Sabine Wilhelm, Ph.D., is the Donovan-Chien Family Endowed Professor in Psychology at Harvard Medical School, Chief, Division of Psychology at Mass General Brigham (MGB), Director of the Center for Obsessive Compulsive and Related Disorders (CORD) at Massachusetts General Hospital (MGH), and Director of the Center for Digital Mental Health in Psychiatry at MGH.

To address the increasing rates of mental health concerns in the context of a global mental health service provider shortage, her work has focused on the development of scalable digital and AI-powered approaches to assessment and treatment. Dr. Wilhelm has developed or is currently testing smartphone-based treatments for depression, anxiety, suicidality, OCD, and body dysmorphic disorder. She is currently working on AI-supported approaches to enhance the detection of high-risk behaviors and suicidality, machine learning algorithms to match patients with treatments, and generative AI to support more personalized and effective interventions. Her goal is to use technology-based interventions to expand global access to high-quality mental health care.

She has published over 375 papers and chapters, as well as nine books. Her h-index is 96. She has also given around 300 lectures on advances in psychotherapy, including many invited international keynotes focused on the opportunities and challenges associated with the use of AI in mental health care.  She has mentored more than 50 junior investigators in the field.

Ryan Jane Jacoby, Ph.D., is Assistant Director of the Center for OCD and Related Disorders (CORD) at Massachusetts General Hospital (MGH) and an Assistant Professor of Psychology (Psychiatry) at Harvard Medical School (HMS). Dr. Jacoby completed her undergraduate studies at Williams College and her Ph.D. in Clinical Psychology at the University of North Carolina at Chapel Hill. She completed her clinical internship and post-doctoral training at MGH/HMS. Dr. Jacoby is a licensed clinical psychologist whose clinical work focuses on exposure and response prevention (ERP) for OCD. Her research focuses on (a) understanding transdiagnostic mechanisms underlying the development and effective treatment of OCD and related disorders (e.g., intolerance of uncertainty, attentional/cognitive control), including using multi-method measurement approaches (e.g., eye-tracking, decision-making paradigms, psychophysiological/neurophysiological measures), and (b) augmenting ERP outcomes and characterizing treatment response (e.g., inhibitory learning approaches). Dr. Jacoby has published over 45 peer-reviewed articles, co-authored a book on treating OCD in adults (and its 2nd edition), and written several book chapters, resulting in an h-index of 26. She has received funding from the National Institute of Mental Health (K23) and the International OCD Foundation (IOCDF). Finally, she has received several honors for her research, including the Anxiety and Depression Association of America (ADAA) Alies Muskin Career Development Leadership Program Award in 2018 and the Association of Psychological Science “Rising Star” award in 2021.

Publications by Dr. Jacoby

Barbara holds a Master of Healthcare Administration from Suffolk University, which she received in 2014. She graduated from the University of Massachusetts, Amherst in 2006 with a B.A. in Psychology. Barbara has over 15 years of management experience and has worked as a Program Manager at the Center for OCD and Related Disorders (CORD) since 2009. She is now the Program Director at CORD and the Center for Digital Mental Health (CDMH).  

Anne Chosak, Ph.D., is Director of Psychological Services at the Center for OCD and Related Disorders (CORD), and Director of the CBT Program at Massachusetts General Hospital (MGH). She is a staff psychologist at MGH and Assistant Professor (part-time) at Harvard Medical School. Dr. Chosak received her Ph.D. in clinical psychology from SUNY at Albany in 2000. She received her post-doctoral training at CORD and was licensed in 2002. Dr. Chosak’s clinical and research background was in the anxiety disorders of adulthood, and her current clinical and research interests are in the OCD spectrum disorders of adulthood. Dr. Chosak serves on the Clinical Psychology Internship Training Committee at MGH.

