Natalie Cummings, MD

Melissa Medina, LCSW, began her journey in mental healthcare with a Bachelor’s in Psychology followed by a Master of Social Work degree. From 2015 to 2018, she completed her clinical hours at a community mental health agency in Los Angeles, where she gained experience working with diverse populations facing complex challenges. Melissa’s therapeutic approach integrates psychodynamic, cognitive behavioral, interpersonal, strengths-based, dialectical behavioral, and EMDR modalities. She is dedicated to providing culturally sensitive, neurodivergent-friendly, person-centered care to support individuals and families navigating trauma, anxiety, depression, mood disorders, panic attacks, grief, family conflict, and life transitions.

Melissa believes therapy is both a journey and a destination. She takes an eclectic approach, tailoring interventions and communication to best fit each patient’s needs and preferences. Patients can expect an atmosphere of warmth, empathy, and collaboration. Through motivational interviewing and narrative techniques, Melissa helps individuals articulate their stories, identify strengths, and reframe challenges as opportunities for growth. She is committed to meeting patients where they are while supporting them in reaching their goals.

Melissa’s process begins with building rapport, listening to each patient’s story, and understanding their unique needs and hopes for therapy. Early sessions focus on creating a safe, supportive space while developing a treatment plan tailored to the individual. Patients can expect to gain fresh perspectives, practical coping strategies, and deeper self-awareness. Melissa’s goal is for patients to feel heard, understood, and empowered as they strengthen relationships, build resilience, and move toward a greater sense of fulfillment.

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.

Dr. Jane Eisen comes to Talkiatry from her previous position at McLean Hospital, in Boston, where she was Clinical Director of the Depression and Anxiety Division, overseeing the integration of clinical work, faculty development, and research in the division. Clinically, she has experience working with people with significant mood and anxiety difficulties. Dr. Eisen's practice focuses on using an integrated approach to the understanding and treatment of individuals' psychosocial stresses and psychiatric symptoms. Her sessions are usually 30 minutes. She frequently suggests including a family member or friend in at least one session to get a comprehensive sense of each person's strengths and challenges. She received her medical degree from NYU and completed her psychiatric residency at Mt. Sinai Hospital. She spent a number of years in the Brown system, as Training Director for the Brown Psychiatry Residency and as Vice-Chair of the Brown Department of Psychiatry. For several years, she served as Chair of the Department of Psychiatry at Mt. Sinai West/St. Lukes' prior to her position at McLean, as Clinical Director of the McLean Hospital Depression and Anxiety Division. She has worked primarily with outpatients with the exception of a recent period of residential work at the Pavilion at McLean Hospital. Dr. Eisen is a general psychiatrist with a focus on anxiety disorders, OCD, and mood disorders. She is interested in the impact of trauma and personality and has extensive experience working with young adults.

Ronnie Butler is a Licensed Professional Counselor with over 20 years of experience practicing in psychiatric, clinical, and inpatient settings. After completing an undergraduate degree in psychology in Oklahoma, Ronnie earned a graduate degree in Counseling Psychology from Sam Houston State University in Huntsville, Texas. He is licensed in Oklahoma, Texas, and New Mexico, and holds an endorsement from the Oklahoma State Board of Behavioral Health as a Clinical Supervisor for LPC Interns. Ronnie is also an active member of the American Counseling Association and the Oklahoma Counseling Association’s Mental Health Counselors Division.

Ronnie focuses on supporting individuals facing depression, anxiety, mood instability, trauma, adjustment challenges, attention difficulties, and substance use concerns. He values open communication and collaboration, helping patients set clear and realistic treatment goals. Ronnie strives to create a warm, supportive environment where patients feel heard, respected, and empowered to engage in their own growth process.

In the initial session, Ronnie takes time to thoroughly understand each patient’s history, concerns, and personal goals. He then develops an individualized, measurable treatment plan that aligns with each patient’s needs. Throughout the therapeutic process, Ronnie regularly reassesses progress to ensure therapy remains meaningful, effective, and tailored to achieving lasting change.

Dr. Michael Petetit has worked with people from many different walks of life in clinics, hospitals, and online, providing evidence-based treatments for a wide range of mental health conditions. His professional journey is unique—he began his career as a research chemist, later earned a Master’s degree in psychology and worked with children, before pursuing his medical degree and completing a psychiatry residency.

Dr. Petetit approaches treatment as a true collaboration. He partners with patients to clarify goals and create individualized treatment plans that reflect their priorities and values. He strives to be non-judgmental, direct, and honest in his style, building a therapeutic relationship that supports open communication and trust.

Dr. Petetit begins with a thorough evaluation to understand each patient’s circumstances and challenges. From there, he works with patients to set and prioritize goals, review treatment options, and select a plan that feels both comfortable and practical. As treatment progresses, he regularly revisits and refines the plan, ensuring it remains effective and aligned with the patient’s evolving needs.

Dr. Giselle Brito is board-certified in adult psychiatry and has been practicing for over 4 years. She received her medical degree from San Juan Bautista, School of Medicine in Puerto Rico and continued her medical education at Jackson Memorial Hospital & University of Miami Hospital for her 4-year psychiatry residency training program. After completing her training, Dr. Brito worked at the Miami Veterans Affairs Hospital and then the Orlando Veterans Affairs Hospital in the primary care mental health integrated model. Dr. Brito also holds certification in Perinatal Mental Health. Dr. Brito's practice focuses on medication management and supportive psychotherapy in typically 30-min follow up visits. At times, additional psychotherapy is needed and a therapist may be added to provide the best outcome.‍