Our Clinicians

Ron Green, MD

Ron Green, MD is a Board Certified Psychiatrist and an expert in pharmacotherapy and in neuropsychiatry. He is a Professor of Psychiatry at the Geisel School of Medicine at Dartmouth and a long-time member of its faculty.

Dr. Green is a graduate of the University of Vermont College of Medicine, did his residency in psychiatry at Dartmouth, then served as a psychiatrist in the US Navy for two years. He has been at Dartmouth since then, first as director of the Psychiatry Consultation/Liaison Service at the VA Medical Center in White River Junction, Vermont, then for 25 years, as the Residency Program Director at Dartmouth. For the past three years he has assisted the new Program Director in her transition to the post and has been part-time staff psychiatrist at Hanover Psychiatry. As of July 1, 2013 he will be at Hanover Psychiatry full-time.

In Ron's long career, he has authored many scholarly works and his professional reach has gone far beyond the environs of Dartmouth. One example is his text, co-authored with Dr. Robyn Ostrander, and published in 2009 by WW Norton, "Neuroanatomy for Students of Behavioral Disorders". As well he has garnered many local, regional and national teaching awards, including the 2013 American Psychiatric Association's annual "Irma Bland Excellence in Residency Teaching Award". On the light side, Dr. Green for six years was medical consultant to HBO's "The Sopranos". He prescribed Tony Soprano's medication (for the show's script and not for Mr. Gandolfini of course) and helped design psychotherapy scenes between Mr. Soprano and Dr. Melfi.

Dr. Green is known as a doctor's doctor. His stature, experience and guidance graces not just Hanover Psychiatry but the entire department of psychiatry at Dartmouth.

Matthew Duncan, MD

Matthew Duncan, MD, is an honors graduate of the Geisel School of Medicine, did his internship at Brown University, and completed his psychiatry training at the Harvard Longwood Psychiatry Residency Training Program in Boston. Since training, he has worked as Acting Director of Psychiatry at the Indian Health Service in Fort Defiance, Arizona and in private practice in a group setting with primary care and specialty physicians in his home state of Utah. He has moved back East to join the Geisel School of Medicine Psychiatry Department faculty where he provides clinical care and teaching, including leading the medical student teaching for the Department. At Hanover Psychiatry he serves as a diagnostician and psychopharmacologist.

Robert M. Roth, Ph.D.

Robert M. Roth, Ph.D. is an Associate Professor of Psychiatry at the Geisel School of Medicine at Dartmouth, Director of Neuropsychology and the Adult ADHD Program at Hanover Psychiatry, and Director of Adult Neuropsychological Services at Dartmouth-Hitchcock Medical Center. His pre-doctoral training in neuropsychology took place at the Montreal Neurological Institute and Yale University School of Medicine, and he completed post-doctoral training in neuropsychology and neuroimaging at the Geisel School of Medicine at Dartmouth.

Dr. Roth provides neuropsychological assessments for a wide variety of clientele ages 16 and older who are experiencing cognitive problems such as memory loss, word finding difficulty, inattention or distractibility, or executive dysfunction (e.g., impulsivity, disorganization, poor decision making or problems solving). The Adult ADHD Program team provides detailed psychological and neuropsychological assessments for adults with suspected or previously diagnosed ADHD. Dr. Roth is committed to understanding the person as a whole, considering cognitive, emotional, personality, social, and other factors that can impact on a client's ability to function at their maximal potential.

Dr. Roth is also a neuroscientist conducting neuropsychological and brain imaging research into a number of disorders including ADHD, schizophrenia, OCD, and substance abuse. His research is especially concerned with the role of executive functions in the etiology and treatment of such conditions. He has authored over 70 peer-reviewed scientific publications, as well as being the co-author of two published instruments for the assessment of executive functions (The Behavior Rating Inventory of Executive Function – Adult version, and the Tasks of Executive Control).

Susan P. Stevens, Psy.D.

Susan P. Stevens, Psy.D., is an Assistant Professor of Psychiatry at the Geisel School of Medicine. Dr. Stevens completed her pre-doctoral training at the Veterans Hospital in White River Junction VT, and a postdoctoral fellowship at the Geisel School of Medicine and the National Center for Posttraumatic Stress Disorder (NCPTSD).

Before joining Hanover Psychiatry, Dr. Stevens was a staff psychologist at the White River Junction VA and the National Center for Posttraumatic Stress Disorder (NCPTSD). She taught and supervised psychology interns, postdoctoral fellows and psychiatric residents in treatments of PTSD. Her clinical specialty is the use of cognitive-behavioral techniques to treat depression, anxiety, PTSD, and relationship distress.

