Briana Mathews, MD

Dr. Kathryn Bertacchi is board-certified in both adult and child & adolescent psychiatry. Originally from California, she earned her medical degree from University College Cork in Ireland and completed residency and fellowship at Emory University. She has practiced in varied settings, including developing specialized clinics in eating disorders and gender-affirming care. She is a member of several professional organizations including AACAP, APA, and WPATH.

Dr. Bertacchi fosters an inclusive, nonjudgmental environment where patients feel safe to be themselves. She approaches care with curiosity, compassion, and deep respect for each person’s unique story, aiming to help individuals feel genuinely heard and supported throughout their treatment journey.

In early sessions, Dr. Bertacchi works collaboratively to understand patients' lives, goals, and challenges. While her focus is medication management, she integrates cognitive-behavioral, humanistic, and supportive techniques. She may recommend additional therapy as needed and particularly values working with youth and adults from diverse backgrounds.

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. Sabrina Lefcochilos-Fogelquist earned her bachelor’s degree from Georgetown University and her medical degree from Sidney Kimmel Medical College at Thomas Jefferson University. She completed her psychiatry residency at the Icahn School of Medicine at Mount Sinai Morningside/West in New York City. She has experience in outpatient, inpatient, and emergency psychiatry, treating a broad spectrum of mental health conditions across diverse populations.

Dr. Lefcochilos-Fogelquist values compassionate, holistic care and strives to build long-term, collaborative relationships with her patients. She is particularly drawn to the outpatient setting, where she can engage with the evolving narratives of her patients’ lives. She creates a warm, supportive environment where individuals feel safe, respected, and heard.

Her process begins with a comprehensive evaluation to understand each patient’s history, concerns, and goals. Treatment plans are individualized and may include medication management and psychotherapy. She integrates supportive, cognitive behavioral, psychodynamic, and mindfulness-based techniques to meet patients' evolving needs.

Dr. Brenda Y. Camacho holds the position of Staff Psychiatrist at Talkiatry. She is board-certified in Adult Psychiatry. She has been practicing for over 25 years. While having treated a wide range of adult patients, Dr. Camacho's primary focus is treating adult outpatients with mood or psychotic disorders. Her practice focuses on medication management. Typically, she offers this in conjunction with supportive or insight-oriented therapy in 30-minute follow-up visits. On occasion, Dr. Camacho will believe additional therapy is also needed and asks that you bring a therapist into your care team to provide the best outcome. Dr. Camacho completed her undergraduate studies at Tufts University. She received her medical degree from Temple University School of Medicine in Philadelphia, PA and then continued with Temple for her residency in adult psychiatry. After completing training, Dr. Camacho worked at Cooper Hospital in Camden, NJ as Associate Director of Consultation/Liaison Service and Psychiatry Residency Training and Co-Director of the Neuropsychiatry Clinic. She then began working exclusively in outpatient settings, joined NewPoint Behavioral Health Care, and served as Medical Director before and after their merge with Acenda Integrated Health.

Background  and credentials    

Dr. Christine Reyes is a bilingual Spanish-speaking adult psychiatrist with  25 years of experience. She completed her residency in Adult Psychiatry at  Saint Vincent's Hospital and Medical Center in New York City and subsequently  completed a Child Psychiatry fellowship at the University of Pennsylvania in  Philadelphia. Dr. Reyes has extensive experience practicing in outpatient and  community mental health settings.    

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Treatment approach    

Dr. Reyes provides compassionate psychiatric care using pharmacotherapy  combined with supportive psychotherapy. She specializes in treating anxiety,  depression, bipolar disorder, post-traumatic stress disorder (PTSD), and  numerous other psychiatric conditions. Additionally, Dr. Reyes emphasizes  nutritional counseling, assisting patients in achieving and maintaining a  healthy weight as part of their overall wellness plan.    

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What you can expect in a first visit    

Patients can expect a compassionate and thorough initial assessment aimed  at understanding their psychiatric symptoms, personal health goals, and  lifestyle considerations. Dr. Reyes combines medication evaluation with  supportive psychotherapy and may discuss nutritional guidance as part of a holistic  treatment plan. She prioritizes creating a supportive environment for  bilingual (English/Spanish) patients to openly discuss their mental health  concerns.    

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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.

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.