Tetyana Tarnavsky, MD

Background and credentials

Dr. Nereida Gonzalez-Berrios is a general psychiatrist fluent in English and Spanish. She earned her bachelor’s degree in Microbiology from the University of Puerto Rico and her medical doctorate from Ponce School of Medicine (now Ponce Health Sciences University). She completed her General Psychiatry Training Program at the University of Puerto Rico Medical Sciences Campus, graduating in 2008. After practicing privately in Puerto Rico, she relocated to Texas, where she worked for over five years at the Michael E. DeBakey VA Health System, providing mental health care to veterans. She has also gained extensive experience in telemedicine, working both within the VA system and as a locum tenens provider.

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Treatment approach

Dr. Gonzalez-Berrios has extensive experience treating a wide range of psychiatric conditions, including mood disorders, anxiety disorders, psychotic disorders, intellectual impairment, ADHD, eating disorders, PTSD, and personality disorders. She integrates traditional psychiatric treatment with a holistic wellness approach, drawing on her background as a motivational speaker, wellness coach, certified personal fitness trainer, nutrition coach, and weight-loss specialist. Her approach emphasizes improving overall mental and physical well-being through personalized treatment plans that incorporate psychiatric care, wellness strategies, and lifestyle modifications.

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What you can expect in a first visit

Patients can expect a comprehensive psychiatric evaluation where Dr. Gonzalez-Berrios carefully assesses their symptoms, medical history, and personal wellness goals. She takes a collaborative and patient-centered approach, ensuring that treatment is tailored to each individual’s mental and physical health needs. As an experienced telemedicine provider, she offers accessible and flexible mental health care, combining medication management and holistic wellness strategies to help patients achieve lasting well-being.

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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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Dr. Mary Lou Gutierrez is board-certified in both Child & Adolescent Psychiatry and General Psychiatry, with over 20 years of clinical experience. She earned her M.D. from Loyola University Medical Center, where she also completed her residency in Adult Psychiatry. She pursued fellowship training in Child and Adolescent Psychiatry at Northwestern University’s Children’s Memorial Hospital. Her past roles include Medical Director for Compass Health Center’s Under 18 Program and Attending Psychiatrist at Loyola. She has been recognized as a “Top Doctor” in Child and Adolescent Psychiatry by US News and World Report and Negocios Now.

Dr. Gutierrez fosters a warm, collaborative environment where patients and families feel supported and understood. She emphasizes open communication and works closely with patients to define meaningful, realistic treatment goals. Her holistic, family-centered approach integrates medication management, therapy, and psychoeducation with a deep commitment to cultural sensitivity and compassionate care.

Dr. Gutierrez begins by learning each patient’s personal story, clinical history, and goals through a comprehensive evaluation. She creates individualized, evidence-based treatment plans tailored to each child’s unique needs and family context. She continuously collaborates with patients, families, and care teams to ensure treatment remains effective, combining psychotherapy, medication management, and coordination with other providers and resources.

Dr. Ismail is double board-certified by the American Board of Psychiatry and Neurology in both Adult Psychiatry and Child and Adolescent Psychiatry. She earned her medical degree from Cairo University, where she also completed her neurology residency at Cairo University Hospitals. Following this, she pursued psychiatric training at New York Medical College at St. Vincent’s Hospitals, where she was appointed Chief Resident and recognized as Resident of the Year.

Dr. Ismail further specialized with a fellowship in Child and Adolescent Psychiatry at UMDNJ/Rutgers Robert Wood Johnson Medical School. Her career includes multiple leadership roles, notably serving as Chief of the Child and Adolescent Partial Hospital Programs (PHP) at Rutgers University in Newark, NJ, where she provided direct care to young patients. She has also held Medical Director positions across various clinical settings, including child and adolescent inpatient units, outpatient programs, and intensive outpatient services for both adolescents and adults with mental health and co-occurring substance use disorders.

An active educator, Dr. Ismail has been a teaching faculty member, delivering lectures and providing supervision and evaluations for medical residents and child and adolescent psychiatry fellows. Her academic contributions extend to research, where she has served as a principal investigator on multiple studies.

Throughout her career in leadership and teaching, Dr. Ismail maintained an integrative private practice in New Jersey, serving residents of the NJ and NY metropolitan areas before relocating to North Carolina.

