Matthew Hamilton, MD

Amanda Sager is a Licensed Professional Counselor (LPC) with experience working in group practice settings and Post-Traumatic Stress retreat environments. She works with individuals who have experienced trauma and significant life stressors. Amanda earned a master’s degree in Counseling from Concordia University Irvine, as well as an additional master’s degree in Coaching and Athletic Administration.

Amanda is a compassionate and dedicated therapist who specializes in helping individuals navigate profound life challenges, build resilience, and move toward meaningful healing. She provides a safe, non-judgmental space where patients can process pain, reconnect with inner strengths, and reclaim their personal narratives. Her therapeutic approach is integrative, collaborative, and trauma-informed, with an emphasis on creating a strong, trusting relationship where patients feel truly seen and understood.

Amanda begins treatment by developing a thorough understanding of each patient’s history, concerns, and goals during the initial session. From there, she works collaboratively with patients to create individualized treatment plans that align with their personal goals and support sustainable growth and healing.

Dr. Angela Durham is a licensed psychiatrist with over 15 years of experience providing compassionate care in both outpatient and telehealth settings. She has a strong background in treating a wide range of mental health conditions, including mood disorders, anxiety disorders, and ADHD. Dr. Durham earned her medical degree from the University of Louisville and completed her psychiatry residency at the University of Kentucky. She maintains an active medical license and DEA registration.

Dr. Durham creates a supportive, nonjudgmental environment where patients feel comfortable sharing their experiences. She values collaboration and open communication throughout the treatment process, focusing on empowering individuals with education and tools to better manage their mental health. Her approach emphasizes tailoring care to each person’s unique needs and goals to promote long-term wellness.

Dr. Durham begins each therapeutic relationship with a thorough assessment of the patient’s history, symptoms, and goals. She works collaboratively to develop an individualized treatment plan that may include medication management, lifestyle strategies, and coordination with therapists or other healthcare providers. Dr. Durham regularly reviews progress, adjusts treatment plans as needed, and encourages patients to take an active role in their care and decision-making.

Dr. Adele Veksman is double board-certified in adult psychiatry and psychosomatic medicine, with over 14 years of experience diagnosing and treating a wide range of psychiatric conditions. She approaches each patient as a unique individual, offering a non-judgmental space to help patients develop into their best selves. She focuses primarily on medication management to alleviate symptoms while working with patients on behavioral changes to address underlying issues. If additional therapy is needed, she may suggest adding a therapist to your care team to provide the best outcome. Dr. Veksman received her medical degree from St. George's University and then completed a residency in psychiatry and fellowship in psychosomatic medicine at Zucker Hillside Hospital at Northwell Health. Next, she was an attending and ER psychiatrist at North Shore University Hospital providing psychiatric care to medically ill patients. She then transitioned to adult outpatient care at Maimonides Medical Center, treating various psychiatric illnesses. Throughout her career, she taught and supervised residents and medical students.

Dr. Kira Posteraro is double board-certified in Adult and Addiction Psychiatry and has over 10 years of clinical experience. She completed her General Adult Psychiatry Residency at Allegheny General Hospital in Pittsburgh, PA, followed by a fellowship in Addiction Psychiatry at Beth Israel Medical Center in New York, NY.

Dr. Posteraro’s career has included serving as Director of Psychiatric Services at an addiction treatment center in Pittsburgh, PA, where she provided care across the full continuum of substance use disorder treatment—including residential, acute PHP, IOP, outpatient, and aftercare services. She later held the role of Section Chief Psychiatrist for the Center for Treatment of Addictive Disorders at VA Pittsburgh Healthcare System, offering both residential and outpatient services and acting as Medical Director for the SAMHSA-certified Opioid Treatment Program. Most recently, she served as Chief of Psychiatry for the Behavioral Health Service Line at VA Pittsburgh, where she had the honor of caring for our nation’s Veterans.

While her clinical expertise centers on the diagnosis and treatment of substance use disorders, Dr. Posteraro also has extensive experience treating a wide range of psychiatric conditions, including depressive and bipolar spectrum disorders, anxiety disorders, and trauma-related disorders.

Dr. Posteraro uses a collaborative, supportive approach to care, incorporating motivational interviewing to help guide patients on their journey to wellness. She integrates holistic strategies alongside medication management and is dedicated to meeting patients where they are in treatment to build individualized, effective recovery plans.

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Dr. Tetyana Tarnavsky is a board-certified psychiatrist trained in Adult Psychiatry. She attended Dnipropetrovsk State Medical Academy in Ukraine where she received her M.D., M.S. and Ph.D. degrees in Psychiatry. Dr. Tarnavsky completed her residency at Harvard South Shore Psychiatry Residency Training Program in MA, where she was elected chief resident. Dr. Tarnavsky has an extensive research experience in Ukraine and the USA. She had studied computer addiction for her dissertation; had multiple abstracts and presentations; published several articles in peer-reviewed psychiatric journals as well as a book entitled Computer Addiction: Formation, Diagnosis, Correction and Prophylaxis. She has helped organize international conferences with the goal of improving access to and quality of healthcare in Dnipropetrovsk, Ukraine, and providing a national model for health care reform. Dr. Tarnavsky has worked with a variety of patients with diverse backgrounds in a Community Health Center and in the Partial Hospitalization Program as well as supervised medical students, psychiatry residents, and nurse practitioners. She has been a lecturer on psychiatry at Harvard Medical School and was involved in the training of psychiatry residents in the Harvard South Shore Psychiatry Training Program. Her primary focus has been on treating adults with depression, anxiety, post traumatic stress disorder, adjustment disorder, ADHD and other disorders. Dr. Tarnavsky strives to provide quality and compassionate treatment to individuals and their families.‍

Dr. Tsujimoto-Ryzewski is a board-certified adult psychiatrist. She received her medical degree from the University of Nevada, Reno School of Medicine. She completed her residency at the University of Nevada, Reno School of Medicine, where she served as a chief resident during her last year of training. Dr. Tsujimoto-Ryzewski has treated patients with a wide variety of diagnoses both during her residency and after her training while working at a busy private practice clinic as well as for the Veterans Administration. Dr Tsujimoto-Ryzewski focuses on medication management and supportive psychotherapy. If she feels that additional therapy is needed, she will ask that you bring in a therapist as part of the treatment team. Dr. Tsujimoto-Ryzewski will work collaboratively with you in a caring environment to assist you in reaching your goals.