Caleb Cheatham, MD

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. Megan Crochet is board certified in Adult Psychiatry and has completed a fellowship in child and adolescent Psychiatry. Dr. Crochet attended medical school at Drexel University College of Medicine and completed her training at Mount Sinai School of Medicine, followed by Tulane University School of Medicine, where she was a chief resident. Dr. Crochet provides a therapeutic medication management visit, which incorporates therapeutic techniques tailored to the individual patient needs while adjusting medication doses. Her goal is to help patients manage their symptoms while working towards, over time, uncovering the root causes. This comprehensive process helps to empower her patients and provides hope and acceptance of their psychiatric challenges. If indicated, Dr. Crochet may believe that additional therapy is also needed and recommend that you bring a therapist into your care team to provide the best outcome. Dr. Crochet has worked in hospital systems, private practice, and most recently telemedicine. When not practicing, she enjoys all things water, cooking and spending time with her daughter and dog.

Dr. Tetyana Tarnavsky is a board-certified psychiatrist trained in Adult Psychiatry. She attended Dnipropetrovsk State Medical Academy in Ukraine where she received her M.D., M.S. and Ph.D. degrees in Psychiatry. Dr. Tarnavsky completed her residency at Harvard South Shore Psychiatry Residency Training Program in MA, where she was elected chief resident. Dr. Tarnavsky has an extensive research experience in Ukraine and the USA. She had studied computer addiction for her dissertation; had multiple abstracts and presentations; published several articles in peer-reviewed psychiatric journals as well as a book entitled Computer Addiction: Formation, Diagnosis, Correction and Prophylaxis. She has helped organize international conferences with the goal of improving access to and quality of healthcare in Dnipropetrovsk, Ukraine, and providing a national model for health care reform. Dr. Tarnavsky has worked with a variety of patients with diverse backgrounds in a Community Health Center and in the Partial Hospitalization Program as well as supervised medical students, psychiatry residents, and nurse practitioners. She has been a lecturer on psychiatry at Harvard Medical School and was involved in the training of psychiatry residents in the Harvard South Shore Psychiatry Training Program. Her primary focus has been on treating adults with depression, anxiety, post traumatic stress disorder, adjustment disorder, ADHD and other disorders. Dr. Tarnavsky strives to provide quality and compassionate treatment to individuals and their families.‍

Dr. Routhier was born in Quebec, Canada. She attended medical school at Ross University School of Medicine and graduated in three years with high honors. She trained as a psychiatry resident at Case Western Reserve School of Medicine in Cleveland, OH where she served as a junior attending and the medical student coordinator. She then was recruited by Monterey County Behavioral Health, CA as a clinical psychiatrist where she provided medication management and psychotherapy services to over 400 patients over the course of five years. She also created and led two dialectical behavior therapy groups for teens and young adults while training therapists and social workers to become group facilitators.

Dr. Routhier firmly believes in the mind-body connection. She feels that when the mind suffers, the body hurts as well and vice versa. As a result, she has developed a holistic approach to psychiatry and is comfortable offering a wide array of treatment modalities such as breathwork, dialectical behavior therapy, guided meditation, supportive psychotherapy, behavioral activation and medication management. She maintains that autonomy and a thorough understanding of one’s diagnosis and prognosis are critical for progress and healing. Her broad range of worldly experiences gives her the ability to work in a non judgemental, open-minded and authentic fashion. She connects with clients with ease and is passionate about self-awareness, constant evolution and empowering people so they can find their own way to happiness and health. She pushes her clients to find ways to build a life worth living, way beyond the goal of symptom resolution typical to psychiatry.

1. Getting to know you/understanding your “why”. Why are you seeking mental health treatment and why now? 2. Establish a list of issues and improvement zones. 3. Creating therapeutic goals. What do you want to work on? 4. Choosing treatment modalities to directly address these goals within a specific time frame. I provide updated and evidence-based information, and YOU choose what we do. 5. Figuring out the root causes to problems, symptoms and maladaptive behaviors/habits. How did this all start? Where does it come from? 6. Regular check-ins on how the treatment plan and therapeutic relationship are working for you. Are we a good fit? Are we meeting your goals/expectations? If not, back to the drawing board!

Dr. Peter Szeibel is board certified in adult psychiatry and has been practicing for over 36 years. His practice has focused primarily on medication management within the context of a supportive psychotherapeutic relationship. He also utilizes cognitive behavioral techniques. If the patient requires more intensive psychotherapy, Dr. Szeibel refers the patient to a therapist and collaborates with the therapist. Dr. Szeibel has experience in treating Depressive Disorders, PTSD, Panic Disorder, OCD, Bipolar Disorder, ADHD, and many other conditions. He feels his personal strengths include his inquisitiveness, scientific curiosity, and his desire to understand his patients better. Dr. Szeibel was born in Hungary, just a few months before the Hungarian Revolution against the Soviets broke out in 1956. He and his family fled under difficult circumstances and immigrated to the United States. Dr. Szeibel grew up in New York City. He attended The Bronx High School of Science, followed by Columbia University for his B.A., where he took a double major in chemistry and music. After obtaining his M.D. from S.U.N.Y in Syracuse, he returned to New York City for residency and fellowship training. During this time he won the Bendheim Fellowship Award at Cohen Children's Medical Center for his research study which examined the effects of background music on the academic performance of children with ADHD. His current areas of interest include adult ADHD, psychiatric and medical co-morbidities, and the LGBTQ population.

Background and credentials

Dr. John Whittier is a board-certified psychiatrist. He earned his Bachelor of Arts in Molecular, Cellular, and Developmental Biology from the University of Colorado at Boulder and went on to obtain a master’s degree in Medical Science from Loyola University Chicago. He completed his medical training at the Robert Larner, M.D. College of Medicine at The University of Vermont and returned to Colorado for his psychiatry residency at the University of Colorado School of Medicine. While in residency, he specialized in the Psychotherapy Scholars Program and has since gained four years of experience treating psychiatric conditions through telehealth.

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Treatment approach

Dr. Whittier primarily focuses on medication management for general psychiatric conditions. His approach is individualized, ensuring that each patient receives a treatment plan tailored to their unique needs. He integrates supportive therapy, medications, and evidence-based alternative therapies to provide a flexible and comprehensive approach. In addition to his general practice, he maintains a psychodynamic psychotherapy panel where he helps patients explore developmental and relational patterns that contribute to their symptoms. His specialties include treating depression, anxiety, adjustment disorders, PTSD, insomnia, bipolar disorder, and ADHD.

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What you can expect in a first visit

During the first visit, patients can expect a one-hour comprehensive intake during which Dr. Whittier thoroughly evaluates their symptoms, medical history, and personal goals. He provides treatment options that prioritize flexibility, allowing patients to take an active role in their care. Follow-up visits typically last 20 to 30 minutes, focusing on assessing treatment progress and making necessary adjustments. For those engaged in psychodynamic psychotherapy, longer one-hour sessions are available for in-depth exploration of underlying psychological patterns.

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Why Talkiatry?

We’re a virtual mental health practice that makes it easy to find great care. We combine quality and convenience to help you thrive—faster. Our providers, like this one, are highly trained experts who specialize in medication management and collaborate with you on a treatment plan that fits your needs and comfort level.

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