Dr. Stevens' clinical and research focus has been on cognitive-behavioral treatments, couples therapy, and resiliency, and she has published numerous manuscripts in these areas. She was a consultant for a cognitive behavioral couple's therapy study funded by the National Institutes of Mental Health, and was a research associate for The National Consortium for the Study of Terrorism and Responses to Terrorism (START), a Department of Homeland Security Center of Excellence grant focusing on mental health, community resilience, and the terrorist threat. She also has an interest in friendship and mindfulness and their potential benefits for overall wellbeing.

Dr. Stevens has had a life-long interest in mindfulness and meditation and was first introduced to formal meditative practices in 1984 while studying in India. She has integrated mindfulness and psychotherapy for many years in her clinical practice, and most recently has been trained as a teacher of the Mindfulness-Based Stress Reduction (MBSR) program developed by Jon Kabat-Zinn at the University of Massachusetts Medical School. She has completed the eight-week practicum in MBSR and the eight- day Teacher Development Intensive in MBSR at the Center for Mindfulness in Medicine, Health Care, and Society at the University of Massachusetts Medical School. She also teaches Mindfulness-Based Cognitive Therapy for Depression (MBCT).

Bill J. Hudenko, Ph.D.

Bill Hudenko, Ph.D., is an assistant professor of psychiatry at the Geisel School of Medicine. He earned his doctorate in Clinical Psychology from Vanderbilt University and he completed both his internship and a post-doctoral fellowship in child psychology at Dartmouth-Hitchcock Medical Center. In recent years, Dr. Hudenko was an assistant professor of psychology at Ithaca College and a visiting assistant professor at Cornell University. While in Ithaca he taught clinical psychology courses, conducted research on autism-spectrum disorders, and maintained a small private practice. Dr. Hudenko has a broad background in treating child and adolescent psychopathology, with a special emphasis on disruptive behavior disorders, depression and anxiety disorders, autism-spectrum disorders, and childhood trauma. Dr. Hudenko also provides family therapy services and couples counseling.  Dr. Hudenko's research has been published in journals such as Psychological Science, the Journal of Autism and Developmental Disorders, and the journal Autism.  His work has also been highlighted by MSNBC, US News and World Report, LiveScience, Dartmouth Medicine, and the Valley News. 

Gladys Frankel, Ph.D.

Gladys Frankel, Ph.D. is an Assistant Professor of Psychiatry at the Geisel School of Medicine. She recently joined Hanover Psychiatry from Weill Cornell Medical College, where she was an Assistant Professor of Psychiatry, and an Attending Psychologist at New York Presbyterian Hospital. Dr. Frankel has extensive expertise in the evaluation and treatment of eating disorders. At New York Presbyterian Hospital, she worked on the nationally known Eating Disorders Program. She has treated females and males from age 10 through the lifespan who are struggling with various eating disorders including Anorexia Nervosa, Bulimia Nervosa , Binge Eating Disorder as well as patients with medical complications from diabetes, bariatric surgeries, etc. She conducted groups in Cognitive Behavioral Therapy and Dialectical Behavior Therapy. She taught and supervised medical students, residents and fellows. She conducts research on Bulimia Nervosa and developed an instrument to identify sub-types of bulimia. Dr. Frankel's expertise was often requested for consultations throughout the hospital and for workshops for professional and community audiences. She has served as a resource for journalists and is quoted in WEBMD.

Prior to joining NYPH, Dr. Frankel was Assistant Director of the Post-Traumatic Stress Disorder Unit at the Franklin Delano Roosevelt Veterans Administration Hospital in Montrose, NY.

Dr. Frankel was awarded a National Institute of Mental Health Fellowship for her doctoral training at Columbia University. Her clinical training included an internship at New York University's Bellevue Hospital, a Fellowship in Clinical Psychology at New York Hospital and a Certificate of Psychoanalysis at the Westchester Center for the Study of Psychoanalysis and Psychotherapy.

Currently, Dr. Frankel treats individuals, couples and families with cognitive behavioral and psychodynamic therapies. She is interested in working in a collaborative team approach with primary care providers and specialists to provide the most comprehensive care. Dr. Frankel is available for consultations, lectures and workshops.

Paul Holtzheimer, MD

Paul Holtzheimer, MD, is Associate Professor of Psychiatry and Surgery and Director of the Mood Disorders Service at the Geisel School of Medicine and Dartmouth-Hitchcock Medical Center (DHMC) in Lebanon, New Hampshire. Dr. Holtzheimer provides evaluation and management of patients with treatment-resistant mood disorders, especially treatment-resistant depression (TRD). Evaluation will focus primarily on psychopharmacologic recommendations, but will also address appropriateness for psychotherapy, electroconvulsive therapy (ECT) and other interventions (such as transcranial magnetic stimulation [TMS], vagus nerve stimulation [VNS], and cranial electrotherapy [CES]).

