The Pisgah Institute, P.A. • 158 Zillicoa Street, Asheville, NC 28801 • Phone (828) 254-9494 • Fax (828) 250-0890

Our Clinicians

Bill Barley, Ph.D.


Dr. Barley is a clinical psychologist with 35 years of experience using several cognitive-behavioral therapies to diagnose and treat anxiety and panic disorders, phobias, mood disorders, and obsessive-compulsive spectrum disorders (e.g., trichotillomania).  He is past president and current newsletter editor of the North Carolina Psychological Association and twice past president of the Western North Carolina Psychology Association.  He is a 1980 graduate of Texas Tech University’s clinical psychology program.  Dr. Barley has several professional publications and has made many presentations to professional audiences in his area of practice.

Stephen E. Buie, M.D., D.F.A.P.A.


Dr. Buie attended UNC-Chapel Hill as an undergraduate on a Morehead Scholarship. He obtained his medical education at UNC-Chapel Hill School of Medicine.  He completed a residency in internal medicine at a Columbia University training hospital in New York and a psychiatry residency at Cornell Medical College, also in New York.  He is a Distinguished Fellow of the American Psychiatric Association in recognition of his contributions in several areas of psychiatry.  He is past President of the North Carolina Psychiatric Association.  He is adjunct assistant professor of psychiatry at the University of North Carolina School of Medicine and teaches UNC medical students at the UNC School of Medicine Asheville campus.  Dr. Buie provides medication management for all psychiatric conditions with particular interests in bipolar disorder, ADHD, depression, and anxiety disorders.  He is also trained in TMS Therapy.

Jeff Carter, M.D.

Child Psychiatrist

Dr. Carter treats children and adolescents with a comprehensive approach that includes medications, psychotherapy, and involvement with families.  He provides consultation to the Asheville City Schools.  Dr. Carter earned his doctorate degree at University of Alabama, Birmingham, Medical School, where he also completed his residency in general psychiatry and a fellowship in child psychiatry.  Dr. Carter is also trained in TMS Therapy.

Mary Berg, M.D.


Dr. Berg obtained her undergraduate degree at Duke University and attended East Carolina University School of Medicine for medical school and psychiatry residency.  She has been practicing general adult psychiatry and geriatric psychiatry at The Pisgah Institute since 1999.  Her clinical interests include evaluation and medication  management of a broad range of adult and geriatric mental disorders, including mood disorders, anxiety disorders, eating disorders, dementia, and psychotic disorders.  Dr. Berg is also trained in TMS Therapy.

Susan Hill, Ed.D.


Dr. Hill received her doctorate in counseling psychology from Rutgers University.  She works with children 5 years and older, adolescents, adults, and families.  Her areas of interest include individual and/or family therapy as well as psycho-educational testing, personality testing, and evaluating adaptive/developmental levels.  Over the years, Dr. Hill has worked with persons with Developmental Disabilities, issues surrounding abuse, family conflict, mood disorders, and other personal issues.

Sarah Wells, M.D.


Dr. Wells completed her undergraduate work in psychology at UNC-Chapel Hill on a Morehead Scholarship.  After graduating, she did medical volunteer work abroad and then worked with an Americorps Program before beginning medical school at the UNC School of Medicine.  Dr. Wells completed a general psychiatry residency and a child and adolescent psychiatry fellowship at UNC Hospitals.  She enjoys providing medication management and psychotherapy for children, adolescents, and adults.

Nancy McKeel, Ph.D.


Dr. McKeel specializes in cognitive-behavioral therapy for depression, women’s issues, and post-traumatic stress.  Dr. McKeel is trained in neurofeedback and treats a variety of disorders with it.  Dr. McKeel earned her Masters of Science in Psychiatric-Mental Health Nursing at the University of Virginia and went on to earn her doctorate degree at Georgia State University.

Doug McKee, Psy.D.


Dr. McKee attended Rollins College, Sydney University, West Georgia College, and Georgia School of Professional Psychology.  He specializes in relationship issues between family members, couples, and blended families.  He is a licensed addiction specialist and see adults, children, teens, couples, and families.  Dr. McKee is trained in cognitive behavioral therapy and has presented at many conferences.  He is past President of the Western North Carolina Psychological Association and is a member of the American Psychological Association.  He has taught graduate classes at several universities.  Dr. McKee is creative in his approach to helping his clients develop new patterns to help them succeed in achieving their goals.  Clients are appreciative of the individual attention he gives to their needs.

Danielle Mitchener, M.S.N, A.N.P., P.M.H.N.P.

Psychiatric Mental Health Nurse Practitioner

Mrs. Mitchener completed her bachelor’s and master’s degrees in nursing from the University of North Carolina at Chapel Hill.  She worked for six years at Duke University Medical Center in neurology critical care and as a research coordinator.  As a board certified Adult Nurse Practitioner, Mrs. Mitchener joined The Pisgah Institute in 2008 and enjoys working with patients who experience depression, anxiety disorders, bipolar disorder, attention deficit hyperactivity disorder, and brain injury.

Elizabeth Rollins, M.D.


Dr. Rollins earned her medical doctorate from the University of Arkansas for Medical Sciences and went on to do her general residency training at the University of North Carolina, Chapel Hill.  Dr. Rollins provides medication management for all psychiatric conditions with particular interests in bipolar disorder, ADHD, depression, and anxiety disorders.  

Brian Sealy, M.S.N., F.N.P., P.M.H.N.P.

