Richard McColl, MD

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. Sabrina Ghim is a board-certified physician specializing in adult psychiatry and practices adult psychiatric medication management. She focuses on building a strong therapeutic and collaborative environment with patients. She works with individuals struggling with depression, ADHD, obsessive compulsive disorder, anxiety disorders, including generalized anxiety, and social anxiety. Dr. Ghim usually meets with patients monthly for psychiatric follow up appointments. She provides psychiatric medication management in a comprehensive manner, paying careful attention to each patient's unique biological, psychological, and cultural make-up. She is diligent about keeping up-to-date on the research and expanding frontiers of psychiatry and psychopharmacology. She strongly believes in tailoring treatment in an integrative and collaborative manner to provide the best outcome for each unique patient. In some instances, Dr. Ghim may recommend the addition of a separate therapist in order to help facilitate the best care possible. Dr. Ghim experienced various cultures growing up in different countries and environments, shaping her open-minded demeanor and views, and eventually her interest in the human mind and psychiatry. She earned her bachelor's degree in Molecular Biology with honors, and a Doctor of Medicine (M.D.) degree from the University of Central Florida College of Medicine. She completed her Adult Psychiatric Internship and Residency training in New York City, at the Mount Sinai Morningside and West Hospitals, where she treated a diverse patient population with psychiatric illnesses in emergency, inpatient, and outpatient settings. Dr. Ghim is currently licensed in and seeing patients located in the states of New York, Florida, and Texas for medication management.

Dr. Ariela Karasov completed her psychiatry residency at Stanford, serving as Chief Resident in her final year, and pursued a fellowship in Neuropsychiatry at Stanford Hospital. She is board certified in Behavioral Neurology and Neuropsychiatry and has worked as a National Expert in bipolar disorder at the VA. She has experience treating Generalized Anxiety Disorder, Obsessive-Compulsive Disorder, Bipolar Disorder, PTSD, and Depression, as well as patients with comorbid neurologic and mental health conditions. Dr. Karasov has also taught residents as adjunct clinical faculty at the University of Wisconsin Hospital and Clinics.

Dr. Karasov takes a collaborative approach, actively engaging patients in treatment planning and decision-making. She incorporates therapy into her practice, emphasizing each individual’s values and what gives their life meaning and purpose. Patients can expect a thoughtful, empathetic, and patient-centered environment where their goals and experiences are prioritized.

She values a thorough evaluation to understand how medical, psychological, and social factors contribute to a patient’s presentation. When appropriate, she invites family members or friends to provide collateral information to ensure a complete understanding, guiding a tailored and effective treatment plan.

Dr. Cabrera is a board‐certified psychiatrist with several years of experience working with an ethnically and culturally diverse population in outpatient, inpatient, and psychiatric emergency room settings. Most recently, Dr. Cabrera practiced privately treating adults with a wide range of mental illnesses both in person and via telepsychiatry. Prior to this, she was an attending psychiatrist in the outpatient department and in the Comprehensive Psychiatric Evaluation Center at Mount Sinai Beth Israel where she also served as Associate Training Director of Psychiatric Residency Training. Dr. Cabrera has a strong background in psychopharmacology and supportive and psychodynamic psychotherapy.

Dr. Dalhy is a psychiatrist with a practical, patient-centered approach to care. She earned her Associate of Arts Degree in General Studies from Valencia College, followed by a Bachelor of Science in Biomedical Sciences from the University of Central Florida. She completed a post-baccalaureate program in Health Sciences before earning her Doctor of Osteopathic Medicine from Lake Erie College of Osteopathic Medicine (LECOM). She went on to complete four years of psychiatry residency training at Centerstone Behavioral Health Hospital and Addiction Center in Bradenton, Florida.

Dr. Dalhy has inpatient and outpatient practice experience. She is experienced in treating a wide range of conditions, including complex mood disorders, anxiety disorders, addiction medicine, primary psychotic disorders, and patients in acute crisis.

Her treatment style is straightforward and conservative. She focuses on making accurate diagnoses and creating treatment plans that are as simple and effective as possible—prioritizing the lowest effective dose and minimizing unnecessary medications. She works collaboratively with each patient to develop a treatment plan that is realistic, personalized, and sustainable. She incorporates education into her practice and believes that patients make more informed decisions when they understand their options. You can expect a straightforward and honest approach with no judgment or pressure. She always welcomes questions.

Outside of her clinical work, she values spending time with loved ones, including pets. Dr. Dalhy enjoys spending time outdoors and experiencing new adventures. She values honesty, kindness, and compassion, and she integrates those qualities into her personal life and her work with patients.

Dr. Thomas O’Brien holds a Bachelor of Science degree from the University of Wisconsin–Madison and earned his medical degree from Midwestern University Chicago College of Osteopathic Medicine. He completed his psychiatry residency at Loyola University Medical Center. Dr. O’Brien has experience practicing across outpatient, PHP, IOP, and inpatient settings.

He strives to create a supportive environment where patients feel heard, respected, and understood. His approach emphasizes a holistic, whole-person method to healing, guided by the patient’s own goals and values. Dr. O’Brien integrates psychotherapy with medication management, drawing on his background in psychodynamic psychopharmacology and acceptance and commitment therapy.

Dr. O’Brien focuses on understanding each patient as a whole to create individualized treatment plans. This begins with a comprehensive history during the initial session to identify biopsychosocial factors. Treatment is then tailored to align with the patient’s unique goals and values, promoting meaningful progress.