Cassandra Garcia-Lozano, LPC

Elizabeth Vah, LCSW, graduated from the University of Texas at Austin in 2008 with a master’s degree in clinical social work. She completed her internship at Seton Medical Center, gaining experience in the emergency room and specialty clinics. Elizabeth has worked in both inpatient and outpatient settings and has training in DBT, CBT, mindfulness, solution-focused, and person-centered counseling.

Elizabeth takes a collaborative approach, partnering with patients to clarify goals and create a roadmap for growth. She has supported individuals from diverse backgrounds facing anxiety, depression, grief, life transitions, interpersonal challenges, and severe mental illness. Her approach blends evidence-based therapies with individualized care, emphasizing a trusting, supportive relationship and a safe, nonjudgmental environment.

In the first session, Elizabeth creates a welcoming space to discuss challenges, goals, and personal history, reviewing confidentiality and treatment structure. Together, she and the patient develop a personalized plan. Ongoing sessions focus on exploring thoughts and feelings, identifying patterns, and practicing skills to support meaningful change, with regular goal review and reflection on progress.

Tamara Lazenby, MD is a board-certified psychiatrist with more than 20 years of clinical and academic experience in emergency mental health, disaster response, and trauma-focused care. She earned her undergraduate degree at George Mason University and completed her medical degree at Eastern Virginia Medical School. After the September 11th attacks, Dr. Lazenby trained in psychiatry at New York Medical College’s Saint Vincent’s Hospital, specializing in emergency and trauma psychiatry.

She previously served as Associate Director of Wellness & Emergency Response Services at New York University’s Student Health Center, leading a team that cared for more than 50,000 global NYU students. Dr. Lazenby also previously served as Staff Psychiatrist and Team Lead for the Combat PTSD Clinical Team at the Hampton VA Medical Center, providing care for veterans with service-related trauma and implementing National VA Standards of Care.

Dr. Lazenby believes healing happens when mind, body, and spirit are aligned. She creates a compassionate and collaborative environment where patients feel deeply heard and empowered in their own care. Her approach blends conventional psychiatric treatment with nutrition, mindfulness, movement, and stress-reduction strategies to support long-term mental wellness.  She values authenticity, open communication, and shared decision-making, empowering patients to build resilience and restore balance in their lives.

She begins with a comprehensive assessment exploring medical, psychological, and lifestyle factors that influence mental health. Treatment plans are personalized and may include psychotherapy, targeted laboratory testing, lifestyle modifications, supplements, and medication when appropriate. Dr. Lazenby works closely with patients to restore balance, resilience, and overall well-being through a truly integrative approach. Regular collaboration and feedback, helping patients heal, grow, and thrive.

Dr. Tetyana Tarnavsky is a board-certified psychiatrist trained in Adult Psychiatry. She attended Dnipropetrovsk State Medical Academy in Ukraine where she received her M.D., M.S. and Ph.D. degrees in Psychiatry. Dr. Tarnavsky completed her residency at Harvard South Shore Psychiatry Residency Training Program in MA, where she was elected chief resident. Dr. Tarnavsky has an extensive research experience in Ukraine and the USA. She had studied computer addiction for her dissertation; had multiple abstracts and presentations; published several articles in peer-reviewed psychiatric journals as well as a book entitled Computer Addiction: Formation, Diagnosis, Correction and Prophylaxis. She has helped organize international conferences with the goal of improving access to and quality of healthcare in Dnipropetrovsk, Ukraine, and providing a national model for health care reform. Dr. Tarnavsky has worked with a variety of patients with diverse backgrounds in a Community Health Center and in the Partial Hospitalization Program as well as supervised medical students, psychiatry residents, and nurse practitioners. She has been a lecturer on psychiatry at Harvard Medical School and was involved in the training of psychiatry residents in the Harvard South Shore Psychiatry Training Program. Her primary focus has been on treating adults with depression, anxiety, post traumatic stress disorder, adjustment disorder, ADHD and other disorders. Dr. Tarnavsky strives to provide quality and compassionate treatment to individuals and their families.‍

Dr. Jaffarzad is a board eligible adult psychiatrist who completed her undergraduate training at the University of Texas at Austin and earned her medical degree at the American University of the Caribbean. She completed her psychiatry residency at Louisiana State University Our Lady of the Lake Psychiatry Residency Program. After completing residency, she worked in an outpatient setting and provided consultation liaison services at Our Lady of the Lake Hospital. Moreover, she held volunteer academic positions supervising and instructing residents and medical students. She has experience treating culturally diverse patient populations with a variety of mental health conditions. Dr. Jaffarzad primarily offers medication management in conjunction with supportive therapy during follow-up visits. She values the importance of open communication and a strong doctor-patient therapeutic alliance.

Dr. Lee is a board-certified psychiatrist who specializes in adult psychiatry and minority mental health. He is a graduate of Morehouse College and later received his medical degree from Meharry Medical College in Nashville, TN. After graduating from Meharry, he completed his psychiatry residency at the University of South Carolina/ Palmetto Health in Columbia, SC and a forensic psychiatry fellowship at Tulane University. After completing his training, he entered private practice in Rock Hill, SC and served the community for 11+ years. During that time, he also served as Staff Psychiatrist at Winthrop University. Prior to joining Talkiatry, Dr. Lee served as an Attending Psychiatrist and Medical Director of an inpatient psychiatric unit. Throughout his professional career, he has remained passionate about educating individuals about sustaining better mental health and eradicating the stigma of mental illness. Dr. Lee brings a vast array of knowledge to Talkiatry. He has experience treating various psychiatric disorders including depression, anxiety, bipolar disorder and ADHD. His approach focuses on evidence-based medication management and incorporates supportive therapy techniques as well as psychoeducation to address the presenting issues in a compassionate and competent manner. If additional therapy is needed, Dr. Lee may recommend that a therapist is part of the treatment team.

Background and credentials

Dr. Nilesh Tannu is a board-certified psychiatrist by the American Board of Psychiatry and Neurology. He earned his medical degree from B.J. Medical College in Pune and completed his adult psychiatry residency at the University of Texas Medical School at Houston, where he served as chief resident. During his training, he received awards from the Society of Biological Psychiatry, the American Academy of Addiction Psychiatry, and the American Psychiatric Institute for Research and Education. He has been practicing General Psychiatry and Consultation-Liaison Psychiatry for the past seven years at Texas Medical Center in Houston, Texas. Additionally, he has served as an assistant professor of psychiatry at the Texas Medical Center, working at UT Physicians Clinics and Memorial Hermann Hospital. He is also a member of the Editorial Board for BMC Genomics Journal.

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Treatment approach

Dr. Tannu follows the bio-psycho-social model to provide evidence-based psychopharmacologic treatment. He integrates supportive therapy and cognitive-behavioral therapy (CBT) modalities into his practice to create personalized and comprehensive treatment plans. He is committed to mental health care, education, and helping patients achieve optimal functioning in their personal and professional lives. His clinical expertise includes ADHD, anxiety disorders, depressive disorders, bipolar disorder, psychotic disorders, insomnia, eating disorders, and complex medical comorbidities.

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What you can expect in a first visit

During the first visit, patients can expect a comprehensive assessment where Dr. Tannu takes the time to understand their symptoms, treatment history, and personal goals. He employs a collaborative approach to develop a tailored treatment plan that may include medication management and therapy interventions. His focus is on evidence-based care, ensuring that patients receive treatments that are scientifically backed and aligned with their individual needs.

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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.

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