Rebecca Farias, MD

Background and credentials

Dr. Matthew Koller is a board-certified adult psychiatrist who completed his undergraduate training at The University of Texas at Austin. He earned his medical degree from The University of Texas Health Science Center at San Antonio and completed his general adult psychiatry residency at Baylor College of Medicine in Houston, TX, where he served as Chief Resident of Education in his final year of training.

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Treatment approach

Dr. Koller believes that understanding a patient fully is essential before treatment begins, emphasizing a collaborative and patient-centered approach to care. His practice is primarily focused on medication management, but he also incorporates supportive therapy and other therapeutic modalities as needed. He may recommend including a therapist in the treatment plan to ensure comprehensive, well-rounded care. He has experience treating a wide range of mental health conditions, including depression, anxiety, insomnia, personality disorders, bipolar disorder, PTSD, and psychotic disorders.

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What you can expect in a first visit

During the first visit, patients can expect a thorough and individualized psychiatric evaluation, where Dr. Koller takes the time to understand their symptoms, history, and treatment goals. He prioritizes open communication and shared decision-making, working closely with patients to develop personalized treatment plans. While medication management is the foundation of his approach, he remains flexible and adaptive, incorporating therapy and other interventions as needed to help patients achieve optimal mental health.

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Why Talkiatry?

We’re a virtual mental health practice that makes it easy to find great care. We combine quality and convenience to help you thrive—faster. Our providers, like this one, are highly trained experts who specialize in medication management and collaborate with you on a treatment plan that fits your needs and comfort level.

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Barbara (Barb) Pack is a Licensed Professional Clinical Counselor with the Supervision Endorsement and a Licensed Independent Chemical Dependency Counselor, Clinical Supervisor Endorsement who has been providing mental health treatment for over 24 years and addiction treatment for over 27 years. Barb utilizes a combination of approaches in working with her clients, including person-centered, cognitive behavioral therapy, motivational interviewing, solution focused techniques, and a variety of other techniques. She has experience in several different types of treatment settings and treatment modalities in both Ohio and Florida. Barb enjoys working with individuals who also have co-occurring disorders, both mental health and substance use. Barb has experience working with a wide range of age groups and mental health issues including but not limited to depression, anxiety, trauma, stress management, grief, relationship issues, and a wide range of substance use issues. She will assess individuals' needs in their first few visits and work with them to develop an individualized treatment plan. Barb works to provide the empathetic listening and emotional support that her clients need to reach their goals. Her dream has been to work herself out of a job, as she wants to help her clients find healing and happiness. Barb attended the University of Akron for graduate school in a Community Counseling Program and attended Malone College, now University, and majored in Psychology.

Dr. Kristin Ratz is a Board-Certified psychiatrist who is an expert in the diagnosis, treatment, and prevention of mental, emotional and behavioral disorders. She specializes in medication management combined with supportive therapy during 30-minute follow-up sessions. Dr. Ratz recognizes that each patient is unique and believes in an environment of collaboration, in which the patient and psychiatrist work together in order to develop the best individualized treatment plan. A California local, Dr. Ratz obtained her undergraduate education at University of California, Davis, graduating magna cum laude with a degree in Human Development. She then attended medical school at Loma Linda University School of Medicine, obtaining her Medical Doctorate. Following this, she completed her adult psychiatry residency training at the distinguished University of California, Irvine. Dr. Ratz has worked in a diverse range of healthcare settings, including county and community clinics, and is very experienced in telepsychiatry. She pays close attention to not only an individual's emotional state, but also their physical, spiritual, and social well-being, in order to provide her patients with exceptional holistic care.

Dr. Tamoria is a California native whose career has taken him around the country. As a medical student at Temple School of Medicine in Philadelphia, PA he worked in a culturally diverse, urban community. He was Chief Resident at the “President’s Hospital” in Washington DC and spent the first part of his career serving as an active-duty Navy psychiatrist helping servicemembers and veterans. After the Navy, he returned west to WA whereas a Medical Director he led one of the state’s most successful behavioral health programs through COVID and into the telehealth revolution. Now he serves as Talkiatry’s first West Coast Chief leading and supporting psychiatrists across the western US.

Dr. Tamoria works with adults to diagnose and treat a wide variety of mental health conditions including Depression, Anxiety, ADHD, Bipolar Disorder, PTSD, and more. He uses a combination of medication management and psychotherapy treatment to help patients improve and thrive. He is well experienced in caring for patients with complex histories or co-morbid medical conditions.

In the first appointment with Dr. Tamoria he completes a comprehensive evaluation of mental health symptoms, medical history, social supports, and stressors. He works collaboratively with patients to develop a treatment plan that may include lab tests, managing medications, initiating psychotherapy, or referring to other specialists. Over time he builds on the patient’s strengths and resilience to lead to recovery.

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Dr. Heather Paxton is a physician with over 20 years of experience in psychiatry. She earned her medical degree from Yale University School of Medicine and completed her internship and residency at Yale New Haven Hospital and affiliated programs. She also earned a fellowship certificate in College Mental Health at Yale University Health Services. Dr. Paxton has extensive experience in outpatient, intensive outpatient, and inpatient settings, treating individuals of all ages and a wide range of psychiatric conditions.

Dr. Paxton values treating each person as an individual and considers it an honor to be trusted with someone’s vulnerability. She strives to understand each patient’s perspective on therapy and medication, honoring their preferences while providing clear education to reduce fear and build trust.

Dr. Paxton reviews written information before visits to focus on meaningful dialogue. She seeks to understand daily life, goals, and desired outcomes, including preferences about therapy, medication, and side effects. She ensures each patient understands and agrees with the plan, emphasizing collaboration.

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.