Kerstin Asquith, MD

Dr. Kira Posteraro is double board-certified in Adult and Addiction Psychiatry and has over 10 years of clinical experience. She completed her General Adult Psychiatry Residency at Allegheny General Hospital in Pittsburgh, PA, followed by a fellowship in Addiction Psychiatry at Beth Israel Medical Center in New York, NY.

Dr. Posteraro’s career has included serving as Director of Psychiatric Services at an addiction treatment center in Pittsburgh, PA, where she provided care across the full continuum of substance use disorder treatment—including residential, acute PHP, IOP, outpatient, and aftercare services. She later held the role of Section Chief Psychiatrist for the Center for Treatment of Addictive Disorders at VA Pittsburgh Healthcare System, offering both residential and outpatient services and acting as Medical Director for the SAMHSA-certified Opioid Treatment Program. Most recently, she served as Chief of Psychiatry for the Behavioral Health Service Line at VA Pittsburgh, where she had the honor of caring for our nation’s Veterans.

While her clinical expertise centers on the diagnosis and treatment of substance use disorders, Dr. Posteraro also has extensive experience treating a wide range of psychiatric conditions, including depressive and bipolar spectrum disorders, anxiety disorders, and trauma-related disorders.

Dr. Posteraro uses a collaborative, supportive approach to care, incorporating motivational interviewing to help guide patients on their journey to wellness. She integrates holistic strategies alongside medication management and is dedicated to meeting patients where they are in treatment to build individualized, effective recovery plans.

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Dr. Nathan Schulz attended the Ohio State University College of Medicine where he received his degree before completing a residency in psychiatry at the University of Illinois, Chicago. After several years working with veterans at the Jesse Brown VA in Chicago, he returned to his home state of Iowa in 2022. Since then, he has continued to work with a wide variety of clients and conditions in both inpatient and outpatient settings, including at the University of Iowa and Clive Behavioral Health hospital.

Dr. Schulz values open, honest, and ongoing dialogue about how mental health treatment can improve wellbeing and lead to healing. Over time, he tailors treatment recommendations based on individual needs, which may include medication, therapy, lifestyle changes, or other approaches. He avoids a one-size-fits-all model and creates an environment where patients feel respected, understood, and supported as unique individuals.

In the first meeting, Dr. Schulz works to understand each patient’s goals, experiences, and preferences. Some arrive knowing what they want, while others are new to exploring mental health challenges. His goal is to meet patients where they are and adjust treatment focus as needs evolve. He emphasizes collaborative decision-making, clearly discussing treatment options, pros and cons, and next steps, while ensuring patients feel informed and empowered throughout care.

Dr. Zeynep Altun is board-certified in Psychiatry and holds a Ph.D. in Neuroscience. Dr. Altun graduated cum laude from Istanbul University, Istanbul Medical School. She completed her residency training in Neurology and is Turkish board-certified in clinical Neurology. Subsequently, she moved to the U.S. and finished her Ph.D. in cellular Neuroscience at Cornell University Graduate School of Medical Sciences. Dr. Altun completed her psychiatry residency training at Albert Einstein College of Medicine, Department of Psychiatry and after, her clinical fellowship in Comprehensive Psychiatric Emergency Program at Columbia University Medical College, New York Presbyterian Hospital. Dr. Altun has practiced in various settings including Bellevue Hospital, New York Presbyterian Hospital, Columbia Doctors Faculty Practice Office, Mount Sinai West and Mount Sinai Morningside Hospitals. Dr. Altun has held various academic appointments at New York University School of Medicine Department of Psychiatry; New York Presbyterian Hospital-Columbia University Medical College Department of Psychiatry; New York State Psychiatric Institute and Mount Sinai School of Medicine Department of Psychiatry. She spent most of her professional career supervising and teaching medical students, psychiatry residents and nurse practitioners. As an adult psychiatrist, Dr. Altun has extensive theoretical knowledge of the nervous system and its disorders and more than 10 years of experience in treating various mental illnesses including mood disorders, anxiety disorders, psychotic disorders, autism-spectrum and neuropsychiatric disorders, psychiatric emergencies and crisis management as well as cognitive behavioral and supportive psychotherapy. In Columbia Doctors, she collaborated closely with the Lieber Recovery Clinic, treating young adults with various mental illnesses. The philosophy of her practice is to collaborate with patients and work together with them so that they can lead symptom-free, productive, and stable lives.

Dr. Faizan Syed is a board-certified attending psychiatrist who graduated from St. George's University School of Medicine in 2012. He completed his residency in adult psychiatry at Creedmoor Psychiatric Center, an affiliate of Columbia University, in June 2016 .Dr. Syed was born in Karachi, Pakistan, and has lived transnationally in the United States, the Caribbean, the United Kingdom, and the Middle East throughout his life. He is currently based in Queens, NY, and alongside his professional development in his career as a psychiatrist, he has also worked to develop himself personally through writing. As a poet, essayist, and author, he has been published numerous times, and he maintains connections with his community through his participation in a group known as the Queens Poetic Alchemy Collective. He has spoken out publicly against the cultural stigma against mental health that has become a barrier to seeking and finding help. He has also been featured on Humans of New York. Dr. Syed believes strongly in the power and importance of psychotherapy as part of the therapeutic process. As such, he integrates individualized psychotherapy for each patient he sees and tailors various techniques to suit each patient's needs. He believes in an integrative, holistic approach that borrows from and blends various schools of psychology, philosophy, and neuroscience, including mindfulness, existentialism, cognitive-behavioral therapy, dialectical therapy, psychodynamics, genetics, and psychopharmacology. In addition, he is a great believer in the therapeutic power of the arts, whether it is visual arts, music, bibliotherapy, or expressive writing. Dr. Syed focuses on exploring the role of meaning in every patient's life so they can define and fulfill their potential in many areas of life. He has experience working with patients of all ages who have struggled with trauma, relationship or attachment issues, bipolar disorder, depression, anxiety, panic attacks, psychosis, and personality disorders.

Dr. Megan Crochet is board certified in Adult Psychiatry and has completed a fellowship in child and adolescent Psychiatry. Dr. Crochet attended medical school at Drexel University College of Medicine and completed her training at Mount Sinai School of Medicine, followed by Tulane University School of Medicine, where she was a chief resident. Dr. Crochet provides a therapeutic medication management visit, which incorporates therapeutic techniques tailored to the individual patient needs while adjusting medication doses. Her goal is to help patients manage their symptoms while working towards, over time, uncovering the root causes. This comprehensive process helps to empower her patients and provides hope and acceptance of their psychiatric challenges. If indicated, Dr. Crochet may believe that additional therapy is also needed and recommend that you bring a therapist into your care team to provide the best outcome. Dr. Crochet has worked in hospital systems, private practice, and most recently telemedicine. When not practicing, she enjoys all things water, cooking and spending time with her daughter and dog.

Dr. Tony Tu is a board certified adult psychiatrist who emphasizes patient education and a psychodynamic approach to outpatient psychiatry. His passion for empowering patients with knowledge stems from his academic experience in psychiatry residency training. Dr. Tu's practice focuses on blending medication management together with psychotherapy. He also prioritizes collaboration with your therapist and encourages working together as a team. Dr. Tu is a graduate of the University of Chicago Pritzker School of Medicine where he completed an MD and PhD combined program which helped develop his "doctors as teachers” style of practice. Dr. Tu completed his psychiatry residency training at Loyola University Medical Center in Illinois. Dr. Tu served as an Associate Program Director of Loyola's Psychiatry residency training program for two years, and now maintains an Affiliate Assistant Professor of Psychiatry role with Loyola. He continues to contribute to residency training, as well as mentorship of medical students and psychology externs. Over the years, Dr. Tu has received several awards that demonstrate his affinity for teaching, including the Educator of the Year Award in 2022 from the Loyola Psychiatry Residency Program. Areas of specialization include psychopharmacology, patient-centered medicine, and combination treatment of psychiatry and psychotherapy. Dr. Tu understands that medications are not the end-all-be-all of treatment, but just the beginning. For trauma and acute stress, he understands that the journey starts at the tip of the iceberg, with much to explore as you feel more ready.