Samuel Russell, MD

Dr. Kotadia is a board-certified psychiatrist who completed his psychiatry residency training program at Nassau University Medical Center in Long Island, NY. After completing training, he has been practicing outpatient psychiatry and specializes in the evaluation and management of major psychiatric disorders, including depression, and anxiety. He uniquely combines his education, training, and practical experiences into specialized treatment plans. Typically, he offers this in conjunction with supportive or emotionally focused therapy in 30-minute follow-up visits. However, occasionally Dr. Kotadia may believe that additional therapy is also needed and ask that you bring a therapist into your care team to provide the best outcome. A story that Dr. Kotadia came across years back still inspires him each day. A man was taking a morning walk at the beach. He saw that along with the morning tide, came hundreds of starfish. When the tide receded, the starfish were left behind and would die in the morning sun. While the tide was fresh, and the starfish were alive, the man took a few steps, picked one up and threw it into the water and continued throwing starfish back into the ocean. Behind him was a stranger who couldn't understand what this man was doing. He caught up with him and asked, "What are you doing? There are hundreds of starfish. How many can you help? What difference does it make?” The man did not reply, rather he took two more steps, picked up another one, threw it into the water, and said, "It makes a difference to this one.”With this story as his motivation and ultimate objective, it has always been Dr. Kotadia's goal, with each patient, to provide superior services.

Dr. Wilbur is a Double Board Certified Psychiatrist in Adult and Addiction Psychiatry. He completed his undergraduate degree in Public Health Studies at Johns Hopkins University and his medical education at the UMass Chan Medical School. Dr. Wilbur completed his psychiatry residency training and addiction psychiatry fellowship training at Yale School of Medicine. His practice focuses on medication management, typically offered in conjunction with supportive therapy in 30-minute follow-up visits. Dr. Wilbur has an interest in treating patients with a wide range of psychiatric conditions including but not limited to depression, anxiety, obsessive compulsive disorder, trauma- and stressor-related disorders, and bipolar disorders. He also has experience treating psychiatric conditions in patients experiencing co-occurring medical illness. Dr. Wilbur believes that successful treatment begins with mutual trust between a patient and their doctor. He uses a warm, nonjudgmental, and collaborative approach. His assessments consider the biological, psychological, and social, and cultural factors that impact mental health. He implements a range of evidence-based treatments to alleviate psychiatric symptoms and improve wellbeing.

Dr. Benita Dieperink, MD, is board-certified in psychiatry by the American Board of Psychiatry and Neurology. She earned her medical degree from the University of Minnesota Medical School and completed residency at the University of Colorado Health Sciences Center. She has extensive experience in private practice, academic leadership, and faculty roles, with expertise in treating diverse adult populations. She specializes in perinatal and reproductive psychiatry, supporting patients through pregnancy, postpartum, PMS, infertility, and perimenopause/menopause, as well as mood, anxiety, trauma-related, and obsessive-compulsive disorders.

Dr. Dieperink values open communication and a collaborative approach, creating a warm, supportive environment where patients feel heard and respected. She integrates psychopharmacology and psychotherapy to help patients work toward clear treatment goals, while fostering a growth- and strengths-based perspective. She also draws on a wide range of interests—from medical science to psychology and history—to enrich patient education.

Dr. Dieperink begins by thoroughly understanding each patient’s history, concerns, and goals. She develops individualized treatment plans aligned with these goals and regularly reassesses progress to refine strategies as needed, ensuring care is responsive, personalized, and effective.

Dr. John Lundeen earned his medical degree from the Medical College of Georgia and completed his psychiatry residency at TriStar Centennial Medical Center. He has worked with adults of all ages in both outpatient and inpatient settings, bringing a wide range of experience to his practice.

Dr. Lundeen approaches every patient with respect, empathy, and a genuine desire to understand their unique experience. He recognizes that seeking treatment can be intimidating and strives to create a welcoming, non-judgmental environment where patients feel safe and heard.

Dr. Lundeen believes in a collaborative treatment process, prioritizing each patient’s goals, values, and input. He emphasizes mental health education as a core component of care, empowering patients to better understand their treatment options and take an active role in their well-being.

Dr. George Han is an adult psychiatrist who earned his undergraduate degree in Materials Science and NanoEngineering from Rice University, his medical degree from the University of Texas Southwestern Medical Center, and completed his psychiatry residency training at the University of Mississippi Medical Center. Now based in New York City, Dr. Han brings a broad geographic and cultural perspective, having previously lived in China, Canada, Illinois, California, Texas, and Mississippi.  

Drawing on these diverse experiences, Dr. Han is committed to providing culturally responsive and identity-affirming care, with a particular focus on immigrant communities, LGBTQIA+ individuals, and high-performance professionals. He uses a collaborative, narrative-informed approach that centers each patient’s lived experience and values. His integrative method helps individuals recognize emotional and behavioral patterns shaped by cultural, relational, and systemic factors.  

In clinical practice, Dr. Han combines evidence-based medication management with appropriate psychotherapy techniques and elements of executive coaching. This comprehensive approach supports patients navigating high-pressure environments, helping them achieve greater clarity, resilience, and confidence across both personal and professional domains

Dr. Macdonnell is a double-boarded psychiatrist with over 25 years of experience in adult psychiatry and geriatric psychiatry. Dr. Macdonnell focuses on treating individuals with medication management. Supportive and interpersonal therapy is incorporated as needed. When additional therapy or longer sessions are necessary to enhance the individual's treatment, she invites a therapist to become a member of your care team. Dr. Macdonnell attended undergraduate school at Manhattan School of Music earning a bachelor's and master's degree in violin performance and musicology. She then attended the City University of New York � Hunter College campus majoring in premedical sciences. Dr. Macdonnell attended Albert Einstein College of Medicine in the Bronx, New York, earning a degree in MD. She completed an internship in internal medicine before entering psychiatry residency at New York-Presbyterian Hospital � Westchester Division. After completing her residency, she stayed for an additional year, completing a fellowship in geriatric psychiatry. She was promoted to Attending Psychiatrist and Unit Chief of the Geriatric Partial Hospital Program. After two years in academic psychiatry, she entered private practice in New York and Connecticut for 8 years. She then served 2 years in the National Health Service providing outpatient care to an underserved area in central Florida. Moving to Georgia, she has worked in private practice and academic psychiatry at Mercer University College of Medicine before moving on to Veterans' care at Atlanta VA and Carl Vinson VA Medical Center. While Dr. Macdonnell has a wide range of experience, she focuses on general adult psychiatry.