Lorangelly Rivera, MD

Dr. Christopher DeBernard is a board-certified psychiatrist with extensive clinical leadership experience. He earned his MD and completed a combined residency in Internal Medicine and Psychiatry at Tulane University School of Medicine. Previously board certified in Internal Medicine, he is especially comfortable caring for patients with medical comorbidities. Dr. DeBernard has worked in both inpatient and outpatient settings and held leadership roles as Chief Medical Officer at Arisa Health and Lotic.ai. He also brings a systems-thinking perspective to clinical care from earlier careers in engineering and consulting. He holds active medical licenses in Louisiana and Arkansas.

Dr. DeBernard strives to create a warm, collaborative environment where patients feel respected, understood, and supported. His approach combines evidence-based medicine with an appreciation for each patient’s unique story, values, and motivations. Patients can expect open, direct communication, shared decision-making, and treatment plans that align with their personal goals. Trust, empathy, and authenticity form the foundation of his therapeutic relationships.

Dr. DeBernard begins by listening closely to each patient’s history, concerns, and hopes for treatment. Together, he works with patients to establish clear goals and develop individualized care plans that may include therapy, medication management, and lifestyle approaches. His focus is on both symptom relief and building long-term resilience, helping patients develop strategies that sustain well-being. Over time, he collaborates with patients to adapt treatment as their needs evolve, ensuring care remains effective and personalized.

Dr. Lisette Rodriguez-Cabezas earned her medical degree from the University of Illinois at Chicago and completed her psychiatry residency and a Women’s Mental Health Fellowship at Northwestern University. She has been Board Certified in adult psychiatry since 2017 and is a Distinguished Fellow of the American Psychiatric Association. With over 10 years of experience, she specializes in Women’s Reproductive Mental Health.

Dr. Rodriguez-Cabezas values a patient-centered approach, emphasizing open communication and creating a supportive environment where patients feel heard and understood.

She begins by gathering a detailed history from each patient to fully understand their goals and concerns. From there, she develops an individualized treatment plan tailored to the patient’s unique needs, ensuring care is collaborative and focused on achieving meaningful outcomes.

Dr. Clayton Stone (he/him) is a native of the Tennessee mountains who specializes in treating both children and adults. He completed a fellowship in Child and Adolescent Psychiatry at Washington University in St. Louis and a general psychiatry residency in San Antonio, Texas. Dr. Stone has worked in academic medical centers, public schools, state hospitals, a transgender health clinic, and a residential eating disorder center. He is experienced in caring for LGBTQIA+ individuals and underserved rural communities.

Dr. Stone offers a friendly, nonjudgmental space where patients feel supported and empowered. His collaborative style emphasizes respect, transparency, and shared decision-making. He is especially passionate about helping people navigate stress, build self-esteem, and develop healthy relationships. Depending on patient needs, he uses tools like talk therapy, lifestyle changes, parent coaching, and medication management to support healing.

Sessions begin with a detailed review of each patient's history, current concerns, and goals. Dr. Stone then works together with the patient to create a personalized care plan that may include therapy techniques, medications, psychoeducation, or coping strategies. When treating children or teens, he often includes family involvement or parent coaching to promote meaningful progress.

Dr. Debbarma is double board certified in General Psychiatry and Addiction Medicine. Dr.Debbarma is also certified in mindfulness therapy. Prior to joining Talkiatry, Dr. Debbarma was working as an attending psychiatrist and teaching faculty in an Academic hospital. She has experience of managing diverse patients ranging from chronic severe mental illness , dual diagnosis patients, crisis management and high functioning outpatients population.

Dr. Debbarma is an International medical graduate from India with post graduate training in Psychiatry and Family Medicine.  

To better understand USA public health and preventive care, Dr. Debbarma pursued advanced degree in Master of Public Health from Thomas Jefferson University, Philadelphia. Due to interest in global health, Dr. Debbarma worked as a post-doctoral fellow in Global Health at Rutgers university. Dr. Debbarma completed psychiatry residency from Cooper University Hospital and served as a chief resident.

Dr. Debbarma has diverse experiences in health care. Prior to moving to USA, she worked as a medical officer in government hospital system. Dr. Debbarma has years of experience in treating patients from different cultural and religious background.

As an Individual Dr. Debbarma is intrigued by human mind and behavior that’s why she choose to specialize in psychiatry. She focuses on "wholeness" by understanding the whole person not just their symptoms.

Her treatment approach includes bio-psycho-sociocultural model and patient centered care.  She offers medication management and supportive therapy. Based on clinical need Dr. Debbarma also incorporate CBT, Mindfulness, MI.

Dr. Debbarma has special interest in women mental health and cultural psychiatry.

Dr. Mattern is board certified in Adult psychiatry. Her approach to mental health is integrative, with the utilization of complementary and alternative treatments such as yoga, lifestyle changes, and nutritional interventions in addition to traditional medication management and therapy. Dr. Mattern prefers to focus on the overall health and well-being of an individual, rather than just treating symptoms.

Dr. Mattern’s practice focuses on medication management along with elements of therapy from different modalities, such as supportive and cognitive behavioral therapy that are patient-tailored.  Dr. Mattern understands the importance of psychotherapy and may ask to bring in a therapist into your treatment team to provide the best care and outcome. Her clinical interests include depression, bipolar disorder, anxiety disorders, post-traumatic stress disorder, panic disorder, OCD, and ADHD.

After completing her undergraduate degree in Biology at Ohio Northern University, Dr. Mattern received her medical degree from Ohio University Heritage College of Osteopathic Medicine. She went on to complete her residency in psychiatry at The Ohio State University Medical Center.  She also completed yoga teacher training and presented nationally at the APA in 2019 regarding the benefits of yoga for depression.  Dr. Mattern is a member of the American Psychiatric Association, Ohio Psychiatric Physician’s Association, and Psychiatry Society of Central Ohio.

Dr. Mattern is board certified in Adult psychiatry.  Her approach to mental health is integrative, with utilization of complementary and alternative treatments such as yoga, lifestyle changes, and nutritional interventions in addition to traditional medication management and therapy. Dr. Mattern prefers to focus on the overall health and well-being of an individual, rather than just treating symptoms.  Dr. Mattern’s practice focuses on medication management along with elements of therapy.

Dr. Catherine Shim is a board-certified psychiatrist and completed her training at the University of Washington, where she received additional certifications in Psychotherapy and Community Psychiatry.  Prior to joining Talkiatry, she spent years serving the mental health needs of underserved communities as well as our Veteran population.  Dr. Cat is excited to bring that same dedication and selfless service to her Talkiatry patients!

Dr. Cat is experienced in managing a multitude of mental health conditions, but her specialty is providing behaviorally oriented trauma-informed care.  Her approach is to treat primarily through psychotherapy and behavioral change, with medication management serving as an important (and often essential) adjuvant to optimizing mental health.

Dr. Cat tends to have a very casual engagement style, so expect a frank but open conversation during your first meetings with her.  Following that initial screening, anticipate a candid discussion about her approach to your condition and an initial treatment plan.  Please feel free to bring up any questions or concerns at any time during this process, and note-taking is highly encouraged!

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