Dennis Valerstain, MD

Dr. Andrews is a board-certified psychiatrist who received his medical degree from Lake Erie College of Osteopathic Medicine and completed his psychiatric residency at the University of Texas Health – San Antonio. Since graduating from medical school, Dr. Andrews served in the United States Air Force for over a decade, first as a Flight Surgeon and later as the Medical Director for mental health and substance abuse clinics overseas. In these roles, he provided medical support to Air Force personnel, their family members, and veterans. These invaluable experiences in high-pressure environments strengthened his desire to support the psychological challenges of individuals in a myriad of situations.

Outside of patient care, Dr. Andrews remains active in continuing education, ensuring the latest scientific advancements inform his practice. With a background grounded in medical excellence, military service, and clinical psychiatry, he brings a steady, knowledgeable, and compassionate presence to the healing process.

Dr. Andrews offers comprehensive psychiatric care to adults seeking support for mental health challenges. Whether you are experiencing stress, depression, panic attacks, sleep issues, or difficulty focusing, he provides a warm, nonjudgmental space to explore your concerns and work collaboratively on a treatment plan that aligns with your goals and values. He offers both medication management and a combination of psychotherapy techniques tailored to each patient’s unique needs for effective and lasting outcomes.

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Dr. Jacqueline Lewandowski is a board-certified physician specializing in adult psychiatry. She obtained her undergraduate degree from New York University where she studied psychology and child/adolescent mental health. Dr. Lewandowski received her medical degree from St. George's University in Grenada, before moving back to New York to complete her residency at Morningside and West Mount Sinai Hospitals. Since completion of training, Dr. Lewandowski has practiced and held teaching positions in both the Comprehensive Psychiatric Emergency Department of Harlem Hospital and the inpatient units and psychiatric emergency rooms of Morningside and West Hospitals. Dr. Lewandowski has a wide range of experience treating a diverse spectrum of psychiatric diagnoses and populations. She strongly believes in tailoring treatments through a holistic and patient-centered lens based on individual and multi-faceted histories. During 30-minute monthly sessions, Dr. Lewandowski focuses on collaborating with patients using evidence-based treatments with an emphasis on medication management in conjunction with supportive therapy. Additionally, she may recommend bringing a therapist into your care team to help facilitate a more comprehensive treatment plan. Dr. Lewandowski looks forward to working with you to help achieve and optimize your wellness and improve your quality of life.

Dr. Bryant graduated from Mount Sinai School of Medicine to complete her adult training and the Yale Child Study Center/Riverview Hospital for Children Program to complete her fellowship in Child and Adolescent Psychiatry. A native Texan, she returned to Tyler, TX in 2020 to accept the position of Chair of the Department of Psychiatry and Behavioral Medicine at the University of Texas Health Science Center at Tyler. She also established an accredited child and adolescent psychiatry fellowship in Tyler. Prior to that, she served as the Director of the Child and Adolescent Psychiatry Division at the University of Mississippi Medical Center where she was also the Program Director of the Child and Adolescent Psychiatry Fellowship. She received her medical degree from the University of Texas Southwestern Medical School. Working with survivors of trauma has always been an important part of Dr. Bryant's practice. She currently serves as the co-chair of the American Academy of Child and Adolescent Psychiatry's Committee on Child Maltreatment and Violence and she is a representative for the National Health Collaborative on Violence and Abuse. Dr. Bryant also served as the program director of the Eating Disorders and Trauma Recovery program at Menninger Clinic in Topeka. She is board certified in adult, child and adolescent psychiatry and she has over 32 years of experience as a practicing psychiatrist. Dr. Bryant specializes in the treatment of anxiety disorders, obsessive-compulsive disorder, mood disorders, developmental disorders, Post-Traumatic Stress Disorder, Attention Deficit Hyperactivity Disorder, and family relational problems for both children and adults. She believes that "knowledge is power" and that the more a person can understand about how the brain is affected by various mental health conditions, the more treatment makes sense.

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.

Dr. Nelson is a board-certified psychiatrist who attended the University of Iowa Medical School and completed her psychiatry residency and child and adolescent psychiatry fellowship at Walter Reed National Military Medical Center.  She has extensive experience treating active-duty service members, family members of active duty and the veteran population.  She feels comfortable working with a wide range of age groups and enjoys treating challenges with anxiety, mood, sleep, and concentration.

Dr. Nelson believes that the key to success in mental health care is being able to establish a trusting and open relationship between psychiatrist and patient.

While initial sessions include the need to gather background information about the patient overall as well as the symptoms of concern, subsequent sessions are focused on learning the impact of the treatment.

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Dr. Zhou is a board-certified psychiatrist who has more than 4 years of experience practicing in various clinical settings with an emphasis on mental health care in outpatient settings. She practices a holistic approach to developing an individualized plan to work toward a patient's goals. Dr. Zhou is experienced in treating depression, bipolar spectrum disorders, obsessive-compulsive disorders, post-traumatic stress disorder, generalized anxiety, and other related psychiatric disorders. Dr. Zhou received her medical degree from Texas Tech University Health Sciences Center School of Medicine and completed her adult psychiatry residency training at LSU Health Shreveport. Dr. Zhou's background and experiences have broadened her understanding of cultural stigmas and the relationship it plays in psychiatric care. She incorporates a multitude of treatment modalities such as supportive therapy, cognitive behavioral therapy, and mindfulness practices as an adjunct to pharmacotherapy. Dr. Zhou recognizes the value of a multifaceted approach to wellbeing and may recommend treatment modalities that are complementary to medication management.