Julia Wellin, MD

Background  and credentials    

Dr. Christa DeFries is a board-certified Adult Psychiatrist. She earned her  medical degree from UT Southwestern Medical School in Dallas, Texas, and  completed her residency in Adult Psychiatry at Baylor Scott & White in  Temple, Texas. Following residency, Dr. DeFries gained additional experience  treating homeless and formerly homeless populations in New York City,  particularly focusing on individuals with histories of trauma and substance  addiction, prior to joining Talkiatry.    

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Treatment approach    

Dr. DeFries practices Adult Psychiatry, employing an integrative treatment  approach combining medication management, psychotherapeutic methods, and  lifestyle modifications. She recognizes that each patient benefits from a  personalized mix of these three aspects of care. Dr. DeFries specializes in  treating diverse psychiatric conditions, including those related to trauma,  substance addictions, and various mental health disorders.    

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What you can expect in a first visit    

In a first visit with Dr. DeFries, patients can expect a comprehensive  evaluation aimed at understanding their individual mental health history,  specific concerns, and overall treatment goals. Dr. DeFries emphasizes an  individualized approach, carefully exploring the best combination of  medication, therapy, and lifestyle adjustments tailored specifically to each  patient's needs. Patients can anticipate an empathetic and collaborative  environment focused on their personal experiences and goals.    

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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.

Dr. John Weller, MD, is a psychiatrist with a strong foundation in science and clinical care. He earned his undergraduate degree in molecular genetics from the University of Vermont and conducted neuroscience research in both academic and industry settings. A graduate of St. George’s University School of Medicine, he completed his psychiatry residency at Mather Hospital, Northwell Health, where he was honored as Resident of the Year in 2025 and inducted into the Alpha Omega Alpha Honor Medical Society.

Dr. Weller is committed to providing compassionate, evidence-based care that considers the full spectrum of biological, psychological, and social factors. He builds therapeutic relationships on empathy, respect, and trust. By tailoring treatment plans to each patient’s personal and cultural context, he helps individuals take control of their mental health and work toward long-term recovery and resilience.

In the first session, Dr. Weller takes time to listen carefully and gather a thorough understanding of each patient's concerns, history, and current functioning. He uses empathy and active listening to foster open communication and develop personalized treatment plans that may include therapy, medication, or lifestyle changes, with the goal of restoring wellness and stability.

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. Schwartz is a board-certified Staff Psychiatrist at Talkiatry. He completed his residency at Bergen New Bridge Medical Center in Paramus, New Jersey, where he excelled in his leadership and knowledge, becoming the Chief Resident in just his third year of residency at the busiest outpatient behavioral health clinic in New Jersey. Upon completion of his third year of residency, he went on to become Chief Academic Resident of his program, which allowed him to bestow his knowledge of psychiatry on younger psychiatrists in training. After completing his residency in General Psychiatry, he went on to complete a fellowship in the prestigious Mount Sinai Health System in New York City, based primarily out of the Beth Israel location. During this fellowship he studied Consultation-liaison psychiatry, also known as psychosomatic medicine. It is an exciting subspecialty of psychiatry that focuses on the care of patients with comorbid psychiatric and general medical conditions. Consultation-liaison psychiatry deals with the understanding and advancement of medical science, education, and the provision of healthcare for medically ill and complex patients. Using his training, Dr. Schwartz can focus on using his extensive medication knowledge to help treat an array of psychiatric disorders. Despite medication management, he also works on a holistic approach to psychiatry, including working with the patient to get the proper therapy services when clinically indicated. During the initial interview, a thorough assessment is done, including any medical and psychiatric history, medications you may be currently taking, and supplements before any medication is dispensed. Using his knowledge in psychiatry and consult-liaison psychiatry, Dr. Schwartz's interests include depression, anxiety, ADHD, obsessive compulsive and related disorders, transgender patients on hormone therapies and post-surgical transition. He also has an extensive interest in medical illnesses with a psychiatric component such as cancer patients, transplant, HIV, and many others alike. He looks forward to working with you to enhance your emotional well-being.

Dr. Amanda Kerr is a board-certified Psychiatrist. Her practice focuses on medication management, though she passionately believes in a holistic approach. She attended Boston University for her undergraduate studies and Loyola Marymount University for graduate school. She then completed her training at Midwestern University Arizona College of Osteopathic Medicine for medical school and Rowan University School of Osteopathic Medicine for residency, where she was selected to serve as Chief Resident during her final year. After completion of her residency in 2016, she dedicated seven years to serving a wide range of patients in a community mental health setting, both in-person and via telepsychiatry. She also serves as a provider at an Intensive Outpatient Program. She has experience treating patients with depressive and bipolar disorders, anxiety disorders, PTSD, and OCD. She also has extensive teaching experience in various settings. Dr. Kerr has a gentle and approachable style when providing medication management in conjunction with supportive psychotherapy, and at times Cognitive Behavioral Therapy techniques to more fully address each individual's needs. She utilizes mindfulness approaches as well, which she finds personally meaningful in her practices of meditation and yoga. If Dr. Kerr feels you would benefit from working with a therapist as well, she may recommend and values a collaborative approach.

Dr. Amy Prince is a board-certified adult psychiatrist who graduated from SUNY Downstate Medical Center and completed her residency training at UMass Medical Center, where she served as chief resident during her final year. Dr. Prince has worked with patients in a variety of treatment settings, including inpatient, partial hospital programs, community mental health centers, and outpatient. Dr. Prince believes that integrating therapy, psychopharmacology and lifestyle modifications can lead to the greatest gains in emotional wellness. She believes that working collaboratively with patients leads to the best outcome. Dr Prince has worked with a diverse patient population, but especially enjoys working with patients with mood disorders, anxiety, and ADHD. Dr. Prince offers supportive therapy in conjunction with psychopharmacology. In cases in which a patient would benefit from more intensive therapy than what could be done in 20-25 minute visits, Dr Prince may recommend adjunctive therapy with a licensed therapist.