Allison Holt, MD

Dr. Peter Hsieh has experience practicing in both outpatient and inpatient psychiatric settings. He earned his medical degree from the Zucker School of Medicine at Hofstra/Northwell and completed his psychiatry residency at Zucker SOM at Mather Hospital.

Dr. Hsieh values patient education and shared decision-making. He fosters a nonjudgmental environment where patients feel heard and supported, working collaboratively to develop a treatment plan that fits their goals and needs.

Dr. Hsieh begins with a comprehensive psychiatric evaluation and partners with each patient to create an individualized treatment plan that aligns with their values and evidence-based care. His approach often combines medication management with psychotherapeutic modalities.

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. Jacqueline Barrett is Board Certified in Adult and Child Psychiatry and Board Eligible in Forensic Psychiatry. She earned her Bachelor’s Degree in Nursing at Florida International University and her medical degree at Wayne State University in Detroit, Michigan. She completed her residency in Adult Psychiatry at Henry Ford Hospital and went on to complete fellowships in Child and Forensic Psychiatry at the University of Michigan/Center for Forensic Psychiatry. Dr. Barrett has extensive experience working in a variety of healthcare settings, including community mental health centers, inpatient and outpatient programs, and most recently at the Miami Veterans Affairs.

Dr. Barrett believes in a patient-centered approach that combines careful assessment, evidence-based treatment, and individualized care. She works with each patient to create a personalized plan that addresses both immediate needs and long-term goals. By integrating psychiatric expertise with compassion and collaboration, she empowers patients to take an active role in their mental health journey.

During your first visit, you can expect a thorough and compassionate evaluation in a warm, supportive environment where you will feel heard and respected. Dr. Barrett values open communication and works collaboratively with her patients to establish clear treatment goals. Her approach is rooted in trust, empathy, and partnership, ensuring that every patient feels comfortable and supported throughout their care.

Severine Dondina, PMHNP-BC, is a board-certified psychiatric nurse practitioner with licensure in Washington and Florida. She holds a Master of Science in Nursing from the University of Alabama at Birmingham and graduated summa cum laude with dual bachelor’s degrees in nursing and biomedical science. Her background spans outpatient, community, forensic, and crisis psychiatry, including leadership roles with Florida’s Assertive Community Treatment (FACT) and Multi-Disciplinary Forensic Teams.

Currently serving patients in Washington, Severine treats adults with ADHD, anxiety, depression, PTSD, and bipolar disorder. She brings a trauma-informed, strengths-based approach to care and is deeply committed to creating affirming spaces for LGBTQ+ and gender-diverse individuals. Her clinical style combines evidence-based medication management with warm, collaborative support.

Trilingual in English, French, and Spanish, Severine is known for her cultural sensitivity, clinical rigor, and authentic presence. She approaches each patient with curiosity, humility, and respect—believing healing begins with connection.

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Dr. Michael A. Murphy is board-certified in General Psychiatry as well as Child and Adolescent Psychiatry by the American Board of Psychiatry and Neurology. He has over 20 years of experience practicing medicine in outpatient, acute, and residential settings. He provides psychiatric assessments and medication management along with brief supportive psychotherapy. He is a strong advocate of collaboration between psychiatric care and psychotherapeutic interventions and encourages the utilization of therapists and counselors. Dr. Murphy holds a bachelor's degree in Chemistry Pre-med from Florida A & M University and a Medical Degree from the University of Florida College of Medicine. He completed both his residency in General Psychiatry and Fellowship in Child and Adolescent Psychiatry at the University of Virginia. He formally served as Chief of Behavioral Health Services at Ft. Eustis, Virginia. He has previously provided acute care and residential treatment at Newport News Behavioral Health Center, outpatient services in the community, and the foster care system. He has recently served as medical director of Harbor Point Behavioral Health Center. Dr. Murphy has an extensive history of providing care for both the adult and child population. He specializes in the treatment of children with Mood Disorders, Anxiety Disorders, ADHD, and Pervasive Developmental Disorders.

Dr. Bardugon is a board-eligible psychiatrist who specializes in the treatment of adults. He has experience in treating patients with various forms of depression and anxiety, bipolar disorder, OCD, ADHD, PTSD, and substance use disorders. He seeks to provide a safe, non-judgmental, gender affirming space for patients as they strive to lead a happier, more contented life. After a pediatrics residency, Dr Bardugon worked for 13 years as a pediatric ER physician. His interest in psychiatry was piqued during this time as he witnessed the emergence of a child and adolescent mental health crisis. While ultimately deciding to focus his efforts on the treatment of adults, Dr Bardugon is keenly aware of the influence of child development and family systems on the behavioral health of adults. Dr Bardugon employs a holistic, multimodal treatment approach. Aiming to treat the whole person, he stresses the importance of nutrition, exercise, and sleep. Dr Bardugon believes an informed patient actively engaged in decision making surrounding treatment has the best chance of effecting lasting change. Believing in the synergistic effect of talk therapy and medication, he incorporates one or more talk therapy techniques including motivational interviewing, cognitive behavioral therapy, and supportive and psychodynamic psychotherapies into most sessions. He often recommends formal participation in some form of talk therapy and is happy to collaborate with other providers.