Chelsea Karson, MD

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. 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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Jaime Sather, PMHNP is a board certified psychiatric nurse practitioner with over 20 years' experience in the mental health field. Specialty areas include ADHD, anxiety, depression, mood disorders, substance abuse, PTSD, and women’s health. Clinical experience with inpatient, outpatient, detoxifications rehab, psychiatric emergency department, IOP, and PHP.

Comprehensive psychiatric evaluations, medication management, and brief psychotherapy are provided. Besides medication management with psychotherapy, individual therapy may be recommended for the best possible patient outcome.

Patients feel comfortable discussing their concerns in a non-judgmental therapeutic environment. Education is provided about diagnosis and treatment options with the patient being empowered to be an active part of their treatment plan.

Dr. Patricia Michel-Garrison is a board-certified psychiatrist by the American Osteopathic Board of Neurology and Psychiatry (AOBNP) with over a decade of experience in inpatient psychiatry. She completed her undergraduate training in Chemistry in Florida, having moved there from Chicago in 2000, followed by medical school at the Lake Erie College of Osteopathic Medicine (LECOM). She completed her residency in Psychiatry in Largo, Florida. Dr. Michel-Garrison specializes in treating adults aged 18 and over, addressing a wide range of psychiatric conditions including anxiety, mood disorders, and personality disorders. She is known for her holistic approach, integrating both traditional and osteopathic principles to provide comprehensive care. Her treatment style is patient-centered, emphasizing individualized care plans tailored to each patient's unique needs. Dr. Michel-Garrison fosters a collaborative therapeutic relationship, promoting open communication and trust with her patients. Throughout her career, Dr. Michel-Garrison has remained committed to staying current with the latest advancements in psychiatric care. She is dedicated to helping her patients achieve optimal mental health and well-being through a combination of evidence-based practices and empathetic support.

Dr. Mirica Sanders is a board-certified adult psychiatrist. She graduated from Tennessee State University and earned her medical degree from Ohio University College of Medicine. She completed her Psychiatry Residency as Chief Resident at The Cleveland Clinic and pursued advanced training in community and public psychiatry at Case Western Reserve University. Dr. Sanders has experience practicing in both outpatient and inpatient settings and holds a special interest in women’s mental health.

Dr. Sanders values creating a warm and inviting atmosphere where patients feel comfortable and heard. She encourages openness and authenticity, aiming for each patient to leave with a clear understanding of their treatment plan. She also welcomes questions to ensure patients feel fully informed and supported throughout their care.

Patients can expect a conversational interview in which Dr. Sanders gathers medical, social, family, and psychiatric history to inform a personalized treatment plan. Each session involves collaboration, with patients actively participating in shaping their care. Following appointments, patients receive an after-visit summary and instructions to guide them between sessions.

MassachusettsHolly James Corrigan, RN, MSN, PMHNP, is a board-certified psychiatric nurse practitioner committed to helping people navigate their mental health with skill and heart. She earned her BSN from Russell Sage College in 2009, her MSN from Massachusetts General Hospital Institute for Health Professions in 2016, and completed Psychiatry Redefined’s Fellowship in Functional and Integrated Psychiatry in 2025. Holly keeps current by attending top conferences, like the International Trauma Conference in Boston, ensuring she’s always at the forefront of her field.

Holly’s philosophy is simple yet powerful: care should fit the person, not just the diagnosis. She’s passionate about tackling complex issues—suicide prevention, C-PTSD, chronic depression, ASD, OCD—and advocating for underserved communities. For Holly, it’s about delivering real, meaningful support to those who need it most.

Her career began as a registered nurse in neurology, pediatrics, and emergency care, before she found her calling in psychiatry. Since then, she’s provided medication management and supportive psychotherapy in outpatient clinics and worked in inpatient units serving adults and adolescents.

Holly believes in patient-centered care based on the individual, rather than focusing only on a diagnostic algorithm. The first appointment will include a comprehensive psychiatric evaluation and a discussion about what your goals of treatment are. Pharmacological and therapeutic recommendations are both important elements of the treatment plan. Follow up appointments will be more concise, but may include various therapeutic modalities, medication changes, and supportive psychotherapy.