Dr. Ismail is passionate about integrative medicine, which combines evidence-based alternative therapies with conventional treatments to optimize outcomes. Her approach focuses on promoting overall wellness, keeping both the body and mind in harmony.

During the diagnostic evaluation, Dr. Ismail will review your medical history and past treatments to develop a comprehensive, personalized treatment plan that prioritizes your overall wellness. In addition to medication management, she incorporates supportive, cognitive, or psychodynamic psychotherapy during follow-up visits, as time allows. When appropriate, she may also recommend referrals to specialized psychotherapists to address your individual needs as part of a holistic treatment approach.

Dr. Stacey DiMartino is a board-certified psychiatrist with over 20 years of experience. She received her undergraduate education at the University of Rochester and her medical degree from the State University of New York at Buffalo, where she also completed her residency.

Her approach is individualized and focuses on collaborative care with shared decision-making. Dr. DiMartino specializes in the treatment of adults with a wide range of mental health concerns, including posttraumatic stress disorder, depressive disorders, anxiety disorders, and bipolar disorders. She has enjoyed working with veterans for over 19 years at the VA Healthcare System.

Her style of practice incorporates medication management and supportive psychotherapy with an emphasis on whole health wellness. She will provide a thorough assessment of your mental health needs and formulate a comprehensive treatment plan. She assists with bolstering insight, enhancing intrinsic coping skills, and attaining life goals. Dr. DiMartino enjoys spending time with family, including her rescue dogs, who may sometimes make a special guest appearance during appointments. She looks forward to meeting with you and working together on achieving a fulfilling, well-balanced life.

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Dr. Tammara Davis is a board-certified adult psychiatrist with over 15 years of experience treating patients across inpatient, outpatient, emergency, and telepsychiatry settings. She earned her medical degree from the University of Tennessee Health Science Center, completed her psychiatry residency at St. Elizabeths Hospital in Washington, DC, and holds a B.S. from Xavier University of Louisiana.

Dr. Davis previously served as a Primary Care–Mental Health Integration psychiatrist at the Veterans Health Administration, where she helped expand access to care in community-based clinics. She is an active member of the Black Psychiatrists of America, where she advances advocacy and equity in mental health care. While she has treated a wide variety of patients from all walks of life, her clinical focus has been on improving access to quality mental healthcare for historically marginalized communities.

Dr. Davis specializes in mood and anxiety disorders, including depression, PTSD, and perinatal mental health. Her approach is holistic, integrative, and patient-centered—grounded in cultural humility and collaborative care. She does not prescribe benzodiazepines, focusing instead on evidence-based strategies that support long-term wellness. While treating a wide variety of patients, Dr. Davis’ clinical focus has been on adults from marginalized and/or minoritized communities.

Dr. Davis begins care with a consultation to ensure a strong fit and shared treatment goals. Dr. Davis is committed to creating a safe, trusting space where patients feel empowered and in control of their healing. She recognizes that not all patients require medication and integrates culturally affirming support when therapy and education are more appropriate.

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Dr. Holly Shiao is a psychiatrist who has worked extensively with medically complex patients, including a special focus in psycho-oncology with cancer patients. She is double board-certified in Consultation-Liaison Psychiatry and Adult Psychiatry. She has been practicing for over 7 years. Before Talkiatry, Dr. Shiao worked as an Assistant Professor at the University of Washington and Fred Hutchinson Cancer Center. She also worked as an Assistant Professor and was Director of Emergency Psychiatry at the University of Chicago. She has presented nationally at the Academy of Consultation-Liaison Psychiatry and written a book chapter about psycho-oncology. Dr. Shiao attended medical school at John P. and Kathrine G. McGovern Medical School at the University of Texas Health Science Center at Houston. She then completed an Adult Psychiatry residency at the University of Texas Medical Branch at Galveston, followed by a Consultation-Liaison fellowship at Dell Medical School at the University of Texas at Austin. Dr. Shiao is interested in the mind-body connection in overall emotional and mental well-being. She likes to integrate therapy modalities, such as cognitive behavioral therapy, supportive therapy, mindfulness and meditation with medication management to optimize a patient's mental health.