Publications by Dr. Chosak

Dr. Lisa Zakhary is the Medical Director of the Massachusetts General Hospital (MGH) Center for OCD and Related Disorders (CORD) and Director of Pharmacology in the MGH Excoriation Clinic and Research Unit. She graduated from Harvard Medical School and completed her general adult psychiatry residency at MGH/McLean. Additionally, she earned a Ph.D. in molecular neurobiology and completed the Boston Psychoanalytic Society & Institute Fellowship during her medical training. She is Assistant in Psychiatry at MGH and Instructor in Psychiatry at Harvard Medical School. She specializes in providing medication treatments to individuals with OCD and related disorders. Additionally, Dr. Zakhary has a special interest in psychodermatology and as a resident, co-founded the MGH Comprehensive Skin Management Clinic, a psychiatry/dermatology clinic providing multi-disciplinary treatment to individuals with a variety of psychodermatologic conditions including compulsive skin picking, trichotillomania, and body dysmorphic disorder. As staff, she continues to explore ways to optimize psychodermatologic treatment through collaboration, education, and research. Her current research is focused on evaluating novel treatments for trichotillomania.

Publications by Dr. Zakhary

Dr. Josh Salvi is a psychiatrist at the MGH Center for OCD and Related Disorders, an Associate Program Director of the MGH/McLean Psychiatry Residency Program, Director of the Physician Scientist Training Program (PSTP) in Psychiatry, and an Investigator at the MGH Translational Research Center. Dr. Salvi also teaches medical students in multiple capacities at Harvard Medical School. Dr. Salvi earned his Ph.D. in Neuroscience from The Rockefeller University in the Laboratory of Sensory Neuroscience with A. James Hudspeth. He graduated from Weill Cornell Medical College and has received various awards, including the Gold Humanism Honor Society’s Humanism in Medicine Award, the John Metcalf Polk Prize for academic achievement in medical school, the American Psychiatric Association’s Leadership Fellowship, the NIMH Outstanding Resident Award Program, the Broad Institute’s Pamela Sklar Fellowship for psychiatric research. He has a research interest in behavioral and genetic studies in OCD and is thrilled to continue clinical work in the same area.

Natasha Bailen, Ph.D., is a staff psychologist in the Center for OCD and Related Disorders (CORD) at Massachusetts General Hospital and an Instructor in Psychology (Psychiatry) at Harvard Medical School. Dr. Bailen received her PhD in clinical psychology from Washington University in St. Louis, completed her clinical internship at the University of Chicago Medicine, and completed a postdoctoral fellowship at Boston University’s Center for Anxiety and Related Disorders (CARD). She is a licensed clinical psychologist in the state of Massachusetts and specializes in the cognitive-behavioral treatment of OCD, anxiety, and related disorders. Her research focuses on digital assessment and interventions for obsessive compulsive disorder (OCD), body dysmorphic disorder (BDD), anxiety, and depression, with a goal of leveraging technology to improve the accessibility of evidence-based mental health treatments.

Maria Lynn Buttolph, M.D. Ph.D., has been a staff psychiatrist and member of the Center for OCD and Related Disorders (CORD) since 1988. She participated in the original clinical trials that helped to determine effective medications for the treatment of OCD. She has treated a large number of patients with OCD, as well as OCD spectrum disorders, including trichotillomania. She has published numerous papers and has written a chapter about OCD and pregnancy. She is an Instructor at Harvard Medical School and at Massachusetts General Hospital.

Publications by Dr. Buttholph

Sarah Coe-Odess, PhD is a staff psychologist in the Center for OCD and Related Disorders (CORD) and an Instructor in Psychology (Psychiatry) at Harvard Medical School (HMS). She is also a staff psychologist in MGH’s Child Cognitive-Behavioral Therapy (CBT) Program. Dr. Coe-Odess received her PhD in clinical psychology from the University of Virginia. She completed her clinical internship at Cambridge Health Alliance/HMS and her post-doctoral fellowship at MGH/HMS. She is a licensed clinical psychologist in the state of Massachusetts and specializes in cognitive-behavioral therapy for OCD and related disorders and anxiety disorders. Her research aims to assess and develop evidence-based treatments to increase accessibility of mental health care for adolescents and adults, particularly through digital interventions.

Brynn DeLorenzo, Ph.D., is a staff psychologist in the Center for OCD and Related Disorders (CORD) at Massachusetts General Hospital (MGH) and an Instructor in Psychology (Psychiatry) at Harvard Medical School (HMS). She is also a staff psychologist on MGH’s inpatient psychiatric unit (Blake 11) and in the Psychological Evaluation and Research Lab (PEaRL). Dr. DeLorenzo received her PhD in clinical psychology from Loyola University Chicago. She completed both her clinical internship and post-doctoral fellowship at MGH/HMS. She is a licensed clinical psychologist in the state of Massachusetts and specializes in cognitive-behavioral therapy for OCD, anxiety, and related disorders. She also has a specialized interest in treating these disorders during the perinatal period for both birthing and non-birthing parents. Dr. DeLorenzo’s research aims to improve the accessibility of evidence-based mental health treatment by developing, implementing, and evaluating intervention programs, particularly digital technologies.

