Austin Lin, MD

Shelah Radke, MD, JD, is a double board-certified Child and Adolescent and Adult Psychiatrist with over a decade of extensive experience in mental health care, specializing in the well-being of children, adolescents, and young adults. She currently serves in St. Louis, MO, where she is known for her dynamic leadership as a Medical Director and her robust clinical practice. Throughout her career, Dr. Radke has held pivotal roles, including Medical Director of Crisis Psychiatry Services at Mercy Hospital and key positions in several reputable outpatient clinics across the U.S. Her clinical acumen spans a diverse range of settings, from private practice and crisis care to specialized programs in residential and educational institutions.

A staunch advocate for evidence-based approaches, Dr. Radke integrates lifestyle and pharmacological interventions to foster mental health resilience among her patients. She is particularly passionate about the shared decision-making model, which enhances patient empowerment and satisfaction by actively involving them in their treatment plans. Dr. Radke's academic contributions are equally notable. She has developed educational curriculums that significantly improve health outcomes and has shared her expertise through numerous media appearances and professional talks. Her commitment to medical education is reflected in her mentorship of nurse practitioners and her involvement in creating community psychiatry programs.

Complementing her medical expertise, Dr. Radke holds a Juris Doctorate, with a focus on public health and social policy, which enriches her understanding of the legal and systemic aspects of healthcare. Her approach is deeply holistic, informed by her training in integrative medicine and her personal commitment to wellness, which she practices through nutrition, exercise, and travel with her family. Dr. Radke's professional journey is driven by a commitment to optimizing mental health outcomes and enhancing the quality of life for her patients and their families.

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Dr. Jessica Healey is a board-certified adult psychiatrist. She obtained her medical degree from Cooper Medical School of Rowan University and completed her residency training in psychiatry at the University of Miami Miller School of Medicine and Jackson Memorial Hospital. During her training, Dr. Healey gained extensive experience providing psychiatric care to various patient populations in multiple patient care settings, including in the outpatient clinic, inpatient unit, and emergency department. Following her training, Dr. Healey worked as an outpatient psychiatrist for the Veterans Health Administration. During her tenure with the VA, she worked closely with staff psychologists, social workers and nurses to provide multidisciplinary, collaborative care to the veteran population suffering from a variety of mental health conditions.

Dr. Healey has experience and interest in treating adults suffering from trauma-related disorders and anxiety disorders but provides treatment for a variety of psychiatric conditions including depression, bipolar disorder, and obsessive-compulsive disorder.

Dr. Healey focuses on medication management and supportive psychotherapy, but has training in utilizing various therapy modalities, including cognitive behavioral therapy, interpersonal therapy, and psychodynamic psychotherapy. When appropriate, Dr. Healey will refer for more extensive psychotherapy and/or collaborate with your established psychotherapist for comprehensive care.

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Xavier Diao, MD (he/him) is a board-certified psychiatrist. He earned his undergraduate degrees in Psychology and Biological Sciences at the University of Maryland, where he also obtained his medical degree. Dr. Diao completed his psychiatry residency at the Icahn School of Medicine at Mount Sinai, received additional training in child and adolescent psychiatry at Columbia and Cornell, and finished a psychoanalytic fellowship at the New York Psychoanalytic Society & Institute. Prior to joining Talkiatry, he was an Assistant Professor of Clinical Psychiatry at the University of Pennsylvania, where he provided clinical care and teaching along the undergraduate-graduate medical education continuum.

Dr. Diao's therapeutic orientation is informed by psychodynamic, cognitive behavioral, and dialectical behavior modalities. He has expertise in the treatment of a diverse range of mental health conditions, including depression, anxiety, OCD, and PTSD. Dr. Diao uses a developmentally informed and LGBTQ-affirmative approach in his practice, with the aim of enriching meaning and alleviating suffering in the domains of work, play, and love.

Dr. Diao begins each encounter with gentle curiosity, inviting patients to share their stories without fear of judgment. Together, he crafts an individualized treatment plan with the patient that may include medication, psychotherapy, and/or referrals to subspecialty care, always in close collaboration with other members on the treatment team.

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Dr. Caitlin Meyer is a board-certified in adult psychiatry with experience in a wide variety of psychiatric disorders including depression, anxiety, women's mental health, and ADHD. Dr. Meyer's practice is focused on medication management with supportive therapy offered in 30-minute follow-up visits. Dr. Meyer received her medical degree from the University of Texas Southwestern Medical Center in Dallas, Texas, where she received the North Texas Society of Psychiatric Physicians' Award for outstanding medical student in Psychiatry. She pursued her residency in adult psychiatry at Brown University in Providence, Rhode Island, with particular interest and training in child, adolescent, and young adult Psychiatry. After completing training, Dr. Meyer worked with children and adults in a variety of treatment settings including Community Mental Health Centers and hospitals, providing inpatient, residential and outpatient services. Prior to joining the Talkiatry team, Dr. Meyer participated in psychiatric research developing new treatment methods for complex psychiatric disorders. Dr. Meyer enjoys treating patients across the lifespan from young adulthood through senior care. She sees each patient as a unique individual and works together with her patients to develop a treatment plan specific to their needs and goals.

Dr. Hussain is known for his compassionate, thoughtful approach to psychiatry and his commitment to helping patients feel genuinely seen and supported. He takes pride in getting to know each person as a whole—beyond just symptoms or diagnoses—and works to build on that from the very first session. Originally from New York, Dr. Hussain completed his undergraduate studies at the University of Buffalo, earned his medical degree from St. George’s University, and completed residency training at Northwell Health in New York and Connecticut.

Dr. Hussain treats a wide range of mental health conditions including depression, anxiety, ADHD, PTSD, OCD, bipolar and psychotic disorders. His approach is collaborative and patient-centered, with a strong focus on shared decision-making. Treatment often includes medication management and therapy techniques like cognitive behavioral therapy and motivational interviewing. Sessions are always a judgment-free space where patients feel safe, respected, and empowered.

During an initial visit, Dr. Hussain conducts a thoughtful and collaborative assessment focused on understanding a patient’s symptoms, experiences, and treatment goals. From there, he works closely with each person to develop a personalized plan, including medication options and other therapeutic strategies. His goal is to create a safe, respectful space where patients feel heard, empowered, and supported throughout their care.

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Background  and credentials    

Dr. Christa DeFries is a board-certified Adult Psychiatrist. She earned her  medical degree from UT Southwestern Medical School in Dallas, Texas, and  completed her residency in Adult Psychiatry at Baylor Scott & White in  Temple, Texas. Following residency, Dr. DeFries gained additional experience  treating homeless and formerly homeless populations in New York City,  particularly focusing on individuals with histories of trauma and substance  addiction, prior to joining Talkiatry.    

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Treatment approach    

Dr. DeFries practices Adult Psychiatry, employing an integrative treatment  approach combining medication management, psychotherapeutic methods, and  lifestyle modifications. She recognizes that each patient benefits from a  personalized mix of these three aspects of care. Dr. DeFries specializes in  treating diverse psychiatric conditions, including those related to trauma,  substance addictions, and various mental health disorders.    

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What you can expect in a first visit    

In a first visit with Dr. DeFries, patients can expect a comprehensive  evaluation aimed at understanding their individual mental health history,  specific concerns, and overall treatment goals. Dr. DeFries emphasizes an  individualized approach, carefully exploring the best combination of  medication, therapy, and lifestyle adjustments tailored specifically to each  patient's needs. Patients can anticipate an empathetic and collaborative  environment focused on their personal experiences and goals.    

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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.