Dr. Holtzheimer attended Pacific Lutheran University where he graduated summa cum laude with a B.S. in Biology and B.A. in Philosophy and Psychology. He then attended the Geisel School of Medicine from 1995 to 1999, graduating with honors. He completed his psychiatry residency at the University of Washington School of Medicine in 2003 followed by a clinical research fellowship in transcranial magnetic stimulation from 2003 to 2004. From 2004-2011, he was Assistant Professor of Psychiatry and Behavioral Sciences at the Emory University School of Medicine. Dr. Holtzheimer is an author on over 70 publications in psychiatry, neurosurgery and neuroimaging. He has also been an investigator on multiple treatment and/or imaging studies involving patients with mood disorders. In addition to providing evaluation of patients with mood disorders, Dr. Holtzheimer runs an active clinical research program in mood disorders at DHMC.

Burl Daviss, MD

Burl Daviss, MD, is an Associate Professor of Psychiatry at the Geisel School of Medicine.  Dr. Daviss is a child and adolescent psychiatrist who specializes in the pharmacological treatment of ADHD and mood disorders in youth and young adults.  He is the former medical director of the Center for Children and Families at the University of Pittsburgh, and he is a member of the American Academy of Child and Adolescent Psychiatry.  Dr. Daviss has been referenced in several journals including the Journal of the American Academy of Child and Adolescent Psychiatry and the Journal of Child and Adolescent Psychopharmacology.  He has also received a career development award from the National Institute of Mental Health to develop research expertise in the assessment and treatment of ADHD and comorbid mood disorders in youth. 

Carolyn Solzhenitsyn, M.D.

Carolyn Solzhenitsyn, MD is the Medical Director and Clinical Director at Hanover Psychiatry. A faculty member in the Department of Psychiatry at the Geisel School of Medicine at Dartmouth, she specializes in psychopharmacology and in Cognitive Behavior Therapy.

Dr. Solzhenitsyn is a graduate of the University of Pennsylvania School of Medicine, and completed her psychiatry residency at the Hospital of the University of Pennsylvania. While at Penn, she received her training in Cognitive Behavior Therapy from Aaron T. Beck, MD (the founder of Cognitive Therapy) and Judith S. Beck, PhD.

Prior to joining Hanover Psychiatry, Dr. Solzhenitsyn had a private practice in New York City.

Keri Height, Ph.D.

Dr. Height is a licensed clinical psychologist in the states of New Hampshire and Connecticut and Assistant Professor in the Department of Psychiatry at Dartmouth College. She also holds a position of Adjunct Assistant Professor at Yale University, Department of Psychiatry, allowing her to collaborate with colleagues at the Yale Stress Center, a cutting edge interdisciplinary clinical and research center where Dr. Height previously served as clinical director.

Dr. Height believes in the interconnectedness of the mind and the body and that treatment should be geared toward helping the whole person improve health and wellbeing. Dr. Height specializes in working with adolescents and adults who are having difficulty coping with stress and may be experiencing symptoms of anxiety, racing heart, obsessive thinking, interpersonal conflict, low mood, concentration and attention problems, emotional dysregulation, and sleep problems. She has expertise in working with individuals experiencing medical symptoms or conditions that may be exacerbated by stress, including tension headaches and migraines, chronic pain, gastrointestinal distress, hypertension, metabolic syndrome, obesity, overeating and substance misuse. Furthermore, Dr. Height has extensive experience working with individuals with chronic mental illness, as well as adolescents and adults with developmental disabilities, including autism spectrum disorders.

Dr. Height has completed extensive training in Mindfulness Based Stress Reduction (MBSR) at the UMASS Center for Mindfulness and has taught MBSR and other therapeutic lifestyle interventions for several years, including relaxation techniques, breathing exercises, and biofeedback. She describes her therapy approach as collaborative and integrative, drawing on empirically validated approaches, including Cognitive Behavioral Treatment (CBT), Dialectical Behavioral Therapy (DBT), motivational approaches, interpersonal, psychodynamic, and mindfulness based approaches. Her interpersonal style is a combination of compassionate, accepting, and warm, and yet direct and goal oriented. She is available for individual therapy, group therapy, family therapy, and diagnostic, cognitive, and personality assessment. She also provides group and individual mindfulness based therapy.

Mark McGovern, Ph.D.