Susanne S. Hoeppner, Ph.D., M.Ap.Stat, is a biostatistician and epidemiologist at the Center for OCD and Related Disorders (CORD) and an Assistant Investigator in Psychology (Psychiatry) at the Massachusetts General Hospital/Harvard Medical School.  Dr. Hoeppner received her Ph.D. in Oceanography and Coastal Sciences and her Master in Applied Statistics from Louisiana State University and conducted three years of post-doctoral research in climate change ecology at the University of Massachusetts Boston and Purdue University.  With more than 12 years of experience in research and clinical investigation, she has extensive training and expertise in experimental design, statistical analysis and simulation modeling.  Dr. Hoeppner’s clinical interests are in dynamic health behavior modeling and positive psychology.  She has served as the principal statistician on pivotal trials approved by the FDA and has designed and analyzed Phase I-III studies in addiction, psychiatry, and psychology.  She also has ample experience setting up, updating, and overseeing the use of electronic data capture forms as implemented via REDCap, having designed and managed such databases for several single- and multi-site clinical trials at MGH, and routinely trains and advises research assistants, data managers, and clinical staff on principles of good clinical practice.

Adam Jaroszewski, Ph.D. is an Instructor at Harvard Medical School (HMS) and a Staff Psychologist in the Center for OCD and Related Disorders at Massachusetts General Hospital (MGH). He completed his doctorate in clinical psychology at Harvard University and clinical internship and postdoctoral fellowship a MGH/HMS. Dr. Jaroszewski is a licensed psychologist in the state of Massachusetts, whose clinical work focuses on the treatment of OCD and related disorders as well as anxiety and depression. His research focuses on examining the cognitive and affective factors that increase risk for the development and maintenance of self-injurious thoughts and behavior (SITB). He is particularly interested in using approaches from decision and affective science to understand why people decide to engage in SITB. He is also involved in developing scalable, smartphone delivered interventions for SITB and associated disorders (e.g., depression, BDD).

Nancy Keuthen, Ph.D., is an Associate Professor of Psychology (Psychiatry) at Harvard Medical School and Massachusetts General Hospital (MGH), Co-Founder and Director of the MGH Trichotillomania Clinic & Research Unit, and Chief Psychologist in the Center for OCD and Related Disorders (CORD). Dr. Keuthen received her Ph.D. in clinical psychology from SUNY at Stony Brook. She is internationally recognized as a leading clinician and researcher in trichotillomania. She has been instrumental in establishing awareness of and improving treatment for this disorder. Dr. Keuthen serves on numerous editorial and advisory boards, including the Scientific Advisory Boards of the Trichotillomania Learning Center and the Obsessive-Compulsive Foundation. Her clinical, research and teaching contributions have been largely focused on the cognitive-behavioral and pharmacological treatment of OCD and OCD-spectrum disorders, including skin picking, body dysmorphic disorder (BDD), and trichotillomania. She has authored numerous journal articles and book chapters and co-authored the popular book Help for Hairpullers.

Publications by Dr. Keuthen

Jennifer Ragan, Ph.D., Associate Director of the Adult Intensive Cognitive Behavioral Treatment Program.  She is staff psychologist at Massachusetts General Hospital and an Instructor in Psychology (Psychiatry) at Harvard Medical School. Dr. Ragan received her Ph.D. in Clinical Psychology from the University of Texas at Austin in 2005. There, Dr. Ragan received extensive training in cognitive-behavioral therapy and provided supervision to junior clinicians through Dr. Michael Telch’s Anxiety Research Lab at the University of Texas at Austin. She then completed her clinical internship and post-doctoral training through Massachusetts General Hospital/Harvard Medical School. Dr. Ragan is now a licensed psychologist and sees patients through the Center for OCD and Related Disorders (CORD) at Massachusetts General Hospital and in private practice. Her clinical interests are broad, in that she treats patients suffering from anxiety, mood, and eating disorders using both individual and group modalities. Her research interests center around the assessment and treatment of anxiety disorders, Obsessive Compulsive Disorder, and Body Dysmorphic Disorder.

