Dennis Valerstain, MD

Background and credentials  

Dr. Alexandra Baluna, MD, is board-certified by the American Board of  Psychiatry and Neurology. She received her medical degree from  LSUHC-Shreveport and completed her psychiatry residency training at  Montefiore/Albert-Einstein College of Medicine, where she served as chief of  the Consultation-Liaison (C/L) service. Following residency, Dr. Baluna  served as Senior Chief, during which she was honored with the Leo M. Davidoff  Award for Outstanding Achievement in the Teaching of Medical Students. Her  professional experiences include roles at Fordham University, Albert Einstein  Student Mental Health Counseling Center, and most recently, as an outpatient  psychiatrist at Maimonides Medical Center, where she enjoyed teaching and  supervising residents.  

Treatment approach  

Dr. Baluna emphasizes creating a warm, empathic, and nonjudgmental  therapeutic environment. She collaborates closely with patients to develop  personalized treatment plans that consider cultural, biological,  psychological, and social factors. With a strong interest in psychotherapy,  she frequently employs ego-supportive and insight-oriented therapy techniques  during follow-up sessions.  

What you can expect in a first visit    

During an initial visit, patients can expect a welcoming and supportive  atmosphere where Dr. Baluna conducts a comprehensive assessment. This  involves exploring the patient's history, current challenges, and individual  circumstances. The goal of the first session is to collaboratively build an  individualized treatment plan tailored specifically to the patient's unique  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 speciualize in  medication management and collaborate with you on a treatment plan that fits  your needs and comfort level.

Rebecca Kostopoulos, PMHNP, is a board-certified psychiatric nurse practitioner committed to helping individuals facing mental health challenges lead full and balanced lives.

Her practice primarily focuses on medication management, often combined with supportive or emotionally focused therapy during 30-minute follow-up visits. When appropriate, Rebecca may recommend involving an additional therapist to ensure the most effective and comprehensive care.

She earned her Master of Science in Nursing with a specialization in psychiatry from Columbia University and her Bachelor of Science in Nursing from Boston College. Her training includes psychiatric diagnosis, medication management, and both psychodynamic and cognitive-behavioral therapies.

With over a decade of experience, Rebecca has evaluated and treated adults in a variety of clinical settings. Her previous roles include working at Elmhurst Hospital’s Comprehensive Psychiatric Emergency Program, Gracie Square Hospital’s inpatient unit, as well as in community health centers and skilled nursing facilities.

As a nurse practitioner, Rebecca believes that mental health is just as vital as physical health. She values the therapeutic relationship and approaches treatment with empathy and collaboration, ensuring that each patient receives personalized and compassionate care.

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Dr. Ritchie is trained in both adult and child & adolescent psychiatry, with a focus on the diagnosis and treatment of depressive disorders, anxiety disorders, trauma- and stressor-related disorders, and ADHD.  He received his bachelor's degree in biology with a minor in French, from The University of Central Florida. Dr. Ritchie completed medical school at Campbell University School of Osteopathic Medicine. Following medical school, he completed General psychiatry residency and Child and Adolescent Psychiatry Fellowship at Texas Tech University Health Sciences Center. His professional experiences include working in inpatient psychiatric hospitals, consult-liaison psychiatry, outpatient clinics, intensive outpatient programs (IOP), partial hospitalization programs (PHP), and emergency rooms. This broad range of experience allows him to provide comprehensive, individualized care to patients at all stages of life.

Dr. Ritchie emphasizes a holistic approach, combining medication management and psychotherapy. He utilizes principles from Cognitive Behavioral Therapy (CBT), Acceptance and Commitment Therapy (ACT), and supportive psychotherapy This method is supported by research indicating improved patient outcomes.

Patients can anticipate a thorough initial evaluation during their first visit with Dr. Ritchie. He conducts a comprehensive assessment to understand the patient's symptoms, history, and personal circumstances. This session sets the foundation for collaboratively developing an individualized treatment plan focused on the patient's specific needs and goals.

