Samuel Russell, MD

Dr. Mark Varela is a board-certified psychiatrist joining Talkiatry directly out of residency. He focuses primarily on medication management, often accompanied by brief cognitive, motivational, or supportive therapy. He may request that you also meet with a therapist regularly for your benefit. Dr. Varela received his medical degree and general psychiatric residency training both from Texas Tech University Health Sciences Center in West Texas. He treats young adults and adults with a wide variety of mental health concerns, including ADHD, mood disorders, anxiety, OCD, and PTSD.

Dr. Peter Hsieh has experience practicing in both outpatient and inpatient psychiatric settings. He earned his medical degree from the Zucker School of Medicine at Hofstra/Northwell and completed his psychiatry residency at Zucker SOM at Mather Hospital.

Dr. Hsieh values patient education and shared decision-making. He fosters a nonjudgmental environment where patients feel heard and supported, working collaboratively to develop a treatment plan that fits their goals and needs.

Dr. Hsieh begins with a comprehensive psychiatric evaluation and partners with each patient to create an individualized treatment plan that aligns with their values and evidence-based care. His approach often combines medication management with psychotherapeutic modalities.

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.

Michael Robbins is a psychiatric nurse practitioner with over 17 years of experience specializing in psychiatric medication management. He earned his MSN from the University of Tennessee in 2006. His career spans various settings, including acute inpatient care, private practice, community mental health, and substance abuse treatment. Michael treats conditions such as depression, anxiety, PTSD, OCD, bipolar disorder, and ADHD. He has worked both remotely and in-person, adapting to the evolving healthcare landscape. Michael is known for his expertise in psychopharmacology, tailoring treatment plans to each patient’s needs while minimizing side effects. His compassionate and patient-centered approach has made him a trusted provider in the mental health community.

Dr. John Weller, MD, is a psychiatrist with a strong foundation in science and clinical care. He earned his undergraduate degree in molecular genetics from the University of Vermont and conducted neuroscience research in both academic and industry settings. A graduate of St. George’s University School of Medicine, he completed his psychiatry residency at Mather Hospital, Northwell Health, where he was honored as Resident of the Year in 2025 and inducted into the Alpha Omega Alpha Honor Medical Society.

Dr. Weller is committed to providing compassionate, evidence-based care that considers the full spectrum of biological, psychological, and social factors. He builds therapeutic relationships on empathy, respect, and trust. By tailoring treatment plans to each patient’s personal and cultural context, he helps individuals take control of their mental health and work toward long-term recovery and resilience.

In the first session, Dr. Weller takes time to listen carefully and gather a thorough understanding of each patient's concerns, history, and current functioning. He uses empathy and active listening to foster open communication and develop personalized treatment plans that may include therapy, medication, or lifestyle changes, with the goal of restoring wellness and stability.

Dr. Jacobs is board-certified in Adult Psychiatry by the American Board of Psychiatry and Neurology. She specializes in medication management for adult patients across a range of psychiatric conditions, with a focus on treating depression, anxiety, bipolar disorders, and ADHD. Dr. Jacobs employs a therapeutic approach to medication management, incorporating supportive and psychodynamic psychotherapies into her sessions. She selects psychopharmacological treatments and therapies tailored to each patient's individual needs and symptoms. Dr. Jacobs earned her Bachelor of Science in Science and Business from the University of Notre Dame. She graduated from medical school at the University of Mississippi, where she was honored with membership in the Gold Humanism Honor Society for her exceptional clinical skills, interpersonal abilities, and dedication to patient care. She then returned to Texas to follow her passion for mental health, completing her residency in Psychiatry at the University of Texas Southwestern Medical Center. Dr. Jacobs developed a strong enthusiasm for enhancing mental health care within communities and completed a fellowship in Community Psychiatry through the UT Southwestern Altshuler Center for Education and Research in the Dallas-Fort Worth area. Over the years, she has worked with major community mental health organizations across Texas and has recently focused on leveraging telemedicine to coordinate mental health support with primary care providers. Throughout her career, Dr. Jacobs has been committed to psychiatric research, educational initiatives, and organizational efforts to advance mental health care education and patient care in communities. She is an active member and leader in several medical and psychiatric organizations. Dr. Jacobs takes great pleasure in connecting with patients via telemedicine, focusing on meeting them where they are in their mental health journey and supporting their needs and goals.