Carmen Orellana Martinez, MD

Michelle Hamilton is a Board-Certified Psychiatric Mental Health Nurse Practitioner with a special interest in the care of adults with mood disorders, anxiety disorders, and PTSD. She earned her Master of Science Degree from The Ohio State University and her Bachelor’s Degree in Nursing from The Oregon Health & Science University in Portland, Oregon. Her background includes both inpatient and outpatient psychiatry, crisis stabilization, and Consult-Liaison Psychiatry. Michelle has a passion for incorporating a holistic, evidenced-based approach to improve the mental health needs of each individual client through medication and therapy while emphasizing practical lifestyle changes such as the incorporation of exercise, healthy nutrition, and stress management techniques.

Dr. Rania Elkhatib is a board-certified general psychiatrist with extensive experience in clinical care, teaching, and research. She earned her medical degree from the University of Texas Medical Branch in Galveston and completed her psychiatry residency at UTHealth Science Center in Houston, where she later served as an Assistant Clinical Professor. During that appointment, Dr. Elkhatib was heavily involved in medical education and has developed courses in cultural psychiatry and psychiatry boot camps for medical students.

Dr. Elkhatib specializes in treating a wide range of psychiatric conditions, including Major Depressive Disorder, Anxiety Disorders, Bipolar Disorder, OCD, ADHD, and PTSD. Dr. Elkhatib focuses on evidence-based medication management but will also incorporate supportive therapy and cognitive-behavioral techniques to optimize treatment management and patient’s wellness. She is fluent in Arabic and English and has a strong interest in working with diverse patient populations.

Dr. Elkhatib has a holistic approach with focus on medication management while incorporating supportive therapy and cognitive-behavioral techniques to optimize patient wellness.

Dr. Arballo is board-certified psychiatrist who completed medical school at Lake Erie College of Osteopathic Medicine. He received residency training at University of Texas Health - San Antonio where in addition to clinical training was appointed resident chair of the Quality Improvement and Patient Safety Committee.

Since graduation he has been a staff psychiatrist and the military unit director at Cumberland Hall Hospital providing comprehensive care to child, adolescent, adult, and geriatric patients.

Dr. Arballo provides evidence-based medication management and psychotherapy to address mental health conditions. He is a strong advocate for patient autonomy, quality improvement and psychoeducation.

Melissa Sims, MSN, APRN, PMHNP-BC, is a board-certified psychiatric mental health nurse practitioner who is passionate about delivering high-quality, compassionate, and comprehensive mental health care. She earned her Master of Science in Nursing from the University of Alabama at Birmingham in 2022 and has since worked in both community mental health and correctional settings.

Melissa takes a collaborative approach to care, working closely with other mental health professionals, medical providers, families, and relevant support systems to ensure well-rounded treatment. She emphasizes a patient-centered, individualized approach, combining medication management with psychotherapy to meet each person’s unique needs.

Patients working with Melissa can expect a thorough evaluation, accurate diagnosis, and a personalized treatment plan tailored to their mental health goals. One of her core priorities is to empower individuals to make informed decisions about their care by providing education grounded in research, evidence-based practices, and clinical experience.

‍

Dr. Vargas is an adult psychiatrist who received her medical degree from the University of Texas Health Science Center of San Antonio. She subsequently completed her psychiatry residency training at UT Health San Antonio.

Dr. Vargas has a patient-centered and thorough approach to treatment. She has experience treating a broad spectrum of mental health disorders, with particular interest in depression, anxiety, and post-traumatic stress disorder. She has also worked in clinic with severely mentally ill patients at the South Texas VA in San Antonio.

Dr. Vargas's primary focus is medication management with an emphasis on shared decision-making; however, she frequently also utilizes supportive therapy, cognitive behavioral therapy, and psychodynamic therapy principles in her approach. She may refer patients to a therapist if further support would be beneficial.

‍

Dr. Tyler Alderette is a board-certified psychiatrist with experience treating patients in outpatient and telehealth settings. He earned his medical degree from the American University of the Caribbean School of Medicine and completed his psychiatry residency at Larkin Community Hospital in Miami, Florida. His clinical interests include depression, bipolar disorder, anxiety disorders, ADHD, trauma-related conditions, psychotic disorders, and substance use concerns. Dr. Alderette provides evidence-based medication management integrated with psychotherapy-informed care and is committed to staying current with advances in psychiatric treatment to ensure safe and effective care.

Dr. Alderette strives to create a warm, nonjudgmental, and respectful environment where patients feel comfortable sharing their experiences. His approach is collaborative and patient-centered, working closely with patients to set clear goals and select treatments aligned with their values. He takes a whole-person approach, considering mental health alongside sleep, relationships, medical conditions, culture, and life stressors, and provides affirming, inclusive care for patients of all ages and backgrounds.

Dr. Alderette begins with a comprehensive evaluation to understand each patient’s history, current concerns, and personal goals. Treatment plans are individualized and may include medication management along with supportive therapy, cognitive behavioral therapy (CBT), and motivational interviewing. Follow-up visits focus on progress, side effect management, and ongoing adjustments, with an emphasis on education, open dialogue, and long-term stability.