Nurse Practitioner

Mr. Sealy completed his bachelor's degree in nursing at the University of North Carolina at Chapel Hill, School of Nursing, and went on to complete his Master's of Science in Nursing at Duke University, School of Nursing with training as a family nurse practitioner.  He has also completed post-graduate training at the University of North Carolina at Chapel Hill as a psychiatric mental health nurse practitioner.  He is interested in the relationship between spirituality and mental health and treats a wide range of psychiatric conditions.  Before commencing a career in healthcare, Mr. Sealy worked for many years in information technology as a programmer, administrator, and consultant.

Rita Christensen, Ph.D.


Dr. Christensen received a Doctor of Philosophy in Clinical Psychology from Florida State University. In her undergraduate work, also at Florida State, she majored in psychology and minored in sociology. Her studies in both psychology and sociology reflect her awareness of the impact of a person's environment on their behavior, and the importance of taking context into consideration in the treatment of psychological matters.
Dr. Christensen provides psychological assessment, diagnosis, and treatment to adults for a wide range of mental health problems, including but not limited to depression, anxiety, trauma, relationship issues, phobias, and addictions.  She combines cognitive-behavioral interventions with a humanistic, experiential emphasis in order to reduce symptoms, improve daily functioning, and maximize personal potential.

Adam Hutchins, P.M.H.N.P.

Psychiatric Mental Health Nurse Practitioner

Adam Hutchins completed his BSN at Winston-Salem State University and his MSN in psychiatric nursing at the University of South Alabama. Since 2001, he has worked in a variety of roles in the Asheville area with individuals who have mental health and substance abuse disorders before coming to The Pisgah Institute in 2015 as a Psychiatric/Mental Health Nurse Practitioner. He currently sees patients at multiple sites; in addition to seeing individuals in the outpatient setting at The Pisgah Institute, he sees adults for inpatient crisis stabilization at Neil Dobbins Center, adults and adolescents at Tapestry’s residential and partial-hospitalization eating disorder programs, and adolescent patients with neurodevelopmental disorders at Black Mountain Academy. Mr. Hutchins works with patients of all ages with an array of psychiatric disorders. Areas of particular interest include substance use disorders, neurodevelopmental disorders, post-traumatic stress disorder, personality disorders, psychotic disorders, obsessive-compulsive disorder, and eating disorders.  

John C. Donkervoet, Ph.D.


John received his doctoral degree in clinical psychology from the University of Rhode Island in 1994 with an internship at the Medical University of South Carolina.  His professional education and training was heavily grounded in strong clinical practice work with children, adolescents, and adults.  John began his career working with families utilizing the Multi-Systemic Therapy model.  He was recruited to Hawaii in 1996 to serve as the Clinical Director for the Hawaii Child and Adolescent Mental Health Division. Subsequently, he became a Director of Psychology and Clinical Therapies at a private psychiatric facility on the island of Oahu. During this time, John provided treatment to youth with delinquency issues and their families, geriatric populations, individuals with substance abuse issues, as well as a variety of inpatient psychiatric child, adolescent, adult, and forensic populations. John has had a thriving private practice in Hawaii for the past nine years.  Although new to Western North Carolina, John brings 25 years of experience working with adolescents, adults and families with complex challenges.  His practice currently specializes in work with individuals with personality disorders as part of a comprehensive Dialectic Behavior Therapy (DBT) program. John returned to the mainland (how islanders refer to the United States) from Hawaii to be closer to family, realizing his long term goal of living in the mountains so he can hike, bike, and canoe as often as possible.

Adena Altschul, Ph.D.


Dr. Adena Altschul received her Ph.D. in clinical psychology from the University of Virginia’s Curry Programs in Clinical and School Psychology.  She has over 10 years of experience treating diagnostically complicated adolescents and adults in a variety of treatment settings.  She adopts a strengths based, whole-body approach to mental health treatment and believes that the mind and body have an amazing capacity to heal with the right support and guidance.  She has extensive experience working with adolescents and adults with significant trauma histories who have also struggled with addictions, self-harming behaviors, depression, and dissociation.  Dr. Altschul combines psychoeducation, mindfulness training, creative and narrative therapies to support adolescents, adults, and couples struggling with depression, anxiety, trauma, addictive behaviors, communication and codependency issues.

Dorcas Miller, Ph.D.



Dr Miller attended Indiana University and received her doctorate degree from North Carolina State University. She recently retired from 30 years with the Department of Public Safety providing and coordinating mental health services for incarcerated females. She has also worked in private practice providing psychological assessment and treatment to older adolescents and adults. Dr Miller has specialities in treating individuals with issues of substance abuse, medical needs and disabilities, transition to end of life, LGBTQ clients and their families, and trauma. She has served as a mental health Red Cross volunteer and has provided critical incident debriefing to first responders, and to correctional custody and medical personnel. Dr Miller uses cognitive behavioral interventions and believes that individuals cope best with having physical, mental and spiritual strategies to balance their lives.

Keith Cox, Ph.D.


Dr. Cox received his doctorate in clinical and personality psychology from Northwestern University.  He works with adults on mood disorders, anxiety disorders, chronic pain, and trauma related injuries.  He also works with couples on relationship distress and dysfunction. He uses a broad range of approaches including behavioral therapy, congitive-behavioral therapy, mindfulness-based therapy, values-based therapy, and emotion-focused therapy.  He is an active researcher and publishes and presents on multiple topics including personality and posttraumatic stress disorder.  He is also a professor at a nearby university.