Iris Vanessa Guerrero Urena, MD

Dr. Sahadevan took an adventurous path to Talkiatry. After perhaps thinking a little too hard about Intro to Philosophy in college - "the unexamined life is not worth living” - he first used his chemistry degree to work in pharmaceutical research. He changed course, working in computer network engineering, before deciding to find a more meaningful path. He worked as an EMT, then earned a Master's in Physiology before finally landing in medical school at Ohio State. Finding a surprising interest in psychiatry, he stayed at Ohio State for residency, and then a fellowship in forensic psychiatry. He is board-certified in both Psychiatry and Forensic Psychiatry. He previously worked as a forensic psychiatrist and evaluator at Ohio's maximum-security state psychiatric facility, as an attending psychiatrist running an inpatient unit for violent or dangerous patients, performing court-ordered evaluations, writing reports, and testifying when necessary. Dr. Sahadevan has also worked as a consultation-liaison psychiatrist, performing psychiatric consults at several general hospitals in Central Ohio's largest hospital system. He found great enjoyment in teaching successive generations of residents and medical students, serving as an adjunct faculty member at Ohio State, Ohio University, Wright State, and OhioHealth Riverside Methodist Hospital. He is excited for the next chapter of his journey, exploring another area of psychiatry at Talkiatry!

Dr. Alejandra Vivas is board-certified in adult psychiatry and board-eligible in child and adolescent psychiatry. She completed her general psychiatry residency at Montefiore Medical Center and a child and adolescent fellowship at Mount Sinai School of Medicine. Dr. Vivas brings extensive experience from outpatient, emergency, and telepsychiatry settings. She has advanced training in CBT, Motivational Interviewing, and Psychodynamic Therapy. Fluent in English and Spanish, she is committed to culturally sensitive, individualized care.

Dr. Vivas fosters a warm, respectful, and professional space where patients feel seen and empowered. She values open communication and builds collaborative relationships to align treatment with each person’s values, goals, and lifestyle. Her approach is integrative and flexible, grounded in evidence-based methods to support lasting, meaningful change.

Dr. Vivas begins with a thorough evaluation to understand each patient’s history and goals. She creates customized treatment plans that may include therapy, medication, or both. Drawing on CBT, Motivational Interviewing, and Psychodynamic Therapy, she adapts care to meet evolving needs, aiming to relieve symptoms, foster resilience, and support long-term well-being.

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Dr. Ye Kyung Song is a board-certified psychiatrist with both an M.D. and a Ph.D. in medical humanities and ethics from the University of Texas Medical Branch. She completed her residency at Duke University and has experience practicing in both outpatient and inpatient settings. In addition to her clinical training, Dr. Song has pursued advanced training in several therapeutic modalities, including the Collaborative Approach to Management of Suicidality (CAMS) and Radically Open Dialectical Behavioral Therapy (RO-DBT).

Dr. Song takes a collaborative, values-driven approach to treatment, emphasizing partnership in decision-making and tailoring care to each individual’s needs. She uses medication thoughtfully and only when appropriate, considering the whole picture of a patient’s health and life. Her goal is to help patients understand the underlying reasons for their symptoms by examining patterns, conflicts, and meaning. She is committed to creating a safe and supportive environment where patients can explore their experiences openly.

During the initial appointment, Dr. Song focuses on understanding a patient’s clinical history, current concerns, and personal goals. Together with the patient, she develops an individualized treatment plan that clearly outlines areas of focus and aligns with the patient’s values and objectives. Her process emphasizes getting to the root “why” behind symptoms, while using evidence-based medicine and therapy modalities best suited for the situation. Treatment plans and medications are adjusted collaboratively over time to ensure ongoing support and progress.

