Diane Lewis, MD

Dr. Jisoo Park is a board-certified psychiatrist. She obtained her bachelor's degree from Tufts University, where she double majored in Biopsychology and Art History. She attended medical school at Nova Southeastern University, and completed her psychiatry residency at Stony Brook University Medical Center. After graduating with her residency, she was appointed clinical assistant professor at Renaissance School of Medicine, where she worked at the Treatment Resistant Depression Clinic. She was involved in teaching medical students and residents, and was part of various research studies and publications. Dr. Park treats a variety of psychiatric disorders in adults, including depression, anxiety, and PTSD. She does not treat patients with ADHD. She emphasizes a patient-centered approach and believes that best treatment outcomes result from a strong therapeutic relationship between a patient and a psychiatrist. She offers medication management and therapy through telehealth sessions. She offers sessions in both English and Korean.

Margaret Ngumi, MSN, APRN, FNP-C, PMHNP-BC, is a dual board-certified Psychiatric Mental Health and Family Nurse Practitioner with over 20 years of experience in healthcare. She began her career as a Family Nurse Practitioner and later pursued a post-master’s certification in psychiatry to address the growing need for accessible mental health services. Margaret has extensive experience in both inpatient and outpatient settings, treating conditions such as depression, anxiety, PTSD, mood disorders, and substance use disorders.

She takes a collaborative, patient-centered approach to care, creating a safe and supportive environment where individuals feel heard and empowered. With a strong emphasis on holistic care, Margaret considers all aspects of a patient’s well-being—including lifestyle, relationships, and overall health. Whether through medication management, therapy, or lifestyle modifications, she is committed to helping patients achieve meaningful and lasting improvements in their mental health.

Margaret begins with a comprehensive psychiatric evaluation to understand each patient’s history, concerns, and goals. She then works closely with them to develop a personalized care plan that may include medication, therapy, and evidence-based lifestyle interventions. She prioritizes open communication, patient education, and ongoing collaboration to ensure treatment remains effective and evolves with each patient’s needs. Through her compassionate and evidence-based approach, Margaret is dedicated to helping individuals find balance and improve their overall quality of life.

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Dr. Jennifer Ruch is a board-certified psychiatrist who strives to understand her patients' lived experiences and aspirations to develop supportive therapeutic relationships through empathetic listening, mutual trust, and respect. She collaboratively creates individualized care plans that align with personal treatment goals in a safe and judgment-free environment. After completing her Bachelor of Science degree in Human Biology with a focus in psychology from the University of California, Merced, she earned her medical degree from Lake Erie College of Osteopathic Medicine. Dr. Ruch completed her General Psychiatry Residency at Arnot Ogden Medical Center in New York. Her clinical experience involves treating individuals of all age groups from diverse populations and socioeconomic backgrounds suffering from anxiety, depression, bipolar disorder, psychotic disorders, neurodevelopmental disorders, and neurocognitive disorders. She has provided care in inpatient and outpatient psychiatric facilities, the Veterans Affairs Medical Center, emergency rooms, state facilities, and an inpatient chemical dependency center. She also performed pre-procedure psychological evaluations for bariatric and spinal cord surgeries, and psychiatric consult liaison services on medical units and has clinical training in inpatient and outpatient neurology. Her clinical experience incorporated treatment modalities such as pharmacotherapy and interventional psychiatry, including Transcranial Magnetic Stimulation and Spravato. Dr. Ruch integrates a wide array of psychotherapy as needed; however, her practice primarily focuses on medication management while utilizing referrals to therapists and providing collaborative care for optimal outcomes.

Dr. Richard Rise has created a successful career as a psychiatrist over the past 30 years. He has participated in a variety of treatment settings and has developed a wealth of experience at both prescribing medications, providing therapy, counseling, and even coaching. He takes an individual approach to treating others, recognizing individuals as unique and worthy of love, respect, and acceptance. He is compassionate, non-judgmental, and truly enjoys helping others. He tends to gravitate towards a combination of medication management (if indicated) and psychotherapy where he treats all facets of the individual. Dr. Rise believes that we are all unique and should be treated as such. He spent most of his career in private practice until deciding to retire in 2014. After this he spent the next 3 1/2 years, reading, studying, traveling, and spending time with his loved ones. In 2018 he was offered a position as a consultant overseeing Ketamine infusion therapy for treating treatment-resistant depression. When the pandemic hit in March of 2020, Dr. Rise was asked to assist a local psychiatric hospital deal with the unique and often deadly consequences of the virus. This proved to be a wonderful opportunity for personal growth and to improve the quality of life of many others. After working at the hospital for the 2 years, Dr. Rise joined Talkiatry to continue providing high-quality psychiatric care to others in a very loving, supportive, creative, and collaborative environment.

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.

Dr. Stuart Hedgpeth is a board-certified psychiatrist. While Dr. Hedgpeth primarily focuses on medication management, he understands that mental health often requires approaches from multiple perspectives. Psychodynamic and supportive therapies are offered on an as-needed basis in addition to medication management. New patients are provided 60 minutes for initial visits, and follow-ups are given 30 minutes. Dr. Hedgpeth graduated from the University of North Carolina School of Medicine in Chapel Hill, NC. He completed his adult psychiatry residency training at Virginia Commonwealth University Health System in Richmond, VA. Dr. Hedgpeth's training has positioned him to care for adults of all ages with a wide spectrum of mental health disorders and related conditions. In his residency he sought out additional experience working with patients undergoing treatment for HIV, patients with trauma-related disorders, and the LGBTQ+ population.