Publications by Dr. Ragan

Jessica Rasmussen, Ph.D., is an Assistant in Psychology (Psychiatry) at Massachusetts General Hospital and an Instructor in Psychology at Harvard Medical School. During graduate school, Dr. Rasmussen received cognitive-behavioral training in the treatment of anxiety and mood disorders, as well as specialized training in the treatment of compulsive hoarding. Her research interests focus on the etiology, maintenance and treatment of compulsive hoarding and OCD.  She also specializes in the cognitive-behavioral treatment of obsessive-compulsive disorders and body dysmorphic disorder.

Publications by Dr. Rasmussen

Ivar Snorrason, Ph.D., is a staff psychologist at the Center for OCD and Related Disorders (CORD) at Massachusetts General Hospital (MGH) and an Assistant Professor in Psychology (Psychiatry) at Harvard Medical School (HMS). Dr. Snorrason completed his bachelor’s and master’s degrees in psychology at the University of Iceland and earned his Ph.D. in clinical psychology at the University of Wisconsin–Milwaukee. He completed postdoctoral training at the New York State Psychiatric Institute/Columbia University Medical School and at McLean Hospital. He is a licensed clinical psychologist who specializes in the treatment of OCD and related disorders. His research focuses on the etiology, nosology, and treatment of obsessive-compulsive and related disorders.

Publications by Dr. Snorrason

Dr. Cadence Trapini is a psychiatrist at the Center for OCD and Related Disorders (CORD) and at the Primary Care Psychiatry Group at Massachusetts General Hospital (MGH). She completed her medical training at Stony Brook School of Medicine in New York before moving to Chicago for her general psychiatry residency at Rush University Medical Center. Additionally, Dr. Trapini completed the Jungian Psychotherapy Program at the C G Jung Institute of Chicago.

Aisha Usmani, Ph.D., is an internationally sought-after licensed clinical psychologist specializing in cognitive-behavioral treatments (CBT) of anxiety and OCD disorders, including Obsessive-Compulsive Disorder (OCD), Panic Disorder, Agoraphobia, Generalized Anxiety Disorder (GAD), Social Phobia, and Specific Phobias. Dr. Usmani also has treatment expertise in Comprehensive Behavioral Intervention for Tics (CBIT) and Mindfulness-Based Intervention for Tics (MBIT) for Tourette’s Disorder, Chronic Motor Tics, Chronic Vocal Tics; and DBT enhanced Habit Reversal Training (HRT) for body focused repetitive behaviors for Hair Pulling Behaviors/Trichotillomania and Compulsive Skin Picking.  In addition to her work as a staff psychologist in the Center for OCD and Related Disorders (CORD), Dr. Usmani is also the Director for the Adult Intensive Cognitive Behavioral Therapy program in the Department of Psychiatry at Massachusetts General Hospital & Harvard Medical School. She holds a faculty appointment in psychology as an Assistant Professor at Harvard Medical School and has a private practice in the Boston area focusing on CBT for anxiety and related disorders.  Dr. Usmani’s research experiences include providing assessment and protocol-based treatment for studies. She also enjoys supervising clinical psychology graduate and postdoctoral students.  Dr. Usmani completed her postdoctoral fellowships at the Center for Anxiety and Related Disorders (CARD) at Boston University and The Evidence Based Treatment Centers of Seattle (EBTCS), where she gained expertise in evidence-based, cognitive-behavioral therapy, including acceptance and mindfulness based treatments. She received her PhD in Clinical Psychology from Idaho State University, where she focused on cognitive-behavioral treatments. Dr. Usmani speaks English, हिंदी (Hindi), and اُردو (Urdu) fluently.

Publications by Dr. Usmani

Shangyun Zhou, PhD is a staff psychologist at the Center for OCD and Related Disorders (CORD) and an Instructor at Harvard Medical School. He is also a psychologist at Primary Care Psychiatry, Outpatient Treatment Evaluation Services (OTES), and Clinical Trials Network and Institute (CTNI). He completed both his clinical psychology internship and postdoctoral fellowship at Massachusetts General Hospital/Harvard Medical School. He primarily provides CBT for OCD at CORD, while providing intergrative treatments at Primary Care Psychiatry.

