Raafay Deen, DO

Dr. Stephen Geisler is a board-certified adult psychiatrist and has been practicing for over 37 years. His practice focuses on medication management, and typically offers this in conjunction with supportive therapy in 30-minute follow-up visits. If Dr. Geisler feels you would benefit from working with a therapist in conjunction with medication management, he welcomes collaboration with your therapist to make for the best outcome. Dr. Geisler is a graduate of the New York University School of Medicine. He completed a fellowship in Psychoanalytic Psychotherapy at the Zucker Hillside Hospital of Northwell Health after finishing his residency training there. He is currently an Assistant Clinical Professor at the Donald and Barbara Zucker School of Medicine at Hofstra/Northwell. Over the years Dr. Geisler has received a number of awards including NAMI Exemplary Psychiatrist Award, The APA Irma Bland Certificate of Excellence in Teaching Residents, the Zucker Hillside Hospital Department of Psychiatry Recognition Award for Education, and twice received the Outstanding Teacher of the Year Award from the graduating residents' class. Dr. Geisler is a member of the American Psychiatric Association, the Nassau Suffolk District Branch of the APA and the American Society of Clinical Psychopharmacology. Through the years, Dr. Geisler has participated in many clinical research projects, has been the co-author of many papers, and has made many presentations. Dr. Geisler specializes in psychopharmacology, especially tailoring individualized treatment to serve the needs of patients with a variety of conditions. He has a lot of experience in treating patients with depression, bipolar disorder, anxiety disorders, ADHD, and OCD.

Dr. Alejandra Vivas is board-certified in adult psychiatry and board-eligible in child and adolescent psychiatry. She completed her general psychiatry residency at Montefiore Medical Center and a child and adolescent fellowship at Mount Sinai School of Medicine. Dr. Vivas brings extensive experience from outpatient, emergency, and telepsychiatry settings. She has advanced training in CBT, Motivational Interviewing, and Psychodynamic Therapy. Fluent in English and Spanish, she is committed to culturally sensitive, individualized care.

Dr. Vivas fosters a warm, respectful, and professional space where patients feel seen and empowered. She values open communication and builds collaborative relationships to align treatment with each person’s values, goals, and lifestyle. Her approach is integrative and flexible, grounded in evidence-based methods to support lasting, meaningful change.

Dr. Vivas begins with a thorough evaluation to understand each patient’s history and goals. She creates customized treatment plans that may include therapy, medication, or both. Drawing on CBT, Motivational Interviewing, and Psychodynamic Therapy, she adapts care to meet evolving needs, aiming to relieve symptoms, foster resilience, and support long-term well-being.

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Dr. Liss was born and raised in a neighborhood in the North Bronx. He attended Queens College, CUNY where he graduated Summa Cum Laude with a B.A. in Hebrew. He completed Medical school at NYIT College of Osteopathic Medicine in Old Westbury, NY and thereafter was accepted to NUMC for psychiatry residency training. For his final year of residency training Dr. Liss was appointed to the position of Chief Resident for Academics & Research for the Psychiatry residency program at NUMC, Nassau University Medical Center. He received two awards during his residency training, including the Acute Mental Health Services Award and the Ambulatory Mental Health Services Award at the end of his 2nd and 3rd years of residency training, respectively. At NUMC, Dr. Liss underwent a rigorous training in a multitude of psychiatric settings and has experience with managing a wide array of psychiatric areas of treatment including mood/bipolar disorders, ADHD, depression, anxiety, personality disorders, as well as the intersection of medical disorders and psychiatric disorders. For his outpatient practice, Dr. Liss anticipates focusing on mood disorders, anxiety disorders, OCD, personality disorders, and family dynamics .Dr. Liss' practice focuses on a duality of treatment strategies: specifically psychotropic medication management in conjunction with non-pharmacologic treatment modalities including supportive psychotherapy, emotive supportive psychotherapy, as well as personalized variants of psychodynamic/interpersonal psychotherapy. Additionally, Dr. Liss has experience facilitating the coordination of psychosocial treatments in underserved populations.‍

Dr. Jacob T. Kannarkat is an adult psychiatrist. Dr. Kannarkat's practice focuses on medication management. In his visits, he uses an integrative approach, blending an empathic, problem-solving orientation with an understanding that the reasons for an individual's condition can be complex. He has experience dealing with many forms of mental illness and works collaboratively with his patients and their other treatment providers in making a plan for recovery. Dr. Kannarkat completed undergraduate studies at the University of Florida. After receiving his medical degree at the University of Miami Miller School of Medicine, Dr. Kannarkat continued for residency at the University of Miami/Jackson Health System. He ultimately completed his training as Chief of Psychiatric Emergency Services at Yale School of Medicine. Dr. Kannarkat has experience working with adults of all ages who are dealing with depression, anxiety, bipolar disorder, PTSD, substance use disorders, and many other conditions.‍

Dr. Adeola Mustapha is a board-certified psychiatrist with experience across outpatient, inpatient, and community mental health settings. She completed her psychiatry residency at Indiana University School of Medicine – Vincennes in July 2024 after earning her medical degree from Ross University School of Medicine. Recognized for her exceptional psychotherapy skills, Dr. Mustapha received therapy awards in both her PGY3 and PGY4 years. Her background reflects a commitment to blending strong clinical training with compassionate, patient-focused care.

Dr. Mustapha creates a warm, collaborative, and supportive environment where patients feel respected and understood. She believes in the power of psychotherapy combined with evidence-based psychiatric care, always striving to integrate both in treatment. Open communication and clear, realistic goal setting are central to her approach. She is committed to a holistic perspective that considers emotional, physical, cultural, and social well-being. With an emphasis on empowerment, Dr. Mustapha encourages patients to take an active role in their healing journey.

Dr. Mustapha begins with a comprehensive evaluation to learn each patient’s history, concerns, and goals. She develops individualized treatment plans that may integrate therapy modalities such as CBT, DBT, TF-CBT, psychoanalysis, and FETI, along with medication management when appropriate. Using a goal-oriented, step-by-step process, she tracks progress and adapts treatment as needs evolve. Through ongoing dialogue, she ensures patients feel supported, informed, and engaged throughout their care. Her aim is to foster long-term resilience and overall wellness, not just symptom relief.

Dr. Jeffrey Seley is board certified in adult psychiatry. He has been in practice for over 21 years. Dr. Seley's practice focuses on medication management in conjunction with supportive therapy and psychoeducation in 20-30 minute follow-up visits. At times, Dr. Seley may recommend additional therapy and ask that you bring another therapist into your care team to provide the best outcome. Dr. Seley graduated from Cornell University with a B.A. degree in psychology. He received his medical degree from the University of South Florida and completed his residency at New York University and its affiliated hospitals, including Tisch and Lenox Hill, where he served as chief resident. He has worked for over twenty years in private practice and at a large community hospital in Pennsylvania. His extensive hospital experience kept him sharply focused on the connection between medical issues and mental health presentations. Dr. Seley brings to his patients over twenty years of experience in general adult psychiatry treating a wide variety of conditions including depression, anxiety, bipolar disorder, ADHD, addiction, and geriatric issues. His treatment philosophy stresses the importance of being responsive, compassionate, and kind. He sees his work as the enhancement of hope.