Abinash K. Joshi, MD, is an Assistant Professor of Neurology in the Division of Sleep Medicine at Vanderbilt University Medical Center. He is board-certified in both Sleep Medicine and Family Medicine and provides comprehensive sleep medicine care for both adult and pediatric patients. His clinical practice encompasses the full spectrum of sleep disorders, including sleep-disordered breathing, insomnia, circadian rhythm disorders, sleep-related movement disorders, hypersomnia disorders, and parasomnias. He has particular expertise in obstructive sleep apnea, positive airway pressure therapy, and advanced treatment approaches for sleep-disordered breathing.

Prior to joining Vanderbilt faculty, Dr. Joshi served as Medical Director at Owensboro Health in Kentucky. His clinical interests include obstructive sleep apnea, optimization of positive airway pressure therapy, hypoglossal nerve stimulation, and emerging approaches to the treatment of sleep-disordered breathing.

Dr. Joshi has held several leadership roles within professional sleep medicine organizations. He previously served as President of the Kentucky Sleep Society for three terms and as a member of its Board of Directors. He is also a member of the American Academy of Sleep Medicine and the American Academy of Family Physicians. In recognition of his work in sleep medicine, he received the Inspire Medical Systems Physician of Excellence Award in 2023. He has been an invited speaker at regional and national conferences on topics including obstructive sleep apnea, positive airway pressure therapy, and evolving treatment approaches for sleep-disordered breathing.

Dr. Joshi is actively involved in medical education and has experience teaching physicians and residents in the diagnosis and management of sleep disorders. Prior to joining Vanderbilt, he served as gratis faculty and clinical preceptor for residents at the University of Louisville Family Medicine Residency.

Dr. Joshi earned his Bachelor of Arts in Neuroscience from Vanderbilt University and his medical degree from St. George’s University School of Medicine. He completed his Family Medicine residency at the University of Louisville, where he served as Chief Resident, followed by fellowship training in Sleep Medicine at Vanderbilt University Medical Center.

Adam B. Smith, MSN, APRN, FNP-BC, is a Family Nurse Practitioner with extensive experience in primary care, urgent care, and ambulatory medicine. He provides comprehensive care for patients with a broad range of acute and chronic medical conditions and has developed particular interests in Sleep Medicine and Community Health. With prior experience in primary care and urgent care, he began a new chapter in 2026 with Vanderbilt Health's Department of Neurology on the Sleep Medicine team.

He is a husband, father to three boys and spends as much time as possible outdoors with his family. He strives to be an active member of his community through his church and volunteer work.

Jennifer Smith, MSN, APRN, FNP-C, is a board-certified Family Nurse Practitioner specializing in neurology and epilepsy. She has more than a decade of advanced practice experience and provides comprehensive care for adults with epilepsy, seizure disorders, headaches, and a broad range of neurologic conditions. Her clinical practice emphasizes evidence-based medicine, individualized treatment planning, and patient-centered care.

Ms. Smith currently practices with Vanderbilt Neurology in the Epilepsy Program, where she evaluates patients with seizure disorders and collaborates in the development of comprehensive treatment plans. Her responsibilities include neurologic assessment, interpretation of diagnostic testing, antiseizure medication monitoring, and ongoing management of patients with complex neurologic conditions.

Prior to joining Vanderbilt, Ms. Smith provided specialty neurology care through CHRISTUS Neurology and Champion Neurology, where she cared for patients with headache disorders, epilepsy, and other neurologic conditions. She also has extensive experience in primary care, occupational health, urgent care, and community health settings, including service within federally qualified health centers caring for diverse and underserved patient populations.

Ms. Smith earned a Master of Science in Nursing from Vanderbilt University School of Nursing and a Bachelor of Social Work with a major in Spanish from Belmont University. Her diverse healthcare background, combined with her experience in neurology and primary care, allows her to provide comprehensive, compassionate care while helping patients navigate the complexities of chronic neurologic disease.

Max Freeberg, MD, PhD, is a neurologist and epileptologist specializing in the diagnosis and treatment of epilepsy and neurologic disorders. Dr. Freeberg has extensive training in epilepsy, electroencephalography (EEG), and clinical neurophysiology and has a particular interest in complex seizure disorders and refractory epilepsy. He completed fellowship training in both Clinical Neurophysiology and Epilepsy at Yale New Haven Hospital.

Dr. Freeberg has been actively involved in medical education throughout his training and served as Clinical Chief Resident in Neurology at Yale New Haven Hospital. He has taught medical students, residents, and fellows in both clinical and classroom settings and has contributed to epilepsy case conferences, neuroanatomy education, and inpatient neurology training. He has also served on the Yale New Haven Hospital Graduate Medical Education Committee and contributed educational content for the American Academy of Neurology.

Dr. Freeberg's academic work