Nereida Gonzalez-Berrios, MD

Dr. Joshua Riederman is a board-certified psychiatrist with a specialization in the treatment of adults aged 18 to 65. Dr. Riederman obtained his undergraduate degree in brain, cognition, and neuroscience from the University of Michigan in Ann Arbor. He subsequently attended medical school at Nova Southeastern University in Fort Lauderdale, Florida, and completed his residency training at JFK Hospital in Palm Beach, Florida.

Dr. Riederman places a strong emphasis on establishing meaningful relationships with his patients and supporting them in achieving their individual life goals through effective treatment. He actively incorporates patient preferences into all treatment plans and integrates psychotherapy with medication management. Dr. Riederman recognizes the importance of educating patients about their care and dedicates time during each appointment to address any questions or concerns they may have.

In his clinical practice, Dr. Riederman begins by facilitating an open dialogue with patients regarding their primary concerns for the appointment. During initial consultations, he conducts a comprehensive assessment, which includes gathering relevant medical, familial, and social histories that may influence the course of treatment. In subsequent appointments, Dr. Riederman engages patients by inquiring about developments that have occurred since their last visit, as well as any issues related to medications or significant life events.

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Dr. Dopkin is a board-certified adult and child psychiatrist dedicated to helping patients feel well and stay well. A Long Island native, he earned his bachelor’s degree from Cornell University before attending St. George’s University School of Medicine. He completed his adult and child psychiatry training at Brown University. For over two decades, Dr. Dopkin has served New York City communities across Queens, Manhattan, and the Bronx, primarily within the public hospital system. He has held clinical, academic, and administrative leadership roles and has been recognized for his excellence in teaching and mentoring psychiatry residents. He also serves as Assistant Dean of Students for the U.S. clinical program at St. George’s University

Dr. Dopkin provides patient-centered care grounded in a biopsychosocial approach. He collaborates with each patient to tailor treatment plans that integrate evidence-based medication options with interpersonal and supportive therapy. He has worked with patients of all ages and backgrounds, including individuals from marginalized communities and those coping with trauma, depression, anxiety, and comorbid medical conditions.

With warmth and respect, Dr. Dopkin meets each patient where they are, helping them find the path that works best for their unique needs and goals.

Dr. Daniel Weiss is a double board-certified psychiatrist in adult and forensic psychiatry. His expertise is in diagnosing and treating psychiatric conditions, including depression and bipolar spectrum disorders, anxiety, stress and adjustment problems, maternal mental health, OCD, and other disorders. In addition, he has extensive experience working with individuals from diverse backgrounds, college and graduate students, creative professionals, and a range of working adults. Through a supportive psychopharmacologic approach, Dr. Weiss strives to provide a comfortable experience in which doctor and patient work to understand the presenting problems, reduce symptoms, and optimize functioning. In addition, Dr. Weiss encourages concurrent therapy and will communicate with that provider in a collaborative care arrangement. Dr. Weiss previously served as an attending psychiatrist on the staff of Montefiore Medical Center and was formerly a faculty member at the Albert Einstein College of Medicine. Before joining Talkiatry, Dr. Weiss spent a decade working at The New School as the university's staff psychiatrist.

Dr. Erica Mark is a board-certified psychiatrist with experience in both inpatient and outpatient care. She formerly served as a Staff Psychiatrist at a VA Medical Center, where she specialized in the mental health needs of veterans. Dr. Mark earned her B.S. in Biological Sciences, Summa Cum Laude, from Hampton University, received her MD from the University of Texas Medical Branch, and completed her psychiatry residency at Tulane University School of Medicine, serving as Chief Resident in 2017.

Dr. Mark fosters a warm, supportive environment where patients feel heard and respected. She values open communication and works collaboratively to set clear, personalized treatment goals. Deeply committed to service, she has supported underserved and marginalized communities through various nonprofit initiatives.

During initial sessions, Dr. Mark takes time to understand each patient’s history, concerns, and goals. She then creates individualized treatment plans aligned with each patient's unique needs and preferences. Dr. Mark encourages ongoing dialogue to adapt care plans and support long-term progress.

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. Luna Sanchez Rivera holds the position of Staff Psychiatrist at Talkiatry. After completing residency in 2016 at the Ponce Medical School Psychiatry Residency in Puerto Rico, she then moved to North Carolina to complete a subspecialty in Child and Adolescent Psychiatry at Duke University Health System. There, she transitioned into an assistant professor position, focused on structuring pediatric emergency psychiatric services, and helped support the consult and liaison pediatric service. Her years of experience have included working as an integrated care child psychiatrist within outpatient clinics at Duke University Health System, and she trained and worked as a staff psychiatrist at the Inpatient State Facility in North Carolina. She also served in the Dayton Children's Hospital outpatient clinics in Dayton, Ohio, the Appalachian Health System outpatient clinics in Linville, North Carolina, and more recently has been serving the Child and Adolescent inpatient population in Bangor, Maine. Dr. Sanchez Rivera has an approachable style aimed at providing a comprehensive evaluation for all age ranges and is comfortable managing various levels of diagnostic complexities. She provides supportive psychotherapy while using psychodynamic therapy skills to clarify her patient's constellation of symptoms, identify unifying themes and provide thorough psychoeducation throughout the process to drive positive outcomes. She integrates psychodynamic medication management approaches and is adept at family therapy interventions.