, PMHCNS, BC, Senior Consultant

A board-certified advanced practice psychiatric nurse for more than 30 years, Ms. Merrill has been working in McLean’s Center of Excellence in Alcohol, Drugs, and Addiction for the past 20 years. During her time at McLean, she has been involved in several national research projects, including the COMBINE study, the Topamax medication study and the integrated group therapy study. She is currently the program director of the Alcohol, Drug, and Addiction Inpatient Program.

Staff and Associates

Our multidisciplinary clinical staff have extensive background in the treatment of substance use disorders and co-occurring mental health conditions. Our team of clinicians and support staff includes board-certified addiction psychiatrists, licensed psychologists and family therapists, registered nurses, and mental health specialists.

Working in close partnership with patients and families, we create and provide high-quality care tailored to each individual’s needs. Staff have experience working with patients from diverse cultural and socioeconomic backgrounds from across the country and around the world.

The Center of Excellence in Alcohol, Drugs, and Addiction is led by Roger D. Weiss, MD.


Where is the Alcohol, Drug, and Addiction Partial Hospital Program located?

The program is located on the Belmont campus, in Proctor House. For more information on directions, parking, and local accommodations, please visit our Maps & Directions page.

Who benefits most from the Alcohol, Drug, and Addiction Partial Hospital Program?

We focus on treating adults with substance use disorders, with or without other co-occurring psychiatric conditions. The program is best suited to those who need a safe and supportive treatment atmosphere but do not require around-the-clock care.

Is family involved in treatment?

Family involvement is strongly recommended. With permission of the patient, family members can be involved in assessment, treatment, and aftercare planning.

Is smoking permitted?

Smoking is allowed in designated outdoor areas, except during treatment. No smoking is allowed inside any of our buildings.

Are cell phones allowed?

Except during groups, cell phones are permitted, with some guidelines to prevent disruption of the program and other patients and to protect privacy.

Is aftercare planning a part of the program?

The treatment team works closely with the individual as well as with family, significant friends, and outside providers to develop a personalized aftercare plan. Recommendations by staff are made based upon clinical needs, progress made during treatment, and long-term treatment goals.

Can former patients access their medical records?

All requests for medical records should be directed to McLean’s Health Information Management Department.

Are support groups offered during and after treatment?

To complement our programs’ services and encourage individuals’ initiatives in their own treatment course, many self-help groups are hosted by McLean.

Does McLean gather patient feedback?

McLean is dedicated to maintaining high-quality and effective patient care. To ensure that those standards remain at the highest level, we utilize a number of feedback instruments and quality indicators. Among these tools are the Perceptions of Care survey which monitors patient satisfaction and BASIS-24™, a psychiatric outcomes measurement tool created at McLean and widely used in the U.S. and around the world, which delivers feedback on the patient care experience.

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