Timothy David Becker, M.D.

Dr. Bem Atim is an Assistant Attending Psychiatrist and Assistant Professor of Psychiatry at Weill Cornell Medicine. He earned his M.D. from Weill Cornell Medical College. He then completed his psychiatry residency at New York University School of Medicine, where he served as chief resident in his last year, and then subsequently completed a fellowship in child and adolescent psychiatry at the New York University School of Medicine. Dr. Atim then worked as an inpatient attending psychiatrist at NYU Tisch Hospital, on a voluntary-only unit treating patients with acute psychiatric conditions. In 2021, he became the unit chief and medical director of this unit. In addition to his clinical activities, Dr. Atim was an active educator: he joined the undergraduate medical education team as the Associate Clerkship Director of Psychiatry, and earned numerous teaching awards during his tenure at NYU both in resident and medical student education.

Dr. Yesie Yoon, M.D., M.S., DFAACAP, is a triple board-certified physician in Pediatrics, Psychiatry and Child and Adolescent Psychiatry. She is currently an Assistant Professor of Clinical Psychiatry at Weill Cornell Medical College and an attending psychiatrist at the Center for Childhood and Adolescent Behavioral Health at NewYork-Presbyterian Westchester Behavioral Health. A native of South Korea, Dr. Yoon completed her medical degree at Yonsei University College of Medicine and earned a Master of Science in Healthcare Quality and Safety from the University of Alabama at Birmingham. She completed her Pediatrics/Psychiatry/Child and Adolescent Psychiatry training in the highly competitive Triple Board Program at Cincinnati Children’s Hospital Medical Center and the University of Cincinnati.Dr. Yoon brings a unique and integrative lens to child mental health, informed by her cross-disciplinary training and extensive leadership in academic medicine. Her clinical and research interests include integrative psychiatry, pediatric delirium, adolescent depression, relational psychodynamic psychotherapy and improving access to mental health care through quality and safety initiatives. She has served in multiple leadership roles, including Director of Quality Improvement in Psychiatry at Montefiore Medical Center and Director of Child Psychiatry Consultation-Liaison at UAB.As a Distinguished Fellow of the American Academy of Child and Adolescent Psychiatry (AACAP), Dr. Yoon currently co-chairs AACAP’s Asian Caucus and serves on its Diversity & Culture Committee. Fluent in Korean and English, she is passionate about culturally responsive care and reducing mental health disparities among immigrant and Asian-American families. Dr. Yoon is dedicated to empowering families and trainees alike with the knowledge and tools they need to navigate complex mental health systems. Her work integrates clinical excellence with a strong commitment to education, community outreach and systems-level change.

Dr. John Mahlstedt attended Union College where he obtained a bachelor of arts in managerial economics and graduated Summa Cum Laude and was selected for the Phi Beta Kappa honor society. There he earned numerous other honors, including awards for academic excellence and service to the college community. He then went on to earn his Medical Degree from the University of Connecticut School of Medicine, where he earned an award for his research work and earned honors in various clerkships for clinical excellence, including psychiatry. Dr. John Mahlstedt then went on to complete his internship and residency in adult psychiatry at NewYork-Presbyterian / Columbia University Medical Center and served as Chief Resident during his last year of residency. Dr. Mahlstedt then went on to complete fellowship in Child and Adolescent Psychiatry at both of the Cornell and Columbia campuses of NewYork-Presbyterian hospital. During his fellowship, Dr. Mahlstedt earned the Edward J Sachar Award for excellence inclinical care. Dr. Mahlstedt welcomes patients to his practice for diagnostic evaluations, consultations, psychotherapy and medication management.