Stephen Byrd, MD

Dr. Deringer is a psychiatrist with board certification in general psychiatry and addiction psychiatry. She earned her M.D. from the University of Michigan Medical School, and she completed her psychiatry residency and addiction psychiatry fellowship training at New York University. She has previously held faculty roles at New York University School of Medicine and Harvard Medical School. She has been involved in training the next generation of psychiatrists through her past work on the Program Director team for the MGH-McLean Psychiatry Residency Program. She has expertise in treating adults with mood disorders, anxiety disorders, substance use disorders, personality disorders, trauma, and ADHD.

Dr. Deringer cares deeply about understanding each patient's unique experience.  She recognizes that mental health symptoms are impacted by an individual's biological make-up, social situation, and their individual way of interacting with others in the world.  She will assess all of these factors and work with you to develop an appropriate treatment plan to help you feel better and meet your goals.  She incorporates supportive psychotherapy into all of her patient meetings; this may include discussions of the role of nutrition, exercise, and sleep habits in your overall well-being.

Dr. Deringer will begin the evaluation process with a thorough one-hour session in which we will discuss your current symptoms, your prior treatment history, your medical history, and your goals for treatment.  At the end of that session, she will begin to formulate her diagnostic impression and treatment recommendations.  Sometimes, the evaluation process may require more than one session, and it may be helpful for Dr. Deringer to gather information, with your permission, from prior treatment or to collaborate with your therapist if you have one.  Dr. Deringer will work with you on a medication treatment plan, if clinically indicated, to help you manage your symptoms and achieve your treatment goals.

Mary Birse is a board-certified Psychiatric Mental Health Nurse Practitioner (ANCC) with over 20 years of nursing experience. She graduated magna cum laude with a BSN from Florida Atlantic University and earned her MSN from the University of Florida. She completed a Psychiatric NP Residency at the VA in Charleston, SC. Mary has worked in a variety of settings including the West Palm Beach VA Medical Center, the Palm Beach County Firefighter’s Clinic, various outpatient telehealth platforms, and a child and adolescent inpatient facility. She was also an adjunct professor at Palm Beach State College.

Mary believes in empowering patients through education and collaboration so they can play an active role in their mental health journey. She works to create a warm and welcoming space where patients feel safe, heard, and understood. Whether the treatment path includes therapy, medication, integrative approaches, or a combination, she ensures that the plan reflects the patient's needs and goals.

Mary takes a thorough and holistic approach to care. She spends time understanding each patient’s history and past treatments—what has or hasn’t worked—and listens carefully to their current concerns and future goals. By factoring in lifestyle and preferences, she works with patients to build thoughtful, individualized treatment plans.

Dr. Austin Davidson grew up in Nashville, TN before moving to CA for his undergraduate studies at the University of California, Irvine where he was on the rowing team. He then attended medical school at the Alabama College of Osteopathic Medicine. He completed his psychiatry residency training at the University of Nevada, Las Vegas.

When he’s not practicing medicine, he enjoys spending time with his family, working out in his garage gym, and playing board games.

Dr. Davidson focuses on treating the whole patient. He believes medication is just one of the many important aspect to address when concerning mental health. Therapy, lifestyle changes, diet, and exercise are also equally important modalities that must be considered in treatment.  

Dr. Davidson’s treatment process typically begins with an in-depth history that focuses on getting to know his patients. He prefers to take his time with each patient and to make sure they feel they are heard. He believes the treatment process is a team effort and he takes time to come up with treatment plans that both he and his patients are comfortable with.

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Dr. Zezetko completed her medical training at the University of Georgia/August University Medical Partnership. While in medical school, she received a Master of Business Administration at the University of Georgia. She then moved to North Carolina to complete her psychiatric residency training at the Brody School of Medicine/ECU Health Medical Center. During her training, she gained extensive clinical experience in working with adults and veterans in psychiatric inpatient, outpatient, and emergency settings. She also served as a chief resident of the psychiatry program and published several case studies.

Dr. Zezetko relies on evidence-based treatments to guide pharmacotherapy decisions. In addition to medication management, she also incorporates supportive psychotherapy and psychodynamic psychotherapy techniques in her visits with her patients. When appropriate, Dr. Zezetko will refer patients for further psychotherapy and collaborate with therapists to provide more comprehensive care. Dr. Zezetko takes great pride in forming meaningful connections with her patients and listening to their concerns.

Dr. Zezetko will conduct a comprehensive psychiatric evaluation and take time to understand patients’ individual concerns, mental health goals, and history. Dr. Zezetko believes in building a strong therapeutic relationship that empowers patients to join in a collaborative discussion for optimizing their individual treatment plans and reaching their defined goals.

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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. Alejandra Vivas is board-certified in adult psychiatry and board-eligible in child and adolescent psychiatry. She completed her general psychiatry residency at Montefiore Medical Center and a child and adolescent fellowship at Mount Sinai School of Medicine. Dr. Vivas brings extensive experience from outpatient, emergency, and telepsychiatry settings. She has advanced training in CBT, Motivational Interviewing, and Psychodynamic Therapy. Fluent in English and Spanish, she is committed to culturally sensitive, individualized care.

Dr. Vivas fosters a warm, respectful, and professional space where patients feel seen and empowered. She values open communication and builds collaborative relationships to align treatment with each person’s values, goals, and lifestyle. Her approach is integrative and flexible, grounded in evidence-based methods to support lasting, meaningful change.

Dr. Vivas begins with a thorough evaluation to understand each patient’s history and goals. She creates customized treatment plans that may include therapy, medication, or both. Drawing on CBT, Motivational Interviewing, and Psychodynamic Therapy, she adapts care to meet evolving needs, aiming to relieve symptoms, foster resilience, and support long-term well-being.

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