Dennis Valerstain, MD

Background and credentials

Dr. Sinner is board-certified in Psychiatry. He completed his psychiatry residency training at Dartmouth-Hitchcock Medical Center. With over 14 years of experience, he has worked in a variety of settings, including five years in inpatient psychiatry in Vermont, where he served as Medical Director for a state hospital psychiatric unit and taught medical students. He then spent five years working in an outpatient community mental health center in Pennsylvania before transitioning to telepsychiatry, providing care to individuals in Pennsylvania, Florida, and New York.

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Treatment approach

Dr. Sinner employs a collaborative, patient-centered approach, tailoring treatment plans to meet each individual's specific needs. His practice integrates pharmacotherapy with cognitive behavioral therapy (CBT) and supportive therapy as needed. He specializes in treating a wide range of psychiatric conditions, including depression, bipolar disorder, anxiety, ADHD, neuropsychiatric disorders, developmental disorders, and personality disorders. His philosophy is to provide personalized care that makes a meaningful impact at different stages of a patient’s life.

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What you can expect in a first visit

During the first visit, patients can expect a comprehensive evaluation focused on understanding their mental health concerns, history, and treatment goals. Dr. Sinner takes a compassionate and collaborative approach, working closely with patients to create individualized treatment plans. He ensures that each patient receives a balanced and effective combination of medication management and therapeutic interventions suited to their unique needs.

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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. Stoddard earned his medical degree from the University of Arizona College of Medicine - Tucson and completed his residency at the University of Arizona College of Medicine - Phoenix. He is board-certified in psychiatry and provides care for adult patient populations. Prior to his career in medicine, he proudly served in the U.S. Air Force.

Although Dr. Stoddard specializes in medication management of psychiatric conditions, supportive psychotherapy is often incorporated into his visits, as he believes a combined approach leads to a more robust treatment response. Additionally, he aims to enhance wellness through discussion of lifestyle modifications that emphasize quality sleep, a healthy diet, and regular exercise.

Initial appointments consist of a psychiatric evaluation and discussion of evidence-based treatment options. If telehealth is deemed to be an appropriate modality and pharmacotherapy is recommended, discussion will consist of selecting a suitable medication to address target symptoms while minimizing adverse effects. Follow-up visits focus on assessing treatment response and adjusting regimens to optimize outcomes.

Tekisha Norwood, LCSW, is a Licensed Clinical Social Worker with over a decade of experience supporting adults navigating mental health challenges, chronic illness, trauma, life transitions, and aging-related concerns. She has an extensive background in inpatient, outpatient, and residential settings, including roles at the VA community outpatient program, skilled nursing homes, and as a crisis and behavioral health therapist in private practice. Tekisha earned her BSW (2010) and MSW (2012) from the University of Southern Mississippi and is a Certified Clinical Trauma Professional. She is passionate about empowering clients through individualized, compassionate care that meets each person’s unique needs.

Tekisha offers a safe, supportive, and welcoming environment centered on compassion, cultural awareness, and mutual respect. She ensures that every client feels seen, heard, and valued without judgment. Her therapeutic approach is collaborative and flexible, designed to align with each individual’s goals for growth and healing.

During the first session, Tekisha conducts a thorough psychosocial assessment to understand each person’s background, challenges, and goals. Together, she and the client create a personalized treatment plan that guides the therapy process. Follow-up sessions focus on working through the plan collaboratively, with ongoing support, reflection, and adjustments as progress unfolds.

Maegan Roberts, PMHNP, earned her MSN from Indiana University School of Nursing and her BSN from the University of Evansville. She worked as a Registered Nurse in inpatient psychiatry for five years before transitioning to outpatient care as a psychiatric nurse practitioner in 2017. Maegan has experience treating patients across the lifespan, from school-aged children to older adults. She is especially attuned to the challenges of young adulthood, parenting, and navigating complex family dynamics. Committed to lifelong learning, she values the insights and perspectives her patients bring to their care.

Maegan creates a therapeutic environment grounded in dignity, empathy, and respect. She empowers patients through education about diagnoses, symptoms, and medications while promoting autonomy and informed decision-making. Her approach blends psychopharmacology with supportive therapy, skill-building, and sustainable lifestyle strategies, helping patients build insight and resilience.

In the initial appointment, Maegan takes time to understand each patient’s history, concerns, and goals. From there, she collaborates with patients to create and adapt treatment plans that align with their evolving needs, always keeping the individual’s unique context and aspirations at the center of care.

Kevin Seske is a Licensed Clinical Professional Counselor who specializes in Sport and Health Psychology. His approach to therapy is collaborative, empowering, nonjudgmental, trauma informed, and goal-focused. He sees therapy as a method to find the individual's strengths to help overcome any hardships.‍Kevin integrates treatment modalities such as Cognitive Behavioral Therapy, Trauma-Focused CBT, Existential Therapy, and mindfulness techniques. In addition, he incorporates Sports Psychology in sessions where appropriate as he believes physical activity can empower us and teach us life skills that boost self-esteem, promote team building, and aid in relaxation. These methods are proven to show reduction in anxiety and depression.‍Kevin specializes in treating PTSD among young adults, adults, and/or immigrant populations. He is also skilled in treating mental illnesses such as anxiety, depression, grief, emotional abuse, and life transitions. Kevin has been told by clients and colleagues that he has a calming presence and is a good listener.‍Kevin's 10 years of experience as a counselor has included providing trauma-informed care for undocumented minors who arrived at the US border seeking refuge from their home countries, including ones experiencing Adjustment Disorder, PTSD, and ODD. Additionally, Kevin served in a FQHC on the Southwest side of Chicago, in their clinical setting and school-based health center.

Dr. Arballo is board-certified psychiatrist who completed medical school at Lake Erie College of Osteopathic Medicine. He received residency training at University of Texas Health - San Antonio where in addition to clinical training was appointed resident chair of the Quality Improvement and Patient Safety Committee.

Since graduation he has been a staff psychiatrist and the military unit director at Cumberland Hall Hospital providing comprehensive care to child, adolescent, adult, and geriatric patients.

Dr. Arballo provides evidence-based medication management and psychotherapy to address mental health conditions. He is a strong advocate for patient autonomy, quality improvement and psychoeducation.