Laurence Dopkin, MD

Dr. Tiffany Abtahi is board certified in adult psychiatry and has been in practice for over 6 years. She completed her residency at Icahn School of Medicine, Elmhurst Hospital Center program where she served as Chief Resident in her final year. After completing her residency training, Dr Abtahi worked as a staff psychiatrist in the VA Medical Center focusing on PTSD, depression, and anxiety. Dr. Abtahi has held an academic appointment at the University of UT Southwestern medical school and has spent her professional career supervising/teaching medical students and psychiatry residents. Dr. Abtahi's practice focuses on medication management and providing psychoeducation to her patients. However, if indicated, Dr. Abtahi may believe that additional therapy is also needed and ask that you bring a therapist into your care team to provide the best outcome. Dr. Abtahi has experience treating a large variety of mental health conditions across a variety of populations. She strongly believes in tailoring treatments through a holistic and patient-centered approach based on individual and multi-faceted histories. Dr. Abtahi looks forward to working with you.

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. Delane Casiano is a board-certified adult psychiatrist with specialized interest and expertise in cultural psychiatry. She earned her undergraduate degree from Brown University and her medical degree from Morehouse School of Medicine. She completed psychiatry residency and research fellowship at the University of Pennsylvania. Such organizations as the American Psychiatric Association, National Institute of Mental Health, and Philadelphia Department of Behavioral Health have recognized her research examining cultural influences on mental health beliefs and service utilization.

Dr. Casiano brings a systems-based, culturally informed perspective to her work. With over 15 years of experience, she has supported individuals with diverse backgrounds and identities. Examples of her leadership of multidisciplinary teams include serving as associate medical director of a women's trauma program and founding an integrated care program for underserved communities. She has directed academic training programs, presented at national conferences, and led numerous community-based events focused on mental health awareness and stigma reduction.

Dr. Casiano values compassion and collaboration in the treatment relationship. She helps patients navigate depression, anxiety, ADHD, and post-traumatic stress, while also supporting those facing major life transitions.

Her approach combines evidence-based medication management, supportive therapy, and

psychoeducation. She tailors each treatment plan to the individual while offering encouragement and structure.

Dr. Sarita Sharma is a board-certified adult psychiatrist dedicated to providing personalized psychiatric treatment that addresses the mind, body, and spirit for optimized health and healing. Born and raised in Toronto, Ontario, she earned her medical degree from Avalon University School of Medicine in Curacao and completed her residency at Southern Illinois University in Springfield, Illinois. Dr. Sharma has extensive experience working with underserved patients from diverse backgrounds and with varying severities of psychiatric disorders. She has a genuine interest in treating mood and anxiety disorders like depression and anxiety. She views medication as one of many tools to aid patients, emphasizing the importance of therapy and lifestyle changes aligned with each patient's goals. Believing in a holistic approach, she incorporates mindfulness techniques, lifestyle optimization (sleep, diet, movement), Dialectical Behavioral Therapy (DBT), Cognitive Behavioral Therapy (CBT), and Acceptance and Commitment Therapy (ACT) to target the root causes of unease. She enjoys helping patients navigate meaning and purpose, relationship dynamics, and self-image. With a sincere, direct, and practical approach, Dr. Sharma values empathy and understanding as vital components of effective care. In her free time, she enjoys spontaneous adventures, connecting with fellow human beings, and just being in nature. She is committed to helping you achieve a balanced, fulfilling life.

Dr. Megan Freeman is board certified by the American Board of Psychiatry and Neurology in Adult Psychiatry. She completed her residency training at Vidant Medical Center at East Carolina University in Greenville, North Carolina in 2021 where she was the chief resident. Since then, she has worked as an attending physician at an inpatient adult psychiatric unit in Burlington, North Carolina. As a resident and attending she has treated adults of all ages and in all areas of mental health. Dr. Freeman's talkiatry practice will mostly focus on medication management in conjunction with support or acceptance-based therapy during 30-minute follow-up visits. During this time, Dr. Freeman hopes to collaborate with her patients to help set treatment goals and ways to track progress in between appointments. Dr. Freeman is board certified in adult psychiatry. She enjoys seeing patients with a wide variety of diagnoses including, but not limited to, major depressive disorder, bipolar disorder, post-traumatic stress disorder, obsessive-compulsive disorder, and generalized anxiety disorder. She enjoys combining medication management with various therapy techniques.‍

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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