Diane Lewis, MD

Dr. George Han is an adult psychiatrist who earned his undergraduate degree in Materials Science and NanoEngineering from Rice University, his medical degree from the University of Texas Southwestern Medical Center, and completed his psychiatry residency training at the University of Mississippi Medical Center. Now based in New York City, Dr. Han brings a broad geographic and cultural perspective, having previously lived in China, Canada, Illinois, California, Texas, and Mississippi.  

Drawing on these diverse experiences, Dr. Han is committed to providing culturally responsive and identity-affirming care, with a particular focus on immigrant communities, LGBTQIA+ individuals, and high-performance professionals. He uses a collaborative, narrative-informed approach that centers each patient’s lived experience and values. His integrative method helps individuals recognize emotional and behavioral patterns shaped by cultural, relational, and systemic factors.  

In clinical practice, Dr. Han combines evidence-based medication management with appropriate psychotherapy techniques and elements of executive coaching. This comprehensive approach supports patients navigating high-pressure environments, helping them achieve greater clarity, resilience, and confidence across both personal and professional domains

Dr. Jillian Saad is a board-certified adult psychiatrist who specializes in patient-centered care. She has been practicing for over 8 years in private practice and academic medicine .Dr. Saad focuses on medication management in 30-minute follow-up visits in conjunction with supportive and emotionally focused therapy. She takes a patient-centered approach that acknowledges all the psychosocial aspects of each individual to ensure they receive the most effective treatment possible. She received her medical degree from UMDNJ Robert Wood Johnson Medical School in Piscataway, NJ, then moved to Pennsylvania to complete her residency at Thomas Jefferson University Hospital in Philadelphia. Upon completion of training, Dr. Saad went into private practice for 5 years in southern NJ where she treated children, adolescents, and adults with a wide array of psychiatric disorders. She then went into academic medicine at Cooper University Hospital in Camden, NJ, where she served as the Associate Program Director of the Psychiatry Residency Program supervising and teaching both residents and medical students .Dr. Saad has experience working with a broad range of psychiatric disorders including mood disorders, PTSD, OCD, and ADHD. She also has a strong interest in Women's Mental Health and alternative treatment options.

Dr. Mathews is an adult psychiatrist who works with young adults and adults struggling with anxiety and depressive disorders. She uses a compassionate, non-judgmental, and reflective approach to listening and working with clients. Dr. Mathews' practice focuses on medication management, offered in conjunction with supportive therapy in 30-minute follow-up visits. Dr. Mathews completed medical school at Stony Brook University School of Medicine where she also earned her masters in Medical Humanities, Compassionate Care, and Bioethics. She completed her adult psychiatry residency training program at Montefiore/Albert Einstein College of Medicine. The philosophy of Dr. Mathews' practice is to help promote each individual's natural capacity for healing. She ultimately strives to help clients create rich and meaningful lives while also offering mindfulness skills to empower clients to effectively cope with the pain and suffering that life can bring.

Mary Poupon is an experienced board certified psychiatric APRN/psychiatric nurse practitioner with over 30 years' experience in her field. She completed her graduate work at Columbia University and is published in her field. Her practice sites have included inpatient hospital treatment, partial hospital programs, in-home programs, outpatient clinics and alternative therapy including equine assisted therapy.  She was the program director and clinician with the Ryan White Mental Health Program in New York providing innovative mental health treatment for adolescents and adults living with HIV/AIDS in the boroughs of Manhattan, Queens, Brooklyn and the Bronx.  In 2013 she became certified as an equine assisted psychotherapist and served as the Director of Mental Health at Embrace Hope in Sandy Hook, CT. She was appointed as the Executive Director of Embrace Hope in 2017. Embrace Hope provided treatment to children, adolescents and adults who were victims of trauma related to the shooting at the Sandy Hook Elementary School. She presented a TED x talk in 2018 regarding her work with victims of trauma. She has provided treatment in the outpatient setting for children, teens, and adults. She has provided treatment to young adults at the Covenant House New York shelter program for homeless young adults.

Mary believes the human spirit is resilient. There are many challenges in the lifespan and self-care is paramount to success.

Mary provides psychiatric consultation and assessment and provides a pathway to change. Treatment may include medication management, therapy, and coping skills to assist with life challenges. Mary believes treatment is a partnership and believes in establishing mutually agreed upon goals.

Mary's process for working with patients begins with active listening. The assessment begins with the patient describing why they are seeking engagement in behavioral health treatment at this time. She will complete a psychiatric assessment and evaluation and establish mutually agreed upon goals for treatment. She offers medication management in conjunction with supportive therapy in 30-minute follow-up visits. Mary believes therapy and medication management if indicated together provides the best treatment outcomes.

Dr. Lundgren is a board-eligible adult psychiatrist who completed his residency at the University of Rochester. During his final year, he served as Chief Resident in both inpatient and emergency psychiatry, demonstrating leadership and clinical excellence in high-acuity settings.

Before beginning his medical journey, Dr. Lundgren earned a degree in philosophy from the University of Georgia. He went on to serve as a police officer and investigator near Atlanta, Georgia, for six years. These formative experiences gave him unique insight into the complex relationship between mental health and personal well-being, safety, and fulfillment. Motivated by this perspective, he pursued a degree in neuroscience at Columbia University, graduating with honors, before attending medical school.

Dr. Lundgren brings experience across outpatient, inpatient, and emergency psychiatric care. He emphasizes a strong therapeutic alliance, supportive psychotherapy, and evidence-based treatment. He is committed to understanding people within the context of their experiences and circumstances, recognizing how these factors may contribute to their mental health concerns and strengths.

Dr. Lundgren provides comprehensive psychiatric medication management and cares for individuals experiencing depression, anxiety, trauma-related disorders, and other mental health conditions. When beneficial, he may also recommend collaborating with a therapist to support a more holistic and effective treatment plan.

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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.