Aileen Kim, MD

Dr. Ayanna Swinton Jamison is a board-certified psychiatrist with over 18 years of experience in general, as well as child and adolescent psychiatry. She has extensive experience in counseling, and medication management. Dr. Jamison is committed to educating her patients about their illness and providing personalized care for each patient. Dr. Jamison received her undergraduate degree from Jackson State University. She graduated from Saint Louis University Medical School and completed her residency training in general psychiatry and child and adolescent psychiatry at the University of South Carolina. Dr. Jamison is a proud mom of four who enjoys spending time with her family, and attending her kids' sports events.

Dr. Thomas Simeone is Board Certified by the American Board of Psychiatry and Neurology in Psychiatry.  Following his completion of medical school at Universidad Autonoma de Guadalajara, he completed his Fifth Pathway Clinical Training at New York Medical College.  He then completed his Psychiatry Residency at Tuft's University in Boston, MA, and went on to complete a Child and Adolescent Fellowship Program at the University of Florida in Gainesville FL.  He has since worked in both hospital inpatient and outpatient settings, as well as in Residential Treatment for adolescents. Dr. Simeone has treated a wide spectrum of mental health conditions including Anxiety and Depression Disorders, as well as Mood Disorders and Post Traumatic Stress Disorder. He has also treated ADHD, OCD and Eating Disorders in adults and adolescents. Dr. Simeone has worked in Telehealth Practice for the past 4 years. He is a Fellow of the American Psychiatric Association (APA) and a member of the American Medical Association (AMA).

Dr. Simeone utilizes medication management and psychotherapy practices to achieve treatment goals for his patients.  During an initial assessment and evaluation, a thorough review of the patient's previous mental health treatment is considered.  Dr. Simeone assesses patients' acute symptoms including recent stressors and exacerbating factors and then establishes a comprehensive treatment plan with the patients' goals in mind.  Psychotherapy with medication is incorporated into the treatment plan of all patients.  Dr. Simeone always aims to achieve full remission of symptoms for his patients.

Dr. Simeone's practice focuses on medication management with facets of various psychotherapeutic techniques.  He conducts 30 medication management follow up sessions. Dr. Simeone is a sincere and empathic physician who advocates for patient autonomy and believes in a direct and transparent approach to patient treatment. He encourages active patient participation in their treatment plans.

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Dr. Deringer is a psychiatrist with board certification in general psychiatry and addiction psychiatry. She earned her M.D. from the University of Michigan Medical School, and she completed her psychiatry residency and addiction psychiatry fellowship training at New York University. She has previously held faculty roles at New York University School of Medicine and Harvard Medical School. She has been involved in training the next generation of psychiatrists through her past work on the Program Director team for the MGH-McLean Psychiatry Residency Program. She has expertise in treating adults with mood disorders, anxiety disorders, substance use disorders, personality disorders, trauma, and ADHD.

Dr. Deringer cares deeply about understanding each patient's unique experience.  She recognizes that mental health symptoms are impacted by an individual's biological make-up, social situation, and their individual way of interacting with others in the world.  She will assess all of these factors and work with you to develop an appropriate treatment plan to help you feel better and meet your goals.  She incorporates supportive psychotherapy into all of her patient meetings; this may include discussions of the role of nutrition, exercise, and sleep habits in your overall well-being.

Dr. Deringer will begin the evaluation process with a thorough one-hour session in which we will discuss your current symptoms, your prior treatment history, your medical history, and your goals for treatment.  At the end of that session, she will begin to formulate her diagnostic impression and treatment recommendations.  Sometimes, the evaluation process may require more than one session, and it may be helpful for Dr. Deringer to gather information, with your permission, from prior treatment or to collaborate with your therapist if you have one.  Dr. Deringer will work with you on a medication treatment plan, if clinically indicated, to help you manage your symptoms and achieve your treatment goals.

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. Gulati is a board-certified adult psychiatrist who has been in practice for over 10 years. She has worked in inpatient units, private practice, and community mental health, as well as served as Chief Medical Officer of a large psychiatric hospital. In 2018 she was awarded the Charleston Choice Award for Best Psychiatrist in Charleston, South Carolina. She currently resides in South Florida. Dr. Gulati's practice centers around treating the whole patient: mind, body, and spirit. She believes the judicious use of psychiatric medications, coupled with psychotherapy and alternative treatments such as meditation and yoga, can bring about transformative changes in the lives of those suffering from depression, anxiety, and other mental conditions and life issues. Dr. Gulati graduated with Honors in Psychology from The University of Florida, received her medical degree from The University of South Alabama School of Medicine, completed a clinical postdoctoral research fellowship at Boston University School of Medicine, and completed her Psychiatry residency training at The University of North Carolina. She is currently obtaining her MBA. After residency, she worked as a psychiatric hospitalist at Trident Medical Center in Charleston and has also worked in private practice. Most recently she served as Chief Medical Officer for an 80-bed psychiatric hospital, Coral Shores Behavioral Hospital in Stuart, FL. In addition to general adult psychiatry, Dr. Gulati received extensive training in one of the nation's largest women's mood disorder programs at The University of North Carolina Chapel Hill and enjoys treating peripartum and postpartum mood and anxiety disorders. She is also well trained in addiction medicine and received additional training in buprenorphine use for opioid addiction.

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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