Diane Lewis, MD

Dr. Siera Kirkland is an adult general psychiatrist. She is a diplomate of the American Board of Psychiatry and Neurology. She has been practicing for 8 years. Dr. Kirkland focuses on collaborative and evidence-based care. She believes it is imperative to form a therapeutic relationship with each individual and work together as a team to formulate the best treatment plan. Her passion is to educate, empower, and support. She specializes in medication management and brief psychotherapy .Dr. Kirkland received her medical degree from Ross University School of Medicine. She completed her residency at The Cleveland Clinic Akron General and Summa HealthSystem in her hometown of Akron, OH. Upon completion of residency, she relocated to Charlotte, NC to start her career as the Lead Psychiatrist at Novant Health Psychiatric Associates- Matthews. Dr. Kirkland has experience in treating various patient populations. Her areas of focus have been perinatal and postpartum depression and anxiety. She has also worked with adults with co-occurring substance use disorders. Special interests include women's health and minority mental health disparities.‍For established patients of Dr. Kirkland, call 917-634-5311 to schedule an appointment and let the care coordinator know you are an established patient.

Background and credentials

Dr. Yang is board-certified in both General Psychiatry and Addiction Psychiatry. She received her medical degree from the Medical School of Nanjing University in China and completed her Ph.D. in Neuroscience at the State University of New York in Buffalo. She conducted neuroscience research at Tufts University and Columbia University. Dr. Yang completed her residency in Psychiatry at the University of Texas Health Science Center at Houston – McGovern Medical School (UTHealth) and a fellowship in Addiction Psychiatry at Baylor College of Medicine. She has held academic positions at Baylor College of Medicine, supervising medical students, residents, and physician assistant students.

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Treatment approach

Dr. Yang specializes in treating depressive disorders, bipolar disorders, anxiety, substance use disorders, ADHD, and trauma-related disorders. She employs medication management combined with supportive therapy and motivational interviewing techniques. Dr. Yang emphasizes building strong therapeutic relationships, tailoring treatment to each patient's unique goals and needs.

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What you can expect in a first visit

In the initial visit, patients can expect a detailed, personalized evaluation by Dr. Yang. She will explore symptoms, medical history, personal goals, and treatment preferences to design an individualized care plan. Patients can expect a compassionate, collaborative approach with clear communication about medication management options and supportive therapeutic strategies aimed at improving their overall well-being.

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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. Dennis Valerstain is a board-certified Adult and Child and Adolescent Psychiatrist. After completing his undergraduate education at Emory University, he attended medical school at the Northwestern University Feinberg School of Medicine. He subsequently completed psychiatry residency at University of Miami/Jackson Health System and further sub-specialized at University of Miami/Jackson Health System with a fellowship in Child and Adolescent Psychiatry. Dr. Valerstain has had the opportunity of working with a diverse array of patients including children, adolescents, the severely mentally ill, veterans, and cancer patients across three distinct hospital systems. Dr. Valerstain has had varied clinical experiences in specialty inpatient psychiatry units, emergency psychiatry, consultation liaison psychiatry, psycho-oncology, and outpatient clinics via telemedicine and face to face interactions. Dr. Valerstain has experience working with patients of all ages, particularly those with depression, anxiety, bipolar disorder, ADHD, Tic disorders, substance use disorders, and more. Dr. Valerstain's practice focuses on medication management and also employs empathic listening, supportive psychotherapy techniques, and a comprehensive and methodological approach to his visits. Given his broad and diverse training experiences, he enjoys problem solving and working collaboratively with patients (and their families) to navigate their complex issues and jointly focusing on simple solutions to work towards improving their mental health.

Amanda Bevan is a licensed therapist with five years of experience working with adults. She holds a Master of Social Work from The Ohio State University and is licensed as an LISW-S in Ohio and an LCSW in Maine and Virginia. Amanda has experience treating anxiety, depression, stress, trauma, life transitions, and self-esteem, and has worked primarily with adults in community mental health, healthcare, and outpatient substance use and mental health settings. Her clinical work draws from evidence-based approaches including CBT, DBT, ACT, mindfulness-based therapy, motivational interviewing, and strengths-based care.

Amanda brings a warm, collaborative, and nonjudgmental style to therapy. She believes treatment should be personalized, goal-focused, holistic, and centered on each individual’s unique needs. She prioritizes creating a safe and supportive space where patients feel heard, respected, and empowered throughout their therapeutic journey.

Amanda begins with a comprehensive initial session to understand each person’s concerns, history, and goals. She partners with patients to develop individualized treatment plans and uses ongoing sessions to build skills, deepen insight, and track progress. Treatment is regularly reviewed and adjusted as needs and goals evolve.

Dr. Zac Keller, DO, DABPN (he/his), is a board-certified psychiatrist with experience across inpatient and outpatient settings. He has held leadership roles including Interim Medical Director and Director at Richard Young Hospital, where he also created and led the hospital’s ECT program. Dr. Keller’s clinical focus includes ADHD, PTSD, and personality disorders, and he brings an integrative lens to psychiatric care.

Dr. Keller takes a collaborative, supportive, and evidence-based approach to treatment. He values confidentiality, culturally sensitive care, and trauma-informed practice. Known for his warm yet direct communication style, he works to create a respectful, nonjudgmental environment where patients feel heard, understood, and actively involved in their care.

Care begins with a comprehensive intake that explores medical, psychiatric, social, and functional aspects of a patient’s life. Session length and frequency are tailored to individual needs. Treatment plans are developed collaboratively and may include medication management combined with talk therapy and other evidence-based interventions. Progress is reviewed regularly and adjusted based on ongoing dialogue.

Dr. Taylor Brady, MD, MBA, is a psychiatrist who found his passion for mental health care through the power of listening to people’s stories. His background includes medical training at the University of Utah, leadership as Student Body President, and psychiatric residency at the University of Texas, where he served as Inpatient Chief Resident and received awards for both clinical excellence and medical education. he brings that same commitment and curiosity to his work with patients. Outside of clinical care, he is deeply interested in narrative medicine—the way our personal stories shape our mental health—and uses that lens to help patients find meaning, clarity, and strength in their own journeys.

As a psychiatrist, Dr. Taylor Brady approach is rooted in compassion, collaboration, and respect for your unique story. He views mental health treatment as a partnership—one where psychotherapy and medication can work together to support your growth and healing. His goal is to help you uncover the patterns and behaviors that may be holding you back, and empower you to make meaningful, sustainable change. He encourages patients to take ownership of their mental health, and he is here to provide the tools, guidance, and support you need along the way.

We’ll begin by taking the time to understand your story, your goals, and what brings you to treatment. The first few sessions focus on building trust and identifying the areas where you’d like to see change. From there, we’ll collaboratively develop a treatment plan that may include psychotherapy, medication, or both—always tailored to your needs. He draws from multiple therapeutic approaches, including Cognitive Behavioral Therapy (CBT), Cognitive Processing Therapy (CPT), and Psychodynamic Psychotherapy, to provide care that fits you, not the other way around. Throughout our work, he'll support you in developing insight, resilience, and confidence in managing your mental health.

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