Geoffrey Peckover, MD

Dr. Roxanne McClung is completing her General Psychiatry Residency at the University of Texas Health Science Center at Tyler, where she serves as Chief Resident. She earned her MD from the American University of the Caribbean and holds a Master of Science in Clinical Psychology from the University of Texas at Tyler and a BA in Psychology from Southern Methodist University. With over 20 years of experience in mental health, she has worked as a case manager, psychotherapist, and program/clinical director.

Dr. McClung is passionate about helping people through life’s challenges. She creates a non-judgmental, patient-centered environment that fosters open communication and collaboration. She emphasizes individualized care and integrates lifestyle medicine and psychotherapy, primarily using Cognitive Behavioral Therapy and Cognitive Processing Therapy.

Dr. McClung begins with a thorough assessment to understand each patient’s history, concerns, and goals. She works collaboratively to create a personalized treatment plan that may include medication and evidence-based therapy. Her approach ensures clarity, respect, and patient involvement throughout the process.

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. De Paz received his medical degree from the University of Texas Medical Branch in Galveston, TX, and has been practicing for 9 years. He completed his psychiatric residency and child and adolescent psychiatry fellowship training at the University of Texas Medical Branch. After completing training, he worked at the Center for Health Care Services in San Antonio, TX. He worked with special needs children and adults who required the highest level of care both behaviorally and medically. He then continued his treatment of children and young adults at CommuniCare Health Center also in San Antonio. He served as Director of Behavioral Health for CommuniCare for 4 years. Dr. De Paz completed his undergraduate studies in Psychology and Biology at the University of Houston in Houston, TX. While having treated a wide variety of patients, his primary clinical focus has been the treatment of ADHD in children and adults, and working with special needs children and adults who may have Autism Spectrum Disorder or other Intellectual or Developmental Disabilities. Dr. De Paz's practice focuses on medication management. He offers medication management evaluations and follow-up visits. If the need arises, he works with licensed therapists to provide behavioral support.

Dr. Candice Hacker is a board-certified Psychiatrist at Talkiatry. She completed her Psychiatry residency and a fellowship in Consultation Liaison Psychiatry at Mount Sinai/St. Luke's Hospital. She is passionate about a holistic approach to patient care, trained in psychosomatic medicine, and she has a deep appreciation for the intricate connection between the mind and body. With over 20 years of experience, Dr. Hacker has facilitated excellent outcomes in the treatment of various mental health conditions, including anxiety disorders, mood disorders, and trauma-related conditions. Dr. Hacker believes in creating a safe, nurturing and non-judgmental environment where patients can openly explore their emotions and experiences. By integrating evidence-based psycho-pharmacological modalities with mindfulness and cognitive-behavioral techniques, she empowers her patients to challenge a negative mindset and reach their goals. Beyond her clinical practice, Dr. Hacker is deeply committed to community mental health advocacy and the destigmatization of mental illness.

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.

Dr. Katherine Vital-Daley is an adult psychiatrist at Talkiatry. She treats all adults and her passion lies in providing accessible care for women facing challenges throughout pregnancy, childbirth, and postpartum and in reproductive psychiatry. Dr. Vital-Daley's academic background is rooted in science, with an undergraduate degree in biochemistry and molecular biology from the University of California, Merced. She then pursued her medical doctorate at the Medical University of the Americas. Following medical school, she completed her psychiatry residency training. The first two years were spent at East Carolina University, Brody School of Medicine, with a culmination of her last two years of residency at Allegheny Health Network in Pittsburgh, Pennsylvania, to further specialize in women's mental health, which solidified her expertise in this vital area.‍At Allegheny Health Network's Women's Behavioral Health clinic, Dr. Vital-Daley honed her skills in treating a range of conditions, including depression, anxiety, PTSD, OCD, bipolar disorder, and related issues, and served as a medical provider for their intensive perinatal/postpartum outpatient clinic. She also developed a deep understanding of perinatal mental health, supporting patients coping with perinatal loss and traumatic birthing experiences. In her practice, she employs supportive psychotherapy and mindfulness along with evidence-based medication management, utilizing the most current clinical guidelines and treatment modalities. ‍Dr. Vital-Daley's approach is rooted in a collaborative treatment approach. She works closely with patients, exploring past and current stressors and any relevant medical conditions to develop a comprehensive understanding of their individual needs. Recognizing the importance of cultural competency, she incorporates patients' unique backgrounds, beliefs, and core values into her care plans.