Matthew Koller, MD

Dr. Kerstin Asquith is a board-certified psychiatrist at Talkiatry. She has extensive experience working with a wide range of diagnoses and patient populations, with particular interest in treating depression, anxiety, PTSD, and OCD. She also has additional training in college mental health. Dr. Asquith believes in the importance of getting to know each of her patients and the unique issues that bring them into treatment. Her approach involves collaborating with patients to create personalized treatment plans and considering both medication and non-medication methods.

Dr. Asquith is from California and completed her undergraduate studies at the University of California, Davis. She obtained her medical degree from Creighton University School of Medicine and then trained at Stanford University's Adult Psychiatry Residency Program. She subsequently completed a fellowship in student mental health at Stanford University. Most recently, Dr. Asquith worked as an outpatient psychiatrist at The Permanente Medical Group. In her free time, she enjoys traveling, trying new foods, and spending time with friends and family.

Dr. Bryce Toburen is a board-certified psychiatrist dedicated to compassionate, collaborative care across the lifespan. His training includes an MD from the Medical College of Wisconsin, residency at The Ohio State University where he served as Chief Resident, and a fellowship in Child & Adolescent Psychiatry at Nationwide Children's Hospital. Outside the clinic, he enjoys sports, tennis, exploring nature, traveling, and spending time with loved ones.

Each patient brings a unique story, and he strives to create a safe, respectful space where you feel heard and supported. His interest in psychiatry stems from a desire to maximize the well-being of patients and their families through strong therapeutic relationships. Compassion and curiosity guide his work, along with a strong belief in the power of connection and collaboration. You can expect open communication and a focus on your personal goals throughout your time together.

Treatment is personalized using evidence-based approaches that include psychotherapy, medication management, and lifestyle strategies. He specializes in addressing anxiety, depression, ADHD, OCD, and trauma-related concerns. Collaboration and trust are central to his approach, with an emphasis on empowering patients to take an active role in their healing and well-being.

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Dr. Anh Tran completed undergraduate studies, medical school, and psychiatry residency training at Saint Louis University. Following training, Dr. Tran joined the Department of Veterans Affairs, where they provided care in an outpatient setting with both telehealth and in-person services. With this experience, Dr. Tran brings a strong clinical background and a dedication to supporting patients through accessible and personalized psychiatric care.

New patients can expect Dr. Tran to respect their time and autonomy while working together to establish shared treatment goals. Dr. Tran values open candor and punctuality, aiming to create a therapeutic relationship grounded in mutual trust, transparency, and collaboration.

During the first visit, Dr. Tran takes a comprehensive history and background to determine if the therapeutic relationship is the right fit for both patient and provider. Ongoing care typically involves monthly appointments for medication management until stability is achieved, after which visits may shift to quarterly follow-ups. This structured yet flexible approach supports continuity and long-term well-being.

Dr. Ariela Karasov completed her psychiatry residency at Stanford, serving as Chief Resident in her final year, and pursued a fellowship in Neuropsychiatry at Stanford Hospital. She is board certified in Behavioral Neurology and Neuropsychiatry and has worked as a National Expert in bipolar disorder at the VA. She has experience treating Generalized Anxiety Disorder, Obsessive-Compulsive Disorder, Bipolar Disorder, PTSD, and Depression, as well as patients with comorbid neurologic and mental health conditions. Dr. Karasov has also taught residents as adjunct clinical faculty at the University of Wisconsin Hospital and Clinics.

Dr. Karasov takes a collaborative approach, actively engaging patients in treatment planning and decision-making. She incorporates therapy into her practice, emphasizing each individual’s values and what gives their life meaning and purpose. Patients can expect a thoughtful, empathetic, and patient-centered environment where their goals and experiences are prioritized.

She values a thorough evaluation to understand how medical, psychological, and social factors contribute to a patient’s presentation. When appropriate, she invites family members or friends to provide collateral information to ensure a complete understanding, guiding a tailored and effective treatment plan.

Lisa Carroll is a Licensed Clinical Social Worker with 24 years of experience treating everything from adjustment disorders to Depressive Disorders, Anxiety disorders, and trauma, is eager to help others suffering from mental health issues or just adjusting to new circumstances. She has an eclectic approach to care and treatment based on strengths and person-centered care utilizing cognitive behavioral therapy, motivational interviewing, solution focused approaches, Rogerian theory, mindfulness, dialectal behavior therapy, narrative therapy, psychodynamic theory, cognitive processing therapy and many others. She is more eclectic in her approach because people are different and need a style that fits their individual needs. She is always seeking feedback from her clients to improve clinical outcomes. She does what is necessary and required to make this the best treatment anyone can get. She wants everyone she treats to reach their full potential. Lisa was trained as an undergraduate in psychology at the University of Alabama, graduating in 1991. She received her MSW in 1997 from the University of Alabama. She became licensed clinically in 2000. She has extensive experience and training in a variety of modalities and therapeutic interventions.

Dr. Harmeeta Singh was born and raised in St. Louis, MO and is board certified with ABPN (American Board of Psychiatry & Neurology). Dr. Singh has been in practice for 15 years and focuses on an individualized treatment plan, not only using pharmacotherapy when needed, but also implementing insight-oriented, supportive, motivational, and brief psychotherapy. Dr. Singh is a firm believer in combining psychotherapy with medication management when warranted to manage and treat a wide variety of mental health conditions including, but not limited to - Depressive Disorders, Bipolar Disorders, Psychotic Disorders, Anxiety Disorders, Trauma related disorders, Substance use disorders, Personality disorders, Sleep Disorders and Eating Disorders. Her dynamic approach is client focused, involving the client throughout their treatment and care plan, taking careful consideration to the individual's needs and goals. ‍Upon completion of her residency through St. Louis University, St.Louis, Dr. Singh joined her parents' Internal Medicine practice. She learned firsthand that implementing mental health awareness, screening, and education into a primary medically focused practice led to more favorable outcomes. Many mental health conditions can manifest as and/or exacerbate a variety of medical/physical conditions and thereby go undiagnosed and untreated. Dr. Singh has worked closely and coordinated care within the medical field and with other specialists in treating and diagnosing comorbid mental health conditions. While in private practice for over 10 years, she was also an attending and consultant for inpatient mental health care and provided mental health services for residents in various residential care facilities, group homes, and skilled nursing facilities. Over the past 5 years she has consolidated her practice and presently is employed with Compass Health Network in Missouri helping bridge the gap in mental health care by coordinating and providing care to the underserved community.