Lisa Oliveri, MD

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. Carmen Orellana is a Staff Psychiatrist at Talkiatry who has been in practice for over 6 years, both in the U.S. and abroad. She is double board-certified in child and adolescent psychiatry and adult psychiatry. Dr. Orellana's practice focuses on medication management. She strives to provide exceptional medical care and has extensive experience in treating persons with diverse behavioral disorders and backgrounds. Dr.Orellana involves her patients in all decisions about their health, and provides care that is respectful of patient preferences, needs, and values. Typically, she would recommend evidence-based treatments to her patients and may, occasionally, believe that concurrent therapy is also needed. She would ask that you bring a therapist into your care team to provide the best outcome. Dr.Orellana received her medical degree from Universidad Evang�lica de El Salvador. Dr. Orellana completed a residency in Psychiatry and a fellowship in child and adolescent psychiatry at the Southern University School of Medicine in Springfield, Illinois. After completing her training, Dr. Orellana remained in the school, where she worked as an Assistant Professor of Child and Adolescent Psychiatry, supervising and teaching medical students, residents, and fellows, and treating patients with various psychiatric conditions. Dr. Orellana has experience in treating treatment-resistant mood disorders with electroconvulsive therapy (ECT) and transcranial magnetic stimulation (TMS).‍

Dr. Mandel received his Bachelor of Arts and Doctor of Medicine degrees from the University of Pennsylvania. He completed his Residency in Psychiatry at Mount Sinai Medical Center in Manhattan. He has been board certified in psychiatry since 2001 and is a Life Fellow of the American Psychiatric Association. He has held numerous clinical and academic appointments including serving as Chairperson of Psychiatry at Huntington Hospital in Huntington, New York, and Assistant Professor of Psychiatry at Hofstra North Shore-LIJ School of Medicine.

Dr. Mandel has over 25 years of clinical experience treating all mental health conditions. He has a strong interest in mood and anxiety disorders, including work-related anxiety. He authored a section on the pharmacology of social anxiety in the book Work Makes Me Nervous. Dr. Mandel also has expertise working with clients diagnosed with borderline personality disorder. He has lectured on the pharmacologic management of this condition, including a presentation at the NIMH International Think Tank for the More Effective Treatment of Borderline Personality Disorder.

Dr. Mandel continually seeks to streamline complex medication regimens. He has completed a fellowship in integrative psychiatry and carefully considers the potential contributions of lifestyle and nutrition to overall mental health and well-being. By taking an eclectic approach, Dr. Mandel is able to achieve the best possible outcome for all whom he is privileged to serve.

Dr. Duy Tran is a board-certified adult psychiatrist. He received his medical doctorate degree from the University of Texas Southwestern Medical School and completed his residency training in general psychiatry at the University of Michigan. Dr. Tran aims to provide mental health care that helps patients live more fulfilling lives. In his training, Dr. Tran gained extensive experience treating psychiatric disorders in diverse populations, including college students, LGBTQ+ individuals, perinatal women, veterans, and those with socioeconomic disadvantages. He has worked with experts on cases of treatment-resistant depression and provided consultations for patients considering procedural interventions, such as transcranial magnetic stimulation (TMS), electroconvulsive therapy (ECT), and ketamine infusion therapy. Although Dr. Tran's practice primarily focuses on medication management, he uses a holistic approach in developing individualized treatment plans. He typically incorporates elements of various psychotherapy modalities, including supportive, cognitive behavioral (CBT), dialectical behavioral (DBT), and insight-oriented therapy, in 30- or 45-minute follow-up visits. Occasionally, Dr. Tran may believe that more intensive therapy is needed and recommend that you bring a dedicated therapist into your care team for an optimal outcome.

Dr. Tobias Murphy is a psychiatrist with Talkiatry who is licensed to provide care in the states of Ohio, West Virginia, and New York. He completed medical school and psychiatry residency at Marshall University's School of Medicine. He has additional training in neuropsychiatry and geriatric psychiatry. During his training, Dr. Murphy was actively involved in teaching medical students and residents. His most frequent lectures included LGBT and transgender mental health. He is a member of the American Psychiatric Association, the American Association of Gay and Lesbian Psychiatrists, the Gay and Lesbian Medical Association, the World Professional Association for Transgender Health. He was inducted into the Gold Humanism Honor Society and given awards for Inclusion and Advocacy as well as Honors in Community Service during training. He has published papers, presented at conferences, and served as an ad-hoc reviewer for medical journals. Dr. Murphy approaches medication management through the lens of compassionate listening and psychotherapy, seeking to reduce the stigma of mental illness and put patients at ease during their visits. He has experience treating a variety of conditions, including bipolar disorder, depression, OCD, PTSD, ADHD, and anxiety. He enjoys working with a diverse population of patients providing culturally informed care. Follow-up patient visits will include both supportive therapy and medication management during 30-minute encounters.

Dr. Mayra Valdivia Carlisle is a bilingual Spanish and English-speaking board-certified Adult Psychiatrist and Child & Adolescent Psychiatrist. She earned her master's degree in public health and her medical degree from Oklahoma State University Center for Health Sciences. She went on to complete her residency training in Adult Psychiatry at the University of Texas Health Science Center in San Antonio and subsequently completed her fellowship in Child and Adolescent Psychiatry. She was awarded the Excellence in Public Health Award by the U.S. Public Health Service and Surgeon General for her work addressing health disparities in healthcare. Dr. Carlisle has extensive experience in outpatient and community mental health settings.

Dr. Carlisle provides patient-centered and compassionate psychiatric care combining medication management, psychotherapeutic methods, and lifestyle modifications to create a unique treatment plan. She recognizes that each person benefits from a personalized and holistic approach to healing. Dr. Carlisle specializes in treating diverse psychiatric conditions including ADHD, anxiety disorders, depression, and post-traumatic stress disorder in children, adolescents, and adults.

During an initial visit one can expect a comprehensive evaluation aimed at understanding individual mental health history, specific concerns, and overall treatment goals. Dr. Carlisle practices a holistic approach to treating mental disorders. This is done through an individualized plan for each patient with careful consideration to medication management, therapy techniques, and lifestyle modifications. Patients can expect an empathetic and collaborative environment focused on their personal experiences and goals.

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