Paula Wilt, 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. Charles Engel is a board-certified psychiatrist who earned his MD and MPH from the University of Washington in Seattle. He completed his psychiatry residency at Letterman Army Medical Center in San Francisco and a fellowship in psychosomatic medicine at the University of Washington Medical Center. He has held clinical, research, teaching, policy, and administrative roles at Walter Reed Army Medical Center, the Uniformed Services University of the Health Sciences, the Seattle VA Medical Center, and most recently served as Professor of Psychiatry and Behavioral Sciences at the University of Washington School of Medicine.

Dr. Engel specializes in caring for adults affected by stressful or traumatic experiences. He treats posttraumatic stress, depression, anxiety, substance-related concerns, and persistent physical symptoms such as chronic pain, fatigue, and memory and focus. His approach is person-centered and collaborative, focusing on meaningful improvements in symptoms, quality of life, and functioning across important life roles.

Dr. Engel begins with a careful diagnostic evaluation and works with patients to identify the changes that matter most in their lives. Treatment plans are developed collaboratively and may include thoughtful medication management and practical strategies for coping with daily challenges. Follow-up visits focus on supportive conversations, problem-solving, and small, meaningful steps that support recovery and long-term well-being.

Dr. Rachel Sherhart is a board-certified adult psychiatrist who has been in practice for over 4 years. She specializes in medication management with 30-minute follow-up visits. This may be accompanied by elements of supportive therapy, Acceptance and Commitment Therapy (ACT), Dialectical Behavior Therapy (DBT), and psychodynamic therapy. If more in-depth work is needed, she may refer patients to a collaborating psychotherapist. ‍Dr. Sherhart received her medical degree from Texas A&M Health Science Center and completed her psychiatry residency training at the University of Texas Southwestern in Dallas, Texas. She has served as faculty at Texas A&M University College of Medicine, providing education and supervision for psychiatry residents and medical students. ‍She has experience treating adult patients from many walks of life with a broad range of diagnoses, including depression, anxiety, bipolar disorder, ADHD, and trauma-related disorders. Dr. Sherhart has a passion for providing excellent patient care and education. Her goal is for patients to feel heard and find a safe place to discuss their concerns. She is motivated to work collaboratively with patients to find a solution that best fits their treatment goals and improves their overall quality of life.‍

Joel Witherspoon is a licensed Clinical Mental Health Counselor with over 20 years of clinical experience working in various mental health settings, working directly with clients from diverse backgrounds living with a broad range of mental health conditions. Joel earned his Undergraduate degree at California State University Long Beach, Graduate School at East Carolina University, Greenville, NC, and completed his internship in Raleigh, NC. Joel has been practicing for 19 years as a Licensed Clinical Mental Health Counselor, focusing on mood disorders, trauma, situational adjustment disorders, and any life challenge that interferes with a client's happiness. Working with Joel, treatment is specific to the individual with the focus on modalities that are specific to each person's challenges. Joel uses an eclectic approach with a foundation in person-centered therapy, cognitive behavioral therapy, dialectical behavioral therapy, interpersonal therapy, and trauma therapy combined with somatic interventions such as mindfulness.

Dr. Erica Mark is a board-certified psychiatrist with experience in both inpatient and outpatient care. She formerly served as a Staff Psychiatrist at a VA Medical Center, where she specialized in the mental health needs of veterans. Dr. Mark earned her B.S. in Biological Sciences, Summa Cum Laude, from Hampton University, received her MD from the University of Texas Medical Branch, and completed her psychiatry residency at Tulane University School of Medicine, serving as Chief Resident in 2017.

Dr. Mark fosters a warm, supportive environment where patients feel heard and respected. She values open communication and works collaboratively to set clear, personalized treatment goals. Deeply committed to service, she has supported underserved and marginalized communities through various nonprofit initiatives.

During initial sessions, Dr. Mark takes time to understand each patient’s history, concerns, and goals. She then creates individualized treatment plans aligned with each patient's unique needs and preferences. Dr. Mark encourages ongoing dialogue to adapt care plans and support long-term progress.

Background and credentials

Dr. Lisa Ekeanyanwu is a board-eligible psychiatrist who completed her psychiatry residency training at Stanford University. She has gained experience in a wide range of clinical environments, including inpatient and outpatient care, community mental health settings, emergency rooms, telehealth services, and international clinical fieldwork.

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Treatment approach

Dr. Ekeanyanwu’s practice is centered on pharmacotherapy, which she integrates with supportive therapy, cognitive behavioral therapy (CBT), and psychodynamic therapy to provide comprehensive psychiatric care. She takes a collaborative and individualized approach, tailoring treatment to meet each patient’s unique goals and improve their overall quality of life. She has a special interest in cultural and micro-cultural influences on mental health and strives to provide culturally competent care that respects each patient’s life experiences and values. When she believes additional therapy may be beneficial, she may recommend incorporating a therapist into the care team.

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What you can expect in a first visit

During the first visit, patients can expect a thorough evaluation where Dr. Ekeanyanwu carefully assesses their symptoms, medical history, and personal treatment goals. She fosters a collaborative and patient-centered environment, ensuring that each treatment plan aligns with the patient’s individual needs. She provides medication management along with therapeutic support and, when appropriate, may recommend additional therapy to optimize outcomes. Her approach prioritizes safe, effective, and culturally sensitive care that evolves to support patients throughout different stages of their lives.

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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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