Marc Whaley, MD

Dr. Corey Greenwald is a board-certified psychiatrist with years of experience treating patients in both acute inpatient psychiatric emergencies and outpatient medication and psychotherapy settings. He earned his medical degree from Brown University, completed his internship in the Columbia system, and pursued residency training at Mount Sinai Medical Center in New York City. Dr. Greenwald has practiced in academic, urban, suburban, and rural environments, which has given him broad perspective and adaptability in caring for diverse patient populations.

Dr. Greenwald emphasizes psychoeducation as a core part of care, ensuring patients are active participants in understanding and managing their mental health. He brings a deep interest in transcultural issues and in how social media and news cycles impact emotional well-being. Having witnessed the effects of mental illness within his own family, Dr. Greenwald approaches his work with empathy, insight, and a strong commitment to helping patients feel supported throughout their journey.

Dr. Greenwald works collaboratively with patients to define or clarify concrete treatment goals by the end of the initial appointment. He maintains a low threshold for revisiting and adjusting treatment plans if progress feels unsatisfactory, ensuring care remains flexible and effective. His informal, eclectic interpersonal style allows him to tailor his approach to each individual, fostering trust and partnership in the therapeutic process.

Dr. Michael Petetit has worked with people from many different walks of life in clinics, hospitals, and online, providing evidence-based treatments for a wide range of mental health conditions. His professional journey is unique—he began his career as a research chemist, later earned a Master’s degree in psychology and worked with children, before pursuing his medical degree and completing a psychiatry residency.

Dr. Petetit approaches treatment as a true collaboration. He partners with patients to clarify goals and create individualized treatment plans that reflect their priorities and values. He strives to be non-judgmental, direct, and honest in his style, building a therapeutic relationship that supports open communication and trust.

Dr. Petetit begins with a thorough evaluation to understand each patient’s circumstances and challenges. From there, he works with patients to set and prioritize goals, review treatment options, and select a plan that feels both comfortable and practical. As treatment progresses, he regularly revisits and refines the plan, ensuring it remains effective and aligned with the patient’s evolving needs.

Dr. Osaji is an Adult Psychiatrist who completed her psychiatry training at Texas Tech University Health Sciences Center, Lubbock, Texas. She served her program as a chief resident, which helped to build her leadership and interpersonal skills. She also dedicated herself to leading her resident team and fostering a supportive learning environment. She received the award of excellence in psychiatry knowledge during her residency training. She also has a Master's in Public Health from Texas Tech University Health Sciences Center and is a Phi Kappa Phi Honor Society member.

Dr. Osaji is an adult outpatient psychiatrist who provides care via telehealth. She strives to create a supportive, collaborative space where patients can explore what's bringing them in and work together to determine the best path forward. Whether someone is new to mental health care or returning after some time away, Dr. Osaji recognizes that it's normal to feel a mix of emotions at the start. She takes a thoughtful, personalized approach to treatment that may include medication, therapy recommendations, or simply creating space to talk. While telehealth offers flexibility and convenience, Dr. Osaji is committed to building a meaningful connection with each patient. She does not provide emergency services between sessions but ensures patients can access the appropriate resources when needed. As someone early in her career, Dr. Osaji brings fresh training and a strong commitment to transparency, lifelong learning, and evidence-informed care. She values open communication and believes deeply in each person's capacity for meaningful change.

Dr. Osaji creates a supportive, collaborative space to help patients explore their mental health concerns and goals. She takes a personalized approach that may include medication, therapy referrals, or check-ins, always valuing patient input. Follow-up visits are 20 to 30 minutes, focusing on monitoring progress and adjusting care as needed. She offers convenient access through telehealth while building meaningful, transparent relationships rooted in respect and growth. Dr. Osaji also values collaborative care and often coordinates with therapists or refers patients to therapy when additional support can enhance outcomes.

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Dr. Yaejin Park is a board-certified adult psychiatrist at Talkiatry. She received her medical degree from the University of Illinois at Chicago School of Medicine and completed her psychiatry residency training at Mount Sinai Morningside West.

Dr. Park has professional interests in treating a wide range of psychiatric conditions including depression, anxiety, PTSD, and eating disorders.  She strives to provide compassionate and holistic care with the integration of supportive psychotherapy and medication management.

Dr. Stephanie Jarvie is a board-certified psychiatrist and has been practicing for over eight years. Stephanie completed her Bachelor's degree at the University of Bristol in her native United Kingdom. She attended Saint George's University school of medicine in Grenada and completed her residency training in psychiatry at New York Medical College Metropolitan Hospital in NYC, New York. As chief resident, Dr. Jarvie learned to balance her clinical experience with organizational duties and scholarly activities. She has played a crucial role, both clinically, and has been a part of multi-disciplinary treatment teams. More recently, she has been an inpatient clinical psychiatrist at Banner University medical center in Arizona and has served as an assistant professor of psychiatry at the University of Arizona for four years. Stephanie is from Edinburgh, Scotland. Her studies and training have taken her on a journey from the United Kingdom and the Caribbean to New York City and Arizona. She uses her exposure to diverse patient populations from around the world to help with her clinical skills and treatment plans. Dr. Jarvie has a wealth of knowledge and experience in treating a diverse range of psychiatric disorders such as major depression disorder, anxiety, bipolar spectrum disorder, and post-traumatic stress disorders. Dr. Jarvie's practice focuses on medication management. She offers this in conjunction with supportive therapy in 30-minute follow-up. She works collaboratively with patients to develop individualized treatment plans to help them achieve their goal, which may include medication management, lifestyle interventions, and stress reduction techniques. Dr. Jarvie believes that additional therapy may be necessary and asks that you bring a therapist into your care team to provide the best outcome.

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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