Cassandra Garcia-Lozano, LPC

Brian F. Lann, MA, LPC, LPC-S, LAC, is a licensed mental health professional with over 23 years of experience across outpatient, inpatient, and telehealth settings. He specializes in substance use disorders and complex conditions including OCD, anxiety disorders, and Major Depression. Brian is trained in CBT, ERP, HRT, DBT, and trauma-focused therapies, and has completed extensive specialized training in evidence-based interventions for OCD and related disorders.

Brian provides a structured, compassionate, and collaborative approach to care. He believes in meeting patients where they are while offering practical tools that create meaningful change. He emphasizes accountability, skill-building, and measurable progress, particularly in treating addiction, OCD, anxiety, and trauma-related concerns.

Brian begins with a comprehensive assessment to clarify goals and develop an individualized treatment plan. He integrates evidence-based modalities such as CBT, ERP, and trauma-focused therapies, with ongoing evaluation of progress. Treatment includes clear goal setting, skill practice between sessions, and coordinated care when appropriate.

Dr. Leslie Chavez is a board-certified adult psychiatrist with a diverse background in clinical and academic medicine. She completed her medical school and residency at the University of New Mexico, where she later served as a psychiatrist and assistant professor, treating high-need patients and teaching residents and medical students. During the pandemic, she transitioned to telehealth and has been dedicated to this field for the past four years. Dr. Chavez is known for making her patients feel seen and heard, using both medication management and supportive psychotherapy. Dr. Chavez began her academic journey as a physics major at UNM and then studied biophysics at the University of San Diego, California. During her postdoctoral fellowship at Los Alamos National Laboratories, she was inspired by presentations about professionals working with patients in African countries, which sparked her interest in medicine. During this time, her father died of cancer, and she saw the impact of mental health therapy on his quality of life, further solidifying her motivation to attend medical school. Witnessing the profound impact of mental health on her patients and family, she specialized in psychiatry. Dr. Chavez is a seasoned psychopharmacologist and emphasizes the importance of nutrition, exercise, and community in mental health. She enjoys all aspects of medicine and combines her extensive knowledge with a patient-centered approach.

Dr. Pressley Warrick is a double board-certified psychiatrist specializing in general psychiatry and child and adolescent psychiatry. Dr. Warrick currently practices full-time, offering comprehensive psychiatric care to children, adolescents, and adults. She previously established and led a Behavioral Health Clinic integrated within a Family Medicine Practice. Prior to this role, Dr. Warrick provided dedicated psychiatric care at a private psychiatry practice for over a decade.

Dr. Warrick earned her medical degree from the Medical University of South Carolina, completed residency training at Baylor College of Medicine's Menninger Department of Psychiatry and Behavioral Sciences, and pursued additional specialization through a Child and Adolescent Psychiatry fellowship at Palmetto Health/USC School of Medicine.

Known for a collaborative and holistic treatment approach, Dr. Warrick emphasizes individualized care and evidence-based practices to support patients’ mental wellness. Her professional excellence has earned recognition as Sumter’s Best Psychiatrist for consecutive years.

Dr. Warrick’s preferred treatment modalities include medication management, psychodynamic psychotherapy, and supportive psychotherapy. She specializes in treating depression, anxiety, ADHD, autism, OCD, bipolar disorder, and PTSD. Her typical approach for new patients involves taking a detailed patient history, establishing rapport, and setting clear treatment goals in partnership with her patients.

Dr. Stephanie Negrey is a board certified psychiatrist. She completed her undergraduate degree in Biology and History at Fordham University in the Bronx and then attended medical school at the Renaissance School of Medicine at Stony Brook University. She completed her residency at Wright State University in Dayton, Ohio as a member of the United States Air Force. Dr. Negrey served as an active duty psychiatrist; her duties included medical director of the mental health clinic at a special operations base as well as a program manager for the Air Force substance use program.

Dr. Negrey has experience treating a wide range of ages and diagnoses, with particular emphasis on personality disorders, depression, anxiety, and post traumatic stress disorder. She integrates supportive and psychodynamic therapies into her medication management appointments with a goal of achieving improvement through a holistic approach. Dr. Negrey will work with patients to reach their goals for their mental health care while also providing a compassionate and collaborative environment.

Andrea Hamilton, LMHC, MBA is a Licensed Mental Health Counselor with over 20 years of experience providing compassionate and effective therapeutic care to individuals, families, and groups. Throughout her career, she has worked across diverse settings, including educational institutions, foster care systems, group homes, government agencies, and healthcare organizations. This extensive background has equipped her to address a wide range of mental health challenges, including anxiety, depression, trauma, relationship issues, and life transitions.

She holds a Master of Education and an MBA from Florida Atlantic University, along with a Bachelor of Science in Psychology with a minor in Criminal Justice. She is CFARS Certified, and a Qualified Supervisor in the State of Florida. Her commitment to professional growth is evident in her numerous certifications and specialized training in ethics, trauma processing, domestic violence, and online counseling.

In addition to her clinical expertise, Andrea Hamilton has served as an adjunct professor and leader in clinical operations, further demonstrating her dedication. She is committed to delivering accessible, high-quality care tailored to the unique needs of her clients.

Dr. Stansberry holds the position of staff psychiatrist at Talkiatry. He is board-certified in Adult Psychiatry by the American Board of Psychiatry and Neurology. Stansberry's practice focuses on medication management and also incorporates supportive therapy techniques, typically in 30-minute follow-up visits. In some cases, Dr. Stansberry may believe that additional therapy is also needed and ask that you bring a therapist into your care team. Dr. Stansberry received his medical degree from the Louisiana State University Health Sciences Center in New Orleans. He completed his residency training through the Louisiana State University/Ochsner Health Foundation Psychiatry Residency program. He has experience working in inpatient, emergency, and consult-liaison psychiatry but particularly enjoys the opportunity to work longitudinally with patients in the outpatient setting.**THIS PROVIDER CANNOT PRESCRIBE CONTROLLED SUBSTANCES FOR LOUISIANA PATIENTS**