Dr. Mark McGovern is a highly experienced and expert clinical psychologist who specializes in the treatment of high achieving individuals who struggle with alcohol and drugs, and/or symptoms of anxiety and depression. Dr. McGovern's clinical training was at Northwestern University Medical School in Chicago (IL) in the mid-1980s, where he was asked to join the faculty of the Department of Psychiatry, and later served as the director of outpatient addiction services at Northwestern Memorial Hospital. He had private clinical and consulting practices in Chicago and Lake Forest (IL), during which time he served as a treating clinician for the National Football League Substance Abuse Program and state impaired physicians programs, and specialized in the evaluation and treatment of high profile and high accountability professionals. In 2001, Dr. McGovern joined the Department of Psychiatry at Dartmouth Medical School, and was named the first director of the Dartmouth Center of Addiction, Recovery and Education. He received a career development award from the National Institute on Drug Abuse and later conducted clinical trials of therapies for co-occurring addiction, PTSD, mood and anxiety disorders. He has authored numerous scientific journal articles and several books on treatment of substance use and mental health problems, and since 2009 has been the Editor-In-Chief of the Journal of Substance Abuse Treatment. Dr. McGovern is widely regarded as a national expert on the assessment and treatment of adult behavioral health conditions. He joined Hanover Psychiatry in July of 2015.

Sara Vargo, M.S.W., LICSW

Sara Vargo, MSW, LICSW is a Licensed Clinical Social worker and an Instructor in Psychiatry at the Geisel School of Medicine. Sara has worked in the community mental health since 2005 and has been a member of the Department of Psychiatry since 2012. While receiving her graduate degree from Smith School for Social Work, Sara completed clinical internships at both the Veteran's Administration Hospital in White River Junction, VT and at the Brattleboro Retreat in Brattleboro, VT.   

Sara specializes in children and adolescents, ages 4 through 18, and their families. Based on extensive experience working with depression, anxiety, disruptive disorders, and childhood trauma, Sara seeks to understand each client's environment from a child-centered perspective. She is experienced in using psychotherapy techniques, Cognitive Behavioral Therapy, play therapy, motivational interviewing, mindfulness, and attachment-based approaches to fit her clients' individual needs. Given her whole-person approach, Sara believes that client caregivers are an integral part of treatment, and therefore welcomes Caregivers to participate in treatment. It helps to deepen the caregiver's understanding of the child's perspective, deepen the child's understanding of the caregiver's perspective, and allows for collaboration on identifying creative solutions to reduce problematic symptoms and strengthen the family.

No matter her client's age, Sara creates a safe and supportive environment and encourages clients to utilize various methods to nurture expression of thoughts and feelings. Whether through play, art, writing or talking, Sara believes that therapy is not something that defines us, but rather something that grows us.

Fallon Cluxton-Keller, M.A., Ph.D.

Fallon Cluxton-Keller, M.A., Ph.D., is a doctoral-trained Licensed Marriage and Family Therapist and an Assistant Professor of Psychiatry at the Dartmouth Geisel School of Medicine. She has extensive experience in working with couples and families with a variety of relational issues (e.g., boundary and communication difficulties, parenting and co-parenting issues, trust issues, infidelity, grief, cross-cultural conflicts, intergenerational conflict, etc.) and mental health problems (e.g., depression, anxiety, etc.) that can interfere with relational health. She adheres to evidence-based practice guidelines in her work with clients, and is an American Association for Marriage and Family Therapy Clinical Fellow.

Dr. Cluxton-Keller's expertise extends beyond providing couple and family therapy services for clients, to research and teaching. She has authored peer-reviewed journal articles and textbook chapters for beginning couple and family therapists. She also continues to hold her faculty teaching positions in the Johns Hopkins University School of Education Department of Counseling and Human Development, and the Johns Hopkins School of Medicine Department of Pediatrics. 

Gillian Sowden, M.D.

Gillian Sowden, MD, is a licensed psychiatrist and Assistant Professor of Psychiatry at the Geisel School of Medicine.  Dr. Sowden’s clinical interests include adult psychopharmacology for mood, anxiety, personality, eating and trauma related disorders, substance abuse and women’s mental health.  She also has expertise in providing psychodynamic and dialectical-behavioral therapy.

Dr. Sowden has special interest in medical student education and previously taught medical students at Harvard Medical School.  Currently she is supervising and teaching psychiatry residents at Dartmouth-Hitchcock Medical Center. Research interests have included collaborative care for patients with depression and heart disease, and simulation training for psychiatry residents. 

Dr. Sowden graduated from Williams College, summa cum laude, with a BA in Biology & Biochemistry.  She graduated magna cum laude from the Harvard Medical School and did her residency in Adult Psychiatry at Cambridge Health Alliance, a Harvard Medical School affiliate.