Amelia Dev is a pre-doctoral Clinical Psychology intern at Massachusetts General Hospital/Harvard Medical School in the CBT track, and a doctoral candidate in Clinical Psychology at the University of Miami. Her research interests surround judgment and decision making in mood, anxiety, and OC-spectrum conditions, with a focus on testing how biases in predictive processes influence psychopathology. Her dissertation research, which has been funded by the IOCDF Michael A. Jenike Young Investigator Award, examines how people learn from expectancy violation during ERP for OCD.

Geneva Jonathan, Ph.D. is a post-doctoral fellow in psychology at the Center of Digital Mental Health (CDMH) and Center for OCD and Related Disorders (CORD). She completed her undergraduate degree at Wesleyan University, her doctorate degree in clinical psychology at Northwestern University Feinberg School of Medicine, and her clinical internship at Harvard Medical School/Massachusetts General Hospital. Throughout graduate school, Geneva became a practiced clinician in cognitive-behavioral therapy (CBT) through clinical rotations at Advocates Illinois Masonic Medical Center, the Depression and Anxiety Specialty Clinical of Chicago, and Northwestern Memorial Hospital. Geneva’s clinical background is in treating adolescents and adults with severe and chronic mental illnesses. Outside of clinical work, Geneva’s research focuses on the development, evaluation, and implementation of digital mental health interventions for severe mental illnesses as well as understanding the underlying mechanisms for how these interventions effectively prevent, intervene and treat these illnesses.

Lake graduated from Spring Hill College in 2020 with a B.S. in Psychology, Cum Laude. Lake has worked for 5+ years facilitating care for inpatient and outpatient programs by building relationships with patients, parents, and providers to promote a positive, recovery-focused mindset. Lake looks forward to bringing those skills and more to CORD.

Ava Arvand graduated from the University of Virginia (UVA) with highest distinction in 2026, earning a B.S. in Behavioral Neuroscience. At UVA, she worked as a research assistant in the Program for Anxiety, Cognition, and Treatment (PACT) Lab under Dr. Bethany Teachman, where she completed a two-phase qualitative honors thesis exploring youth preferences for digital mental health interventions to support healthier social media use. She has also conducted independent research under Dr. Sarah Kucenas, investigating the role of glial cell function in neurodevelopmental pathways relevant to mental health disorders. Her broad research interests include personalizing and scaling digital mental health interventions and examining their acceptability across different populations. After her time at CORD, Ava intends to pursue a Ph.D. in clinical psychology.

Gienn Leong is a senior at Tufts University, currently pursuing an undergraduate degree in Clinical Psychology and English. Previously, he worked at the Psychopathology, Affective Neuroscience & Decision Making Laboratory at the University of Hong Kong under Professor Frances Jingwen Jin. The research focused on elucidating the mechanisms underlying humans’ threat-related decision-making and the role anxiety may play in these processes. His main interests within the field of clinical psychology are better understanding the experience and challenges of those with internalizing mental health disorders. At CORD, Gienn is excited to continue to build his foundation in the field of mental health and gain invaluable research experience.

Savannah graduated summa cum laude from Vanderbilt University in 2026 with a B.A. in Psychology and Spanish. At Vanderbilt, she worked in the Emotion and Anxiety Research Laboratory under Dr. Bunmi Olatunji and Allie Adamis, M.S., coordinating and running various studies related to anxiety disorders, including social anxiety disorder and spider phobia. She also conducted an independent study in the form of a randomized clinical trial for contamination-related OCD, which investigated the efficacy of a text-message reminder intervention for fading safety behavior use. At CORD, Savannah works under Dr. Ryan Jacoby, coordinating projects that investigate the efficacy of AI-based tools for OCD treatment and how neural activity may inform current mechanistic models of ERP for OCD. She is broadly interested in the various mechanisms underlying OCD and anxiety disorders and hopes to increase the availability of expert-powered mental health tools via novel delivery techniques (e.g., digital). After her time at MGH, Savannah intends to pursue a Ph.D. in clinical psychology.