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Dr. Santos is a highly experienced, Board-Certified Adult Psychiatrist with over 10 years of clinical experience in English and Spanish. He graduated from the Universidad Autónoma de Guadalajara School of Medicine and completed a rigorous 4-year psychiatric residency training in NYC at Lincoln Medical and Mental Health Center.

In his residency and post-residency practice, Dr. Santos has provided high-quality care to culturally diverse communities, and has extensive experience helping patients with Depression, Anxiety, ADHD, and other mental health conditions. He understands that choosing and seeing a psychiatrist can be stressful and is committed to providing a welcoming and non-judgmental environment where patients can feel free to discuss their concerns.

Dr. Santos takes a personalized approach to treatment, considering the unique psychology, biology, and lifestyle of each individual patient when determining the best course of action. His practice focuses on medication management in conjunction with supportive therapy, and he conducts follow-up visits in 30-minute increments. He believes that the most successful treatments integrate physical health, therapy, mindfulness, and medication, when necessary, to provide the most effective solutions for his patients.

If you are looking for a compassionate and experienced psychiatrist who is fluent in both English and Spanish, schedule an appointment with Dr. Santos today. His dedication to his patients and his extensive experience makes him an excellent choice for those seeking to improve their mental health.

Dr. Alexandra ("Sasha”) Blaes is a board-certified psychiatrist. Before joining Talkiatry, she practiced consult-liaison psychiatry, seeing medically ill patients with psychiatric problems at the Department of Veterans Affairs, where she also treated veterans in nursing homes. Dr. Blaes graduated from New York University with a B.A. in philosophy and photography and worked in nonprofit marketing in New York before deciding she wanted to pursue a life in medicine. Following a post-baccalaureate, pre-medical program at Columbia University, Dr. Blaes completed medical school at The University of Maryland, followed by a psychiatry residency at The Johns Hopkins Hospital. While at Johns Hopkins, she mastered clinical assessment and treatment of general psychiatric problems. She also received specialized training in eating disorders, addiction, reproductive psychiatry, chronic pain, and geriatric psychiatry, an interest she pursued further with a fellowship at University of Pittsburgh Medical Center. In fellowship and in her subsequent experience at the VA, she developed expertise in caring for the difficulties that can accompany aging, including depression, anxiety, and memory loss, as well as the stress of medical illness. Dr. Blaes' practice focuses on medication management. She works to foster a safe and collaborative space in which patients can address psychiatric illness and other barriers holding them back from the lives they want to lead. Typically, she offers appointments for medication management coupled with supportive or emotionally focused therapy in 30-minute sessions. When Dr. Blaes feels that additional therapy is needed, she will suggest inviting a therapist to join the team for additional support and guidance. She welcomes collaborations with other clinicians, be they therapists or other physicians caring for her patients. She strives to build strong therapeutic relationships that help patients grow and meet their goals - whatever their situation, challenge, or life stage. Dr. Blaes welcomes patients from all walks of life and cultural backgrounds and is LGBTQ+ friendly. In addition to her background in geriatrics, she has experience working with peripartum women and enjoys working with patients navigating major life changes.

Dr. Erwin Ting is a board-certified adult psychiatrist with over 20 years of outpatient experience caring for a diverse patient population. He completed his psychiatry residency at New York University Medical Center and a fellowship at Mount Sinai Beth Israel Medical Center in New York. Dr. Ting is dedicated to helping patients achieve meaningful and sustainable improvements in their mental health.

Dr. Ting practices in a collaborative, flexible, and nonjudgmental manner. He values patient autonomy and works to create a supportive environment where individuals feel heard and respected. He is comfortable coordinating care with therapists or other providers when a team-based approach is needed to achieve the best possible outcomes.

Dr. Ting offers medication management in tandem with therapy, tailoring treatment plans to each patient’s unique needs and goals. He emphasizes thoughtful evaluation, ongoing dialogue, and regular follow-up to support recovery and long-term stability.