Dr. Zaidi graduated residency from University Hospitals/Case Western Reserve University in 2015. After residency he worked at the Michael E. DeBakey VA Medical Center as a staff psychiatrist. He eventually took on the role of Mental Health Lead Psychiatrist and Interim Clinic Director at the Tomball VA Outpatient Clinic. Dr. Zaidi then transferred to a telepsychiatry role at VISN 15 providing mental health coverage for rural areas in Kansas, Missouri, and Illinois. Dr. Zaidi resides in Houston, Texas and enjoys spending time with his family, being outdoors, and watching/playing sports such as Football, Basketball, and Soccer.

Dr. Zaidi has over 15 years of experience in treating different mental health conditions and is currently board certified by the American Board of Psychiatry and Neurology. He enjoys getting to learn about patients and working collaboratively to provide the best treatment possible, be it medications or talk therapy. Dr. Zaidi has vast experience treating Major Depressive Disorder, Bipolar Disorder, PTSD, among many others.

Dr. Zaidi's goal when working with patients is to not come to a generic diagnosis; rather, it is to get to know about the client and try and manage their symptoms in the best way possible. Overall, the process is collaborative, and both parties need to be comfortable with the decisions moving forward.

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Dr. Georgia Gaveras holds the position of Co-Founder and Chief Medical Officer at Talkiatry. She is triple board-certified in child and adolescent psychiatry, adult psychiatry, and addiction medicine. She has been practicing for over 18 years. Dr. Gaveras's practice focuses on medication management. Typically, she offers this in conjunction with supportive or emotionally focused therapy in 30-minute follow-up visits. However, occasionally Dr. Gaveras may believe that additional therapy is also needed and ask that you bring a therapist into your care team to provide the best outcome. She received her medical degree from the University of New England College of Osteopathic Medicine in Biddeford, ME, before moving back to NY to complete her residency at the SUNY Downstate Medical Center and a fellowship in child and adolescent psychiatry at St. Luke's-Roosevelt Hospital. After completing training, she remained and worked with dually-diagnosed adolescents at the Comprehensive Rehabilitation and Education Service (CARES) before becoming the Director of Training and Education for the Mount Sinai St. Luke's and Roosevelt Hospitals. She was then the associate director of child and adolescent emergency psychiatry at Cohen Children's Medical Center before becoming the Director of the Comprehensive Psychiatric Emergency Program (CPEP) at Kings County Hospital in Brooklyn. Dr. Gaveras has held academic appointments at Columbia University College of Physicians and Surgeons, Mount Sinai Icahn School of Medicine, Touro College of Osteopathic Medicine, Zucker School of Medicine, and SUNY Downstate Medical College. In addition, she has appeared in numerous professional publications and authored several research papers. In addition to general, child, and adolescent psychiatry, Dr. Gaveras is also board-certified in addiction medicine and trained in the Eating Disorders, Compulsions and Addictions Service (EDCAS) program at the William Alanson White Institute. She completed her undergraduate studies at New York University. While having treated a wide variety of patients, her primary clinical focus has been in treating adolescents and young adults with co-occurring substance use disorders.

Shanika is a dedicated and compassionate board-certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) with over a decade of experience in the mental health field. She holds a Bachelor of Science in Nursing, a Masters in Nursing Education, and a Post-Master’s Certificate as a Family Psychiatric Nurse Practitioner. Shanika is known for her patient-centered approach, prioritizing empathy, respect, and individualized care. She is committed to building strong therapeutic relationships grounded in trust and open communication.

New patients can expect a warm, non-judgmental environment where they feel heard and supported. Shanika collaborates closely with each patient to create personalized treatment plans, helping them feel empowered in their mental health journey.

Shanika begins with a comprehensive psychiatric evaluation to understand each patient’s history, symptoms, and goals. Her treatment may include medication management, supportive therapy, and psychoeducation. She specializes in anxiety, depression, bipolar disorder, ADHD, trauma/PTSD, mood disorders, and women’s mental health. Shanika has extensive experience providing care for both adolescents and adults in outpatient settings, with a particular focus on underserved communities.

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