Medical Team
Prior to joining Muir Wood as the Psychiatrist for our Riverside programs, Dr. Dias held distinguished posts at the Keck USC School of Medicine where he also completed his residency and fellowship. These posts included serving as the Medical Director of Psychiatric Emergency Services for 7 years, Chief of the Department of Psychiatry for nearly 10 years, and faculty member of the University. As Clinical Assistant Professor, he taught psychiatry to medical students, interns and resident physicians. In addition to teaching, Dr. Dias has conducted PTSD research in the Level I trauma center at the Los Angeles County and USC Medical Center (LAC+USC), assessing the variables that contribute to both PTSD and Acute Stress Disorder and has had his findings published in peer-reviewed journals. After serving the academic community for more than 15 years, Dr. Dias also pursued a private practice in addiction medicine and psychiatry.
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Nurse Practitioner
Dr. Grimley is board-certified in both adult and child and adolescent psychiatry and has over 36 years of experience. She has expertise in alternative interventions including neurolinguistics programming and EMDR, has studied homeopathy, Gestalt, and Core Energetic therapies, and is open to incorporating individualized strategies for each patient. Dr. Grimley’s past leadership appointments include Medical Director, Aurora Santa Rosa Hospital; Medical Director, John Muir Behavioral Health Center Adolescent PHP and IOP; and with the Marin County Mental Health and Substance Abuse Services both with adolescents and adults. She is also a published author, teacher and has been recognized and honored for her outstanding accomplishment in teaching medical students.
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Dr. Nan Herron is a triple board-certified psychiatrist who received her training at Yale University and Brown University Medical School. She completed post graduate training at Brown University with a triple-board residency in Pediatrics, Psychiatry and Child and Adolescent Psychiatry, and was a Clinical Fellow in Post-traumatic Stress Disorder (supervised by Bessel van der Kolk, MD) at Massachusetts General Hospital, Harvard University Medical School. Dr. Herron has extensive training in Mindfulness-based Stress Reduction from the University of Massachusetts Dialectical Behavioral Therapy Training program and is certified in Trauma-Informed Mind-Body Programs. She has also received certification at the Marin Mindfulness Institute: Teaching for Children and Adolescents, and 200-Hour Yoga Teacher Certification. She has authored publications on the history of trauma in psychiatry, as well as trauma and the development of borderline personality disorder. Dr. Herron is affiliated with the American Academy of Child and Adolescent Psychiatry, American Medical Association, and First Responder Support Network.
CloseNursing Team
Lisa Sewell, RN, BSN joined the Muir Wood team in April of 2023 as Nursing Director. She graduated from the College of Marin Nursing Program in 2010 and received her BSN from Herzing University in 2021. After applying her skills in addiction programs and operating rooms, Lisa quickly distinguished herself as a leader among her peers. She began to take on more advanced roles like Charge Nurse, Assistant Director of Nursing, and Health Services Director in various skilled nursing facilities.
Lisa has also taught classes in Addictions Nursing at the University of San Francisco and holds regular lectures on the subject throughout the bay area. She is passionate about working with adolescents in recovery and is dedicated to helping her clients achieve long-term sobriety.
A life-long student of her field, Lisa maintains an enthusiastic interest in the ever-evolving addiction medicine world. She hopes to keep her team on the cutting edge of research and practices related to genomics, dual-diagnosis application, and medication-assisted treatment.
In her free time, Lisa enjoys hiking, biking, reading, and spending time with her family and dog, Bella.
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Assistant Director of Nursing
Shehnaz Hussain, PMHNP-BC is a board certified Psychiatric Mental Health Nurse Practitioner, with training and experience treating psychiatric disorders across the lifespan and across practice environments; including inpatient and outpatient settings. She has extensive experience as a PMHNP working with all ages of patients including young children, adolescents, and adults. Shehnaz completed her graduate education at the Maryville University of St. Louis, Missouri, obtaining a Master’s of Nursing with a Psychiatric Mental Health Nurse Practitioner specialization. She provides supportive psychotherapy and medication management to individuals of all ages. Her specialty areas include substance use disorders, depression, anxiety, ADHD, and PTSD. She works collaboratively with others members of the team to ensure optimal treatment for patients. .
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Psychiatric Mental Health Nurse Practitioner
Basia Sowle is a master’s level, registered nurse who was trained at NY Presbyterian Cornell Hospital in New York City, where she worked for years as a clinical specialist in Neurosurgery. Basia moved to California and was offered a position at Cedar Sinai Hospital in Los Angeles where she was recognized as a distinguished member of the adult and pediatric surgery departments. She was responsible for developing nursing assessments, education protocols regarding medications and treatment, documentation of care, and patient safety. In the past five years, Basia has been employed at UCSF as Clinical Nurse III. At UCSF, Basia was a candidate and recognized by the university for the prestigious DAISY Award. We are honored to have a nurse of this caliber at Muir Wood Adolescent and Family Services.
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Registered Nurse
Registered Nurse
Susan is a graduate of Fresno City College and Fresno State University, and boasts an impressive twenty-five years of experience in pediatric and correctional nursing. Throughout her long career, Susan has worked in medical/surgical, neonatology, cardiology, genetic, and oncology nursing. These diverse experiences have provided Susan with valuable learning opportunities and a broad range of skills. Susan’s interests extend beyond nursing, encompassing gardening, crafts, photography, traveling, cooking, swimming, and antiques. She also cherishes her role as a mother to two talented and beautiful daughters, as well as being a caregiver to her special rescue cat, Jasper.
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Registered Nurse