Nicole Parrish, MD

Dr. Thomas O’Brien holds a Bachelor of Science degree from the University of Wisconsin–Madison and earned his medical degree from Midwestern University Chicago College of Osteopathic Medicine. He completed his psychiatry residency at Loyola University Medical Center. Dr. O’Brien has experience practicing across outpatient, PHP, IOP, and inpatient settings.

He strives to create a supportive environment where patients feel heard, respected, and understood. His approach emphasizes a holistic, whole-person method to healing, guided by the patient’s own goals and values. Dr. O’Brien integrates psychotherapy with medication management, drawing on his background in psychodynamic psychopharmacology and acceptance and commitment therapy.

Dr. O’Brien focuses on understanding each patient as a whole to create individualized treatment plans. This begins with a comprehensive history during the initial session to identify biopsychosocial factors. Treatment is then tailored to align with the patient’s unique goals and values, promoting meaningful progress.

Cherie Tubeileh, PMHNP-BC, is a compassionate Psychiatric Nurse Practitioner dedicated to providing personalized, evidence-based mental health care. Cherie earned her master’s degree from the Medical College of Ohio and her post-master’s certification from Rush University. Outside of work, she enjoys hiking, yoga, and meditation, reinforcing her belief in the importance of balance and self-care.

With expertise in diagnosing and treating various conditions, she empowers patients through psychopharmacology and therapeutic interventions. Cherie embraces a holistic approach, recognizing the vital connection between mind, body, and spirit in the journey to mental wellness.

Her approach integrates evidence-based practices with a holistic understanding of everyone’s unique needs, ensuring personalized and effective care. Cherie has worked extensively with diverse populations, including individuals managing anxiety, depression, trauma, and mood disorders. She is skilled in psychopharmacology, therapeutic interventions, and patient education, fostering a supportive environment that empowers individuals on their journey to wellness.

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Dr. Connie Hsiao is a double board-certified Adult and Child & Adolescent Psychiatrist. She earned her medical degree from Texas A&M College of Medicine, completed her Adult Psychiatry Residency at UT Health San Antonio, and pursued Child & Adolescent Psychiatry Fellowship at Baylor College of Medicine. Dr. Hsiao has extensive experience treating diverse patient populations across various clinical settings.

Dr. Hsiao values open communication, collaboration, and building a safe, supportive environment where patients feel heard and respected. She treats a wide range of mental health concerns—including depression, anxiety, ADHD, and life transitions—in children, adolescents, and adults. She emphasizes trust and mutual understanding in the therapeutic relationship.

In the initial visit, Dr. Hsiao conducts a comprehensive evaluation to understand each patient’s unique history, concerns, and goals. She utilizes evidence-based medication management alongside therapeutic strategies to create personalized treatment plans that reflect and support her patients’ needs and aspirations.

Dr Reddy is double board certified in adult as well as child and adolescent psychiatry. She has experience working at various levels of mental health care. Dr. Reddy has most recently served as the medical director for a partial hospitalization/intensive outpatient program (PHP/IOP) for adolescents in the Dallas/Fort Worth area. She completed her general psychiatry residency at the University of Illinois at Peoria and went on to pursue her child and adolescent psychiatry fellowship at the University of Texas Southwestern. She is knowledgeable in treating patients of all ages and a wide variety of diagnoses including depression, bipolar disorder, anxiety, ADHD, OCD, PTSD, and eating disorders. Dr. Reddy is passionate about working with LGBTQIA+ populations, providing culturally informed care, and taking a person-centered approach to providing comprehensive and individualized treatment to her patients. She is well versed in incorporating psychotherapy in conjunction with medication management. She has experience in incorporating supportive, cognitive behavioral, and dialectical behavioral therapeutic approaches in her care.

Dr. Sara Mateo holds the position of staff Psychiatrist at Talkiatry. She is a board-eligible adult Psychiatrist. Dr. Mateo completed her Medical degree at the University of Benghazi- Faculty of Medicine and finished General Psychiatry Residency training at Tower Health/DrexelPhoenixville Hospital. Throughout her career, Dr. Mateo has actively contributed to various leadership roles and committees, demonstrating her commitment to advancing medical education and promoting diversity in the field. During her training, she generously shared her knowledge through educational presentations and lectures, fostering the growth of fellow trainees and medical students. Dr. Mateo is dedicated to creating a therapeutic environment characterized by warmth, empathy, and nonjudgmental support. Her approach involves collaborating with patients to develop individualized treatment plans that consider cultural, biological, psychological, and social factors. With a primary focus on medication management, Dr. Mateo's keen interest in psychotherapy is evident, as she often integrates supportive therapy, cognitive behavioral therapy, and psychodynamic psychotherapy during 30-minute follow-up visits to optimize wellness and recovery. Dr. Mateo brings a wealth of experience in caring for individuals of diverse ages and backgrounds, adeptly addressing a wide spectrum of conditions. Her expertise extends to treating depressive disorders, bipolar disorders, anxiety disorders, trauma and stress related disorders, ADHD, OCD, Insomnia, psychotic disorders; she also has experience treating individuals with medical comorbidities.

Dr. Sarita Sharma is a board-certified adult psychiatrist dedicated to providing personalized psychiatric treatment that addresses the mind, body, and spirit for optimized health and healing. Born and raised in Toronto, Ontario, she earned her medical degree from Avalon University School of Medicine in Curacao and completed her residency at Southern Illinois University in Springfield, Illinois. Dr. Sharma has extensive experience working with underserved patients from diverse backgrounds and with varying severities of psychiatric disorders. She has a genuine interest in treating mood and anxiety disorders like depression and anxiety. She views medication as one of many tools to aid patients, emphasizing the importance of therapy and lifestyle changes aligned with each patient's goals. Believing in a holistic approach, she incorporates mindfulness techniques, lifestyle optimization (sleep, diet, movement), Dialectical Behavioral Therapy (DBT), Cognitive Behavioral Therapy (CBT), and Acceptance and Commitment Therapy (ACT) to target the root causes of unease. She enjoys helping patients navigate meaning and purpose, relationship dynamics, and self-image. With a sincere, direct, and practical approach, Dr. Sharma values empathy and understanding as vital components of effective care. In her free time, she enjoys spontaneous adventures, connecting with fellow human beings, and just being in nature. She is committed to helping you achieve a balanced, fulfilling life.