Sumeet Singh, MD

Background and credentials

Dr. Stephanie Powers is a board-eligible psychiatrist with over 18 years of experience in psychiatric care. She earned her advanced medical degree from Adelphi University and completed her psychiatry residency training at SUNY Stony Brook University Hospital and Medical Center. Additionally, she holds a master’s degree in Developmental Psychology from Columbia University. Dr. Powers has held academic roles as an Associate Professor at Stony Brook University Hospital Medical Center and as a clinical instructor at New York College of Osteopathic Medicine, where she has supervised and trained residents and medical students.

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Treatment approach

Dr. Powers specializes in medication management and supportive therapy, providing compassionate psychiatric care tailored to individual patient needs. She has extensive experience treating adults in inpatient, outpatient, and emergency psychiatric settings, with a particular focus on PTSD in veterans. She has worked at Zucker Hillside Hospital, Pederson-Krag, Brookhaven Memorial Hospital, Northport VA Medical Center, Nassau University Medical Center, and Damian Family Care Centers. Her treatment philosophy is centered on helping patients reach their full potential and improve their overall quality of life.

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What you can expect in a first visit

During the first visit, patients can expect a comprehensive psychiatric evaluation, where Dr. Powers carefully assesses their symptoms, medical history, and personal goals. She prioritizes collaborative treatment planning, ensuring that each patient receives a personalized approach that may include medication management and therapeutic interventions. Her approach is patient-centered and focused on fostering well-being, with ongoing support to help individuals achieve their mental health goals.

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Why Talkiatry?

We’re a virtual mental health practice that makes it easy to find great care. We combine quality and convenience to help you thrive—faster. Our providers, like this one, are highly trained experts who specialize in medication management and collaborate with you on a treatment plan that fits your needs and comfort level.

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Dr. Angela Shields is a board-certified adult psychiatrist with over 10 years of experience. Dr. Shields' clinical expertise includes treating adults with depression, anxiety, PTSD, and substance abuse. Dr. Shields' greatest passion is bringing healing and hope to those experiencing stress in their lives. Dr. Shields takes an evidence-based, whole health approach to patient care and believes in meeting you "where you are” on your road to recovery. Dr. Shields will welcome you with empathy and sincerity combined with a direct approach to treatment. Dr. Shields grew up in Gulf Breeze, FL. She obtained her Bachelor of Science from Cornell University, graduating Summa Cum Laude. She then completed the Medical Scientist Training Program at Vanderbilt Medical School, earning both her MD and her Ph.D. in Molecular Physiology and Biophysics. Her Ph.D. research focused on stress and its role in relapse to addiction. Following a four-year residency in Psychiatry at Vanderbilt Medical Center, Dr. Shields became board certified in both General Psychiatry and Addiction Medicine. Dr. Shields lives in Nashville, TN. She enjoys hiking, cycling, reading, puzzles, and travel.

Catherine is a graduate from the City University of New York (CUNY) Brooklyn College where she received her Master's Degree in Mental Health Counseling. She is a Licensed Mental Health Counselor experienced in working with adults that struggle with an array of different issues for the past 7 years, both in outpatient and private practice settings. Coupled with her empathic and non-judgmental attitude, she uses a person-centered approach when working with clients. She strives to meet the clients where they are at. Catherine has a passion for helping others reach their full potential, rebuild their confidence, and gain a better insight into themselves through using psychodynamic and CBT interventions. She promotes and encourages "progress over perfection."

Dr. Lyman is a board-certified psychiatrist who values the lived experience of every individual seeking treatment. She completed her undergraduate studies at Stanford University, received her MPH from the University of Hawai'i, Manoa, and graduated with her MD from the John A. Burns School of Medicine. She completed her residency training in Psychiatry at the Queens Medical Center, where she served as chief resident. She is currently pursuing a nutritional psychiatry certificate through the Integrative Psychiatry Institute and has a particular interest in the connection between the food we consume and our emotional well-being. While her practice focuses on medication management, she often takes the time to provide supportive, cognitive or dialectical based therapy in a follow-up visit. She believes that achieving mental wellness extends beyond addressing one's symptoms and hopes to guide her patients towards feeling aware and empowered. She has experience treating depression, anxiety, OCD, PTSD, bipolar as well as other conditions.‍

*THIS PROVIDER CANNOT PRESCRIBE CONTROLLED SUBSTANCES FOR NH PATIENTS* Doctor Phillip Sullivan is a staff psychiatrist at Talkiatry. He is board certified in both adult psychiatry and child and adolescent psychiatry. His interest in psychiatric treatment was originally triggered by the humanistic writings of Abraham Maslow, Carl Rogers, and Rollo May. As he earned his medical degree and started post-graduate psychiatric training, he went on to learn psycho-pharmacological, cognitive-behavioral, and psychodynamic treatment approaches. He combines these perspectives in diagnosing and treating psychiatric conditions including depression, bipolar spectrum disorders, anxiety, stress and trauma related disorders, adjustment problems, maternal mental health, OCD, ADHD and other disorders. His practice focuses on supportive pharmacological treatment, and he sees listening and empathy as essential elements of the treatment process. He strives to provide a comfortable experience in which doctor and patient work together to understand the presenting problems, develop a treatment plan, reduce symptoms, and optimize functioning. Doctor Sullivan supports and encourages concurrent psychotherapy and will work collaboratively with therapists to optimize the best treatment results. Doctor Sullivan received his MD degree from Brown University Alpert School of Medicine. After completing a medical-surgical internship, he went on to a residency in adult psychiatry and a fellowship in child and adolescent psychiatry at Harvard Medical School's Massachusetts Mental Health Center. He has held academic appointments at Harvard Medical School and the University of New England School of Osteopathic Medicine. In the 36 years following completion of his training, he has worked as the medical director of a mental health center on the under-served Eastern Shore of Maryland, as the medical director of a child and adolescent psychiatric inpatient unit, as a staff psychiatrist at New Hampshire's Dartmouth Hitchcock Clinic, and as the medical director of child and adolescent psychiatric services at Concord New Hampshire's mental health center. Before joining Talkiatry, he served for 18 years as the chief of psychiatry at Southern New Hampshire Medical Center where he also spent three years as the hospital's chief of staff.

Dr. Rachel Sherhart is a board-certified adult psychiatrist who has been in practice for over 4 years. She specializes in medication management with 30-minute follow-up visits. This may be accompanied by elements of supportive therapy, Acceptance and Commitment Therapy (ACT), Dialectical Behavior Therapy (DBT), and psychodynamic therapy. If more in-depth work is needed, she may refer patients to a collaborating psychotherapist. ‍Dr. Sherhart received her medical degree from Texas A&M Health Science Center and completed her psychiatry residency training at the University of Texas Southwestern in Dallas, Texas. She has served as faculty at Texas A&M University College of Medicine, providing education and supervision for psychiatry residents and medical students. ‍She has experience treating adult patients from many walks of life with a broad range of diagnoses, including depression, anxiety, bipolar disorder, ADHD, and trauma-related disorders. Dr. Sherhart has a passion for providing excellent patient care and education. Her goal is for patients to feel heard and find a safe place to discuss their concerns. She is motivated to work collaboratively with patients to find a solution that best fits their treatment goals and improves their overall quality of life.‍