Jeffrey Niles, DO

Sherra St. Clair is a board-certified Psychiatric Mental Health Nurse Practitioner with over a decade of experience supporting individuals with a wide range of mental health concerns. Her areas of expertise include attention deficit hyperactivity disorder (ADHD), depressive and anxiety disorders, obsessive-compulsive disorder (OCD), bipolar disorder, and trauma-related conditions.

She completed her advanced nursing degree at the University of Wyoming, where she was recognized for her compassionate and welcoming approach to patient care. Before becoming a nurse practitioner, Sherra was inspired to pursue further education while working as part of an inpatient treatment team that included psychiatrists, psychologists, patients, and their families. Witnessing the profound improvements patients experienced after a crisis motivated her to transition toward outpatient and preventative care.

Prior to her nursing career, Sherra worked as a medical illustrator and animator, having studied at the University of Michigan’s medical school. She enjoyed creating educational materials for patients, physicians, and attorneys.

Sherra is passionate about working with individuals of all genders and socioeconomic backgrounds. She uses a collaborative, strengths-based approach that incorporates evidence-based medication management, psychotherapy, and patient education. She believes each person is the expert in their own life and strives to empower individuals to build on their self-worth, progress, and potential.

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Background and credentials

Dr. Tyler Josephs is a staff psychiatrist at Talkiatry. He earned his medical degree from Kansas City University in 2017 and completed his psychiatric residency at the University of Kansas Medical Center in 2021. During his residency, he served as Chief Resident at both the University of Kansas Medical Center and the Kansas City VA Medical Center. Most recently, Dr. Josephs worked at the Kansas City VA Medical Center, where he was the psychiatric director of the outpatient mental health clinic and served as Psychiatry Executive for behavioral health services.

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Treatment approach

Dr. Josephs believes in a holistic approach to mental health treatment, integrating medication management, supportive psychotherapy, and collaboration with therapists and support staff. He tailors treatment to each patient's unique needs, ensuring a comprehensive and individualized approach to care. His expertise includes treating a variety of psychiatric diagnoses, such as depression, anxiety disorders (including OCD), ADHD, and PTSD.

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What you can expect in a first visit

In a first visit, patients can expect a thorough evaluation, where Dr. Josephs takes the time to understand their medical history, symptoms, and treatment goals. He emphasizes open communication and collaborative decision-making, ensuring that patients feel heard and supported. Based on this initial assessment, he will develop a personalized treatment plan, which may include medication management and referrals to therapy or other supportive services as needed.

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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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Dr. Mary O'Malley is board certified in Adult Psychiatry and Sleep Medicine. She received her medical degree from Weill Cornell Medical School and PhD in Neurobiology from The Rockefeller University. She completed her Psychiatry residency and Sleep Medicine Fellowship training at the New York University Medical Center. In her psychiatric practice, Dr. O'Malley uses an integrative approach to health, combining evidence-based concepts in neurobiology with psychological, social and spiritual/existential worldviews to understand and treat every patient. Her primary practice is medication management. She also integrates elements of psychotherapy into her work, typically within 30-minute follow-up visits. In addition to medication and psychotherapy, she incorporates wellness tools into visits, such as mindfulness exercises and sleep management strategies. If she believes that additional psychotherapy is needed, she will recommend that you add a therapist to your care team. Dr. O'Malley has extensive experience working with people from many stages of life, with diverse world views and cultural backgrounds. She has always had an inclusive practice and welcomes people who identify as LBGTQIA+. As part of her own life path she became an Interfaith Minister and enjoys including spirituality and the supportive role it can play in healing for her patients. Her primary focus is working with adults with mood and anxiety disorders, trauma symptoms, ADHD, and problems with sleep. She enjoys working with people facing life transitions, especially older adults and women who are struggling with mental health challenges related to pregnancy and post-partum health. Prior to joining Talkiatry, Dr. O'Malley was working at Hartford Healthcare with adults in intensive outpatient programs and at Hackensack Meridian Health outpatient clinics. She was the medical director of the Consultation Liaison Service at Berkshire Medical Center in Pittsfield, Massachusetts, and an assistant professor at UMass Medical School. She has published and presented widely on topics related to Wellness in Psychiatry, Ethics and Sleep Medicine. She is an advocate for finding your voice in medical decision-making and enjoys using sound healing for relaxation and stress management.

Dr. Mandel received his Bachelor of Arts and Doctor of Medicine degrees from the University of Pennsylvania. He completed his Residency in Psychiatry at Mount Sinai Medical Center in Manhattan. He has been board certified in psychiatry since 2001 and is a Life Fellow of the American Psychiatric Association. He has held numerous clinical and academic appointments including serving as Chairperson of Psychiatry at Huntington Hospital in Huntington, New York, and Assistant Professor of Psychiatry at Hofstra North Shore-LIJ School of Medicine.

Dr. Mandel has over 25 years of clinical experience treating all mental health conditions. He has a strong interest in mood and anxiety disorders, including work-related anxiety. He authored a section on the pharmacology of social anxiety in the book Work Makes Me Nervous. Dr. Mandel also has expertise working with clients diagnosed with borderline personality disorder. He has lectured on the pharmacologic management of this condition, including a presentation at the NIMH International Think Tank for the More Effective Treatment of Borderline Personality Disorder.

Dr. Mandel continually seeks to streamline complex medication regimens. He has completed a fellowship in integrative psychiatry and carefully considers the potential contributions of lifestyle and nutrition to overall mental health and well-being. By taking an eclectic approach, Dr. Mandel is able to achieve the best possible outcome for all whom he is privileged to serve.

Dr. Vitaly Chernish is a board-certified psychiatrist. He earned his medical degree from the University of Tennessee Health Science Center, where he also completed his psychiatry residency training. Following residency, he relocated to New York City and worked at NewYork-Presbyterian Brooklyn Methodist Hospital. He also held an academic appointment as Assistant Professor of Clinical Psychiatry at Weill Cornell Medical College. Dr. Chernish specializes in the treatment of anxiety disorders, depression, bipolar disorder, post-traumatic stress disorder (PTSD), and obsessive-compulsive disorder (OCD).

Dr. Chernish strives to create a therapeutic environment that balances empathy and compassion with structure and clinical clarity. Patients can expect a thoughtful, respectful approach that prioritizes understanding their concerns while providing clear guidance and evidence-based recommendations.

Initial visits involve a comprehensive evaluation of psychiatric, medical, and psychosocial history, current symptoms, and medication use to ensure care is individualized and appropriate. Dr. Chernish emphasizes collaborative, multidisciplinary treatment and regularly coordinates care with primary care physicians, specialists, and therapists when clinically indicated.

Dr. Michael Padua is a graduate from the University of Nevada, Reno School of Medicine and completed his psychiatry residency training at Loyola University Medical Center at Maywood, IL. He is trained and experienced in diagnosing and treating various psychiatric disorders including depression, anxiety, psychosis, and bipolar disorder with a focus on posttraumatic stress disorder, women's mental health, and cultural psychiatry. He combines his clinical expertise with a passion for working with underserved populations and the LGBTQIA+ population to address mental health needs across various communities. Dr. Padua has experience working in a variety of settings, which includes working as an outpatient psychiatrist at a federally qualified health center (FQHC), and as a correctional psychiatrist at the Washoe County Sherriff's Office in Reno, NV. In addition to his clinical work, Dr. Padua has also participated in research and education, and has co-authored peer-reviewed articles in the fields of psychiatry and biology.