Margaret Reyes, PMHNP

Dr. Erica Mark is a board-certified psychiatrist with experience in both inpatient and outpatient care. She formerly served as a Staff Psychiatrist at a VA Medical Center, where she specialized in the mental health needs of veterans. Dr. Mark earned her B.S. in Biological Sciences, Summa Cum Laude, from Hampton University, received her MD from the University of Texas Medical Branch, and completed her psychiatry residency at Tulane University School of Medicine, serving as Chief Resident in 2017.

Dr. Mark fosters a warm, supportive environment where patients feel heard and respected. She values open communication and works collaboratively to set clear, personalized treatment goals. Deeply committed to service, she has supported underserved and marginalized communities through various nonprofit initiatives.

During initial sessions, Dr. Mark takes time to understand each patient’s history, concerns, and goals. She then creates individualized treatment plans aligned with each patient's unique needs and preferences. Dr. Mark encourages ongoing dialogue to adapt care plans and support long-term progress.

Dr. Nicholas Sahagian is a Psychiatrist in Colorado who has been practicing since 2023. He completed his MD and Adult Psychiatry Residency at the Chicago Medical School at Rosalind Franklin University and earned his BA in Neuroscience at Skidmore College. Dr. Sahagian has experience managing a broad array of complex psychiatric diagnoses in patients of diverse socioeconomic, cultural, and clinical backgrounds. Outside of work, he enjoys hiking, biking, skiing, playing guitar, reading, and collecting board games.

Dr. Sahagian offers psychiatric medication management while also incorporating elements of cognitive behavioral therapy, motivational interviewing, internal family systems, and lifestyle interventions. He believes that every patient is unique, and he works to create a supportive environment where individuals feel heard and empowered in their care.

Grounded in the biopsychosocial model, Dr. Sahagian takes a collaborative, patient-centered approach. He partners with patients to develop personalized treatment plans that integrate biological, psychological, and social factors, with the goal of guiding them along their path to improved wellness.

Dr. Matthew Hamilton is a psychiatrist who works with adults at all stages of life in improving mental health. He emphasizes a holistic approach in collaboration with patients to help them identify and achieve their goals. He has experience helping adults from a diversity of backgrounds with depression, anxiety, bipolar disorder, PTSD, panic, OCD, ADHD, substance use and autism spectrum disorder. He offers one-hour initial consultation appointments, as well as 20 to 30 minutes for follow-up visits. Dr. Hamilton received his undergraduate education at the University of Texas at Austin, his medical degree at Texas Tech University Health and Sciences Center, and completed his residency training at the University of Texas Medical Branch. During training he worked primarily with adults in local clinics and acute care hospitals in the greater Houston area. He was honored with an award for his accomplishments in psychotherapy during his senior year of residency. Dr. Hamilton offers his expertise in both medication management and psychotherapy in his practice, including cognitive, behavioral, motivational, and supportive therapies. He will collaborate with your therapist when you are working with one and may offer a referral to a specialist therapist if indicated.

Dr. Saria El Haddad is double boarded in general psychiatry and addiction psychiatry. She previously held a leadership role of medical director for the dual diagnosis partial hospitalization program at the Brigham and Women's Faulkner hospital where she helped create and establish this program, and also worked as an outpatient addiction psychiatrist. She has been involved in teaching and has maintained an academic affiliation with the Harvard Medical School. In addition, she has appeared in numerous professional publications and authored several research papers.  

Dr. El Haddad received her medical degree from the American University of Beirut, Lebanon and completed her psychiatry residency program at the University of Virginia. She completed a fellowship in addiction psychiatry through Boston University after which she started working at the Brigham and Women's hospital. Dr. El Haddad's approach to treatment focuses on adopting a holistic approach through behavioral change, medication management, and brief psychotherapy.

Dr. Michael Padua is a graduate from the University of Nevada, Reno School of Medicine and completed his psychiatry residency training at Loyola University Medical Center at Maywood, IL. He is trained and experienced in diagnosing and treating various psychiatric disorders including depression, anxiety, psychosis, and bipolar disorder with a focus on posttraumatic stress disorder, women's mental health, and cultural psychiatry. He combines his clinical expertise with a passion for working with underserved populations and the LGBTQIA+ population to address mental health needs across various communities. Dr. Padua has experience working in a variety of settings, which includes working as an outpatient psychiatrist at a federally qualified health center (FQHC), and as a correctional psychiatrist at the Washoe County Sherriff's Office in Reno, NV. In addition to his clinical work, Dr. Padua has also participated in research and education, and has co-authored peer-reviewed articles in the fields of psychiatry and biology.

Dr. Zadoo graduated from the University of Texas at Austin. She attended medical school at Texas Tech University Health Sciences Center and went on to complete her residency at UT Health San Antonio.

Dr. Zadoo is passionate about getting to know her patients and helping them live happier, healthier, and more productive lives. She specializes in treating a wide range of mental health conditions, including depression, anxiety, bipolar disorder, OCD, and trauma-related disorders. Her approach is rooted in empathy, active listening, and shared decision-making. She believes that every patient’s story matters and tailors treatment plans to meet each patient’s needs, values, and goals. By fostering a safe and respectful space, Dr. Zadoo helps patients navigate times of stress, life transitions, behavioral problems, communication issues, relationship difficulties, poor self-esteem, grief, loss, and other concerns.

Dr. Zadoo first completes an initial psychiatric evaluation to establish diagnoses and create a comprehensive plan for treatment. She is passionate about forming a strong therapeutic alliance and empowering patients to improve their lives through a variety of holistic modalities. While medications are a mainstay of psychiatric care, Dr. Zadoo is also skilled at using existential, psychodynamic, cognitive behavioral, and Gestalt psychotherapy techniques.

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