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  • Adult Partial Hospitalization Program

  • Multidisciplinary Team

  • Mark Zimmerman, MD, is director of the Partial Hospital Program and Outpatient Practice at Rhode Island Hospital.

    Dr. Zimmerman received his medical degree from Chicago Medical School. He completed his postgraduate training at the Medical College of Pennsylvania.

    Dr. Zimmerman is board certified in psychiatry and is professor of psychiatry and human behavior at The Warren Alpert Medical School of Brown University. 

    He is principal investigator of the Rhode Island Methods to Improve Diagnostic Assessment and Services (MIDAS) project. He is the author of more than 300 articles and serves on the editorial board of 10 journals.

    He is the author of the recently revisedInterview Guide to Diagnose DSM-5 Psychiatric Disorders and the Mental Status Examination 



    Zimmerman

    Jonathan Barker, MD, is a psychiatrist in the Rhode Island Hospital Partial Hospital Program. 

    Dr. Barker received his medical degree from the State University of New York in Brooklyn. He completed his postgraduate training in general psychiatry at Tufts Medical Center and forensic psychiatry at Case Western Reserve University Hospitals.

    Dr. Barker has a special interest in law enforcement and the mentally ill, on which he has written and has lectured in several states.  






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    Kristy Dalrymple, PhD, is a licensed clinical psychologist, associate director of the outpatient psychiatry practice at Rhode Island Hospital, and director of adult psychology at Rhode Island and The Miriam hospitals.

    Dr. Dalrymple received her doctorate from Drexel University.  She completed her residency in psychology at the State University of New York Upstate Medical School and her fellowship in clinical research at the Alpert Medical School.

    She is an assistant professor (research) in the Alpert Medical School department of psychiatry and human behavior. She is a member of the Association for Behavioral and Cognitive Therapies and the Association for Contextual Behavioral Science, and serves as an associate editor for the Journal of Contextual Behavioral Science.  

     



    Dalrymple

    Catherine D’Avanzato, PhD, is a licensed clinical psychologist at the Rhode Island Hospital Partial Hospital Program.

    Dr. D’Avanzato received her PhD in clinical psychology from the University of Miami.  She completed her residency in clinical psychology, as well as a clinical research fellowship, at The Warren Alpert Medical School of Brown University.She is a member of the Association for Behavioral and Cognitive Therapies, the Association for Contextual Behavioral Science, and the Anxiety Disorders Association of America.

    She is the author of scientific publications on the etiology, assessment and treatment of depression and related anxiety disorders.


     



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    Darren W. Holowka, PhD, is a staff psychologist in the adult Partial Hospital Program at Rhode Island Hospital.

    Dr. Holowka received his PhD in clinical psychology from the University of Massachusetts Boston.  He completed his residency at the Royal Ottawa Mental Health Centre and a clinical research fellowship at the National Center for PTSD, VA Boston Healthcare System. He is a clinical assistant professor in the department of psychiatry and human behavior at the Warren Alpert Medical School of Brown University.

    He is the author of scientific publications on the assessment and treatment of posttraumatic stress disorder and other consequences of psychological trauma, including anger, guilt, and functional impairment.


     


    Holowka

    Kirsten Langdon, PhD, is a staff psychologist at the Rhode Island Hospital Partial Hospital Program.

    Dr. Langdon received her PhD in clinical psychology from the University of Vermont. She completed her residency in clinical psychology at The Warren Alpert Medical School of Brown University, and a fellowship in clinical research in the National Center for PTSD – Women’s Health Sciences Division at the VA Boston Healthcare System.

    Dr. Langdon is an active member of the Society for Research on Nicotine and Tobacco and the Association for Contextual Behavioral Science. She is the author of scientific publications focused on identifying and modifying cognitive and affective mechanisms that underlie the co-occurrence of anxiety and substance use disorders.


     

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    Sarit Lesser, PsyD, is a postdoctoral fellow in clinical psychology at the Rhode Island Hospital Partial Hospital Program and The Warren Alpert Medical School of Brown University.

    Dr. Lesser received her PsyD in clinical psychology from William James College. She completed her psychology internship at the University of Massachusetts, Dartmouth, and served as a psychology intern at the university counseling center.

    She is a member of the Association for Contextual Behavioral Science and Division 35: Society for the Psychology of Women within the American Psychological Association.





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    Sarah McCutcheon, MA, is an acute care psychotherapist at the Rhode Island Hospital Partial Hospital Program.

    She received her master of arts degree in counseling psychology from William James College (formerly the Massachusetts School of Professional Psychology) in Newton, Massachusetts.






     

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    Bess Mehring, MD, is a psychiatrist in the Rhode Island Hospital Partial Hospital Program.

    Dr. Mehring received her medical degree from Jefferson Medical College in Philadelphia and completed her residency in family medicine and psychiatry at the University of Iowa Hospitals and Clinics. Dr. Mehring is board certified in psychiatry.  






     

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    Theresa A. Morgan, PhD, is a staff psychologist at the Rhode Island Hospital Partial Hospital Program.

    Dr. Morgan received her doctorate from the University of Iowa.  Her predoctoral and postdoctoral training were both completed at The Warren Alpert Medical School of Brown University, where she is currently a clinical assistant professor in the department of psychiatry and human behavior.

    She is an active member of the Society for Research in Psychopathology, Association for Contextual Behavioral Science, and the North American & International Societies for the Study of Personality Disorders, and has authored scientific publications on the assessment, diagnosis, and treatment of personality and mood disorders.


     


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    Brian Pilecki, PhD, is a postdoctoral fellow in clinical psychology at the Rhode Island Hospital Partial Hospital Program and The Warren Alpert Medical School of Brown University. 

    Dr. Pilecki received his PhD in clinical psychology from Fordham University, and completed his internship in clinical psychology at the Weill-Cornell Medical College in New York. Dr. Pilecki is the deputy chairperson of a national Association for Contextual Behavioral Science (ACBS) committee, as well as membership chairperson of a local ACBS chapter.

    He is the author of scientific publications in the areas of anxiety disorders, mindfulness-based treatments, and the relationship between theory and practice in psychotherapy.



     

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    Sydney Moon, MD, is a psychiatrist at the Rhode Island Hospital Adult Partial Hospital Program. She received her medical degree from Korea University, Seoul South Korea. She completed her residency training at the University of Pennsylvania and Institute of Psychiatry at Pennsylvania Hospital.

    Dr. Moon is double-board-certified in general psychiatry and psychosomatic medicine by the American Board of Psychiatry and Neurology. She received her fellowship training at the M.D. Anderson Cancer Center, University of Texas, serving cancer patients’ psychiatric needs. 

     

    Thomas Sheeran, PhD, is a clinical psychologist in the Rhode Island Hospital Partial Hospital Program, Mood Disorders Program, and Family Therapy Program.  He also provides services through the Miriam Hospital Nursing Home Psychiatry Consultation Program.

    Dr. Sheeran received his PhD in clinical psychology from the University of Virginia.  He completed postdoctoral training at The Warren Alpert Medical School of Brown University (clinical research) and at the Institute of Geriatric Psychiatry, Weill-Cornell Medical College (geriatric mental health services).