Felicitas Koster, DO

Ashley Sharp is a Licensed Professional Counselor with Mental Health Service Provider
designation, who has experience working in multiple settings within the mental health
field including private practice counseling, school-based counseling, and in a behavioral
health hospital. This has allowed Ashley to work closely with individuals of various
demographics and a wide spectrum of mental health conditions. Ashley obtained her
undergraduate degree in psychology from Bryan College in Dayton, TN, and graduate
degree in clinical mental health counseling from Richmont Graduate University in
Chattanooga, TN.

Ashley has been working in the mental health field for 4 years and
focuses on mood and anxiety disorders, as well as personality disorders,
challenges in relationship dynamics, and difficult life transitions such as grief and
divorce. Ashley tailors her treatment modalities for the greatest benefit of the individual,
being considerate of the background and needs of each client.
Ashley uses an eclectic approach to therapy founded in Cognitive Behavioral Therapy
and incorporates elements of Dialectical Behavior Therapy such as mindfulness,
distress tolerance, and emotional regulation.

Dr. Upton Thomas is a board-certified psychiatrist who takes a warm, collaborative, and evidence-based approach to care. With a focus on treating mood disorders, anxiety, OCD, and substance use, he integrates psychopharmacology and psychotherapy to support patients in achieving meaningful change. He brings curiosity, creativity, and a deep respect for each individual’s story to his clinical work.

Patients often find Dr. Thomas easy to talk to and appreciate his calm, thoughtful demeanor. He emphasizes shared decision-making and believes that treatment works best when the patient’s values and voice are at the center. Dr. Thomas aims to create a safe space for honest dialogue and ongoing reflection as treatment evolves.

Dr. Thomas begins with a comprehensive evaluation to understand each patient’s mental health history, current concerns, and goals. He then develops an individualized treatment plan that may include medication, therapy, or both. He prefers to use the lowest effective dose of medications and often integrates psychotherapeutic strategies such as CBT, DBT, or insight-oriented work into his sessions.

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Dr. Whitehouse is a board-certified adult psychiatrist with a strong background in neuroscience and psychopharmacology who has been in practice for over 25 years. At the heart of Dr. Whitehouse's clinical approach is a strong emphasis on establishing trust, building a therapeutic relationship to help patients achieve their goals, and helping people better understand their brain, its strengths, and vulnerabilities and how to use assessment and training to maximize everyone's unique emotional and cognitive capacity. Dr. Whitehouse's practice focuses on medication management. Typically, he offers this in conjunction with supportive or emotionally focused therapy in 30-minute follow-up visits. Occasionally Dr Whitehouse may believe that additional therapy is also needed and ask that you bring a therapist into your care team to provide the best outcome. He received his medical degree from Dartmouth Medical School and went on to complete his residency in psychiatry at MGH in Boston. After completing training, Dr. Whitehouse has worked in every setting from a Community Mental Health Center in rural VT, a General Hospital Department of Psychiatry in Waterbury CT, and a private psychiatric hospital in Massachusetts He has held academic clinical appointments at Dartmouth, Yale and Harvard and provided supervision to medical students, residents, APRNs, Social Workers and Mental Health Clinicians. In addition to his direct clinical work, he has extensive experience with value-based care having worked with the behavioral divisions of CIGNA Behavioral Health, Optum Behavioral Health and MCG. He also has been involved in the latest approaches made possible in mental health by the growth of direct-to-consumer services as part of digital transformation. He believes that every patient is unique and every situation different. He seeks to bring a wealth of experience to bear but, above all, to do so with a personalized and compassionate focus on what will help everyone specifically, practically, effectively, and efficiently. He is especially happy to help people new to emotional help understand the value of different approaches.

Dr. Allison Holt is an experienced, board-certified child, adolescent, and adult psychiatrist who has worked in mental health care in a variety of settings, including health care administration, academia, inpatient psychiatry, private practice outpatient care, forensic and disability evaluations, correctional psychiatry, eating disorder care, and ECT. Dr. Holt is dedicated to providing patients with a relaxed, trusting environment that encourages dialogue and instills the freedom to pursue healing and growth. With empathy, patience and an approachable style, she helps patients see their future with fresh eyes � and develop a plan that will accomplish their goals for change. While medical expertise forms the foundation of Dr. Holt's treatment, her warmth and a sense of compassion are often key motivating factors for patient change and success. Dr. Holt treats a wide variety of needs and illnesses in children, adolescents, and adults, including depressive disorders, bipolar disorders, anxiety disorders, substance-related and addictive disorders, attention disorders, trauma related disorders, and obsessive-compulsive disorders. Through a patient-centered mix of evidence-based treatments, including medication, psychotherapy, and patient education, she helps her patients understand their options and create appropriate treatment plans that empower them to move toward positive change. Dr. Holt received her medical degree from Ohio State University. She completed a General Psychiatry Residency Program (with extra emphasis in addiction and forensic psychiatry), and a Child and Adolescent Psychiatry Fellowship, at the University of Minnesota. Prior to joining Talkiatry, Dr. Holt was the Physician Chief of the Mental Health and Addiction Service Line at M Health Fairview, the largest provider of mental health care in Minnesota. At the same time she was the Vice Chair of Clinical Affairs at the University of Minnesota Department of Psychiatry. Dr. Holt has been awarded "Top Doctor" by Minneapolis-St. Paul Magazine every year from 2014 to 2022. She was president of the Minnesota Psychiatric Society 2020-2021, and was also the co-editor of the Minnesota Psychiatric Society's newsletter, Ideas of Reference, from 2010-2019.

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Justin Jones is a board-certified adult psychiatrist based in Las Vegas, NV. Originally a Mississippi native, he completed undergraduate studies at the University of Mississippi. He subsequently completed medical school and post-graduate residency training at the University of Mississippi Medical Center. His practice focuses on making progress towards therapeutic goals by utilizing a specifically tailored combination of medication management and psychotherapy depending on any given individual's needs. He understands how difficult it can be to begin seeing a new psychiatrist, and does his best to create a safe, welcoming environment that patients can feel comfortable in.