McLean SouthEast Adult Psychiatric Partial Hospital Program

Day program treatment for adults with mood disorders. Call us today to speak to admission staff.

The McLean SouthEast (MSE) Adult Psychiatric Partial Hospital Program focuses on group therapies and skill building to treat individuals ages 18 and older struggling with depression and anxiety disorders, with or without other co-occurring mental health conditions such as post-traumatic stress disorder (PTSD) and personality disorders.

Covered by most health insurance providers, our day program accommodates up to 16 individuals in need of more intensive care than is offered through outpatient services. The program operates Monday through Friday, 9am to 3pm. Average participation is between 5 and 10 days.

Please note that we do not treat active symptoms of psychosis or substance addiction. The program is voluntary and patients must agree to abstain from using alcohol and drugs for the duration of the program.

For more information or to make a referral, please call 774.419.1040.

The MSE Adult Psychiatric Partial Hospital Program is ideal for individuals who:

  • Have mood disorders such as depression or anxiety, with or without other coexisting mental health conditions
  • Require intensive treatment but are stable enough for partial hospital level of care
  • Are sober or willing to abstain from alcohol and drugs during treatment

Patients follow structured schedules targeted at reducing the severity of the patient’s symptoms and focused on different cognitive behavior therapy strategies to prevent relapse.

Designed to engage patients in their recovery, each day is carefully planned with ample time for self-focus, team meetings, group treatment, and expressive arts therapy.

We understand that mental health affects not only the individual but also the entire family, which is why our compassionate and experienced staff takes a comprehensive approach to treatment and recovery, incorporating loved ones in patient care as appropriate.

Our evidence-based treatment and therapy models are informed by cutting-edge research conducted at McLean and around the world. By incorporating various approaches, treatment can be customized for each individual to help ensure recovery.

Our expert staff specializes in a wide range of mental health disorders and is devoted to improving the quality of life of patients and their families.

The McLean SouthEast Adult Psychiatric Partial Hospital Program is located in Middleborough, Massachusetts. Established in 1999 in conjunction with the MSE Adult Psychiatric Inpatient Program, the programs provide mental health care and resources to patients and families in the southeast region of the state, including Cape Cod and the Islands.

MSE is located in a recently renovated one-story building in a private, suburban neighborhood. The spacious facility, with landscaped grounds and comfortable common areas, offers a warm and welcoming environment that is conducive to treatment and rehabilitation.

Treatment Approach

Our therapeutic day program provides treatment for patients who do not require 24-hour care yet need more structure and intensive psychiatric supervision than is available in outpatient treatment. Our highly structured intervention is ideal for individuals who are in crisis but can safely reside in the community.

Using cutting-edge treatments, tools, and techniques to help ensure recovery, clinicians focus on a person-centered model to create a customized treatment plan for each individual based on his or her specific diagnoses, symptoms, and goals.

Our multidisciplinary treatment approach combines structured group programming with case management and psychiatry. Our capacity is 16 patients, with the length of participation averaging 5-10 days. The program operates Monday through Friday from 9am to 3pm.

The emphasis of the day program, reinforced by evidence-based treatment and cutting-edge therapy models, is to provide a sufficient level of stability for the patient to be able to transition to an outpatient level of care.

Group having a discussion in chairs

Group therapy is a main component of treatment at the MSE Partial Hospital Program

The day program is available to referrals from community providers and hospitals or as step-down treatment from MSE’s inpatient care.

On the first day, each patient meets with members of the clinical treatment team who work together to provide psychiatric stabilization, evaluate symptoms, conduct a full medication assessment, and identify family support and community resources.

Patients attend an intensive schedule of groups and expressive arts therapies. The specifics of the schedule vary from day to day so that the groups attended over the course of a week may cover a variety of topics, including mindfulness, motivation, illness and symptom management, social skills, education, impulse control, cognitive behavior therapy (CBT), expressive therapies, and more.

Each day is carefully planned and allows time for self-focus as well as group work.

While our primary modality is CBT—a therapy model that helps patients connect thoughts and actions—we also employ other approaches such as the systems model, which focuses on patient-family and patient-community relationships to help nurture change and development, and positive psychology, which focuses on building upon good thoughts, feelings, and behaviors as well as boosting personal strengths.

We help identify appropriate community agencies and primary care providers for each patient and family.

The program includes medication management to reduce symptoms and restore the patient’s functional abilities. We also emphasize patient education to increase overall understanding of the illness and strengthen coping skills. Staff work with patients to set goals for pursuing a meaningful life path.

Family meetings are encouraged at McLean SouthEast. Our team meets with the family to collect information and collaborate on the treatment plan. We also focus on family education to help strengthen the patient’s social support system and improve management of stress for family members.

Admission & Cost


The McLean SouthEast Adult Psychiatric Partial Hospital Program is suitable for patients ages 18 and older experiencing mood disorders such as depression and anxiety, with or without co-occurring diagnoses such as PTSD or personality disorders.

Our program is appropriate for those who could benefit from structured partial hospital (day program) care.

For more information or to make a referral, please contact our admissions coordinator:

Phone: 774.419.1040

Referral Form

Patients should have their outpatient provider fill out and return the form below so that staff can assess whether partial hospital care and this program is a good fit for the patient.


MSE Adult Psychiatric Partial Hospital Program is covered by most insurance providers. We understand that navigating the insurance system can be challenging. We welcome your questions and concerns.

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.

Treatment Team

Program Leadership

Mark Longsjo, LICSW

Mark Longsjo, LICSW, Program Director

Mr. Longsjo oversees the adult inpatient and partial hospital programs at McLean SouthEast (MSE). He joined McLean Hospital in 1999 when MSE was established and has led the program’s growth over the years to serve more patients with enhanced services over a wider geographic area. He is a recipient of McLean’s Vision of Excellence Award and the Partners in Excellence Award and has been a member of the President’s Cabinet, the hospital’s leadership group.

Duncan C. MacCourt, JD, MD

Duncan C. MacCourt, JD, MD, Associate Medical Director

Dr. MacCourt currently serves as the attending psychiatrist for the adult partial hospital program at MSE and is an assistant professor of psychiatry at Harvard Medical School. Fellowship trained in cancer psychiatry, he publishes in the fields of medicine, psychiatry, and law. He teaches in the Harvard South Shore residency program and at Harvard Law School, where he is a lecturer.

Staff and Associates

Each member of our highly trained team has an extensive background in treating adults with mental health conditions and experience working with patients from diverse cultural and socioeconomic backgrounds from across the country and around the world.

Working in close partnership with patients and families, our clinicians provide high-quality care tailored to each individual’s needs. Our multidisciplinary staff consists of board-certified psychiatrists, licensed psychologists and clinical social workers, and expressive therapists.

The MSE Adult Partial Hospital Program is part of McLean’s Division of Depression and Anxiety Disorders led by chief Kerry J. Ressler, MD, PhD.

Frequently Asked Questions

Where is MSE Adult Psychiatric Partial Hospital Program located?

The program is located at McLean SouthEast in Middleborough, Massachusetts. For more information on directions, parking, and local accommodations, please visit our Maps & Directions page.

Who benefits most from the program?

Our program focuses on treating adults with depression and anxiety disorders.

Is family involved in treatment?

Family meetings are encouraged at McLean SouthEast. The interdisciplinary treatment team expects to meet with the family to collect information and collaborate on the treatment plan.

Is smoking permitted?

Smoking is allowed in designated outdoor areas only.

Are cell phones allowed?

Cell phones are not permitted during treatment to prevent disruption of the program, however patients are welcome to use their devices on breaks between groups.

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?

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

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.

McLean Is Here to Help

Let us help you or your loved one. Call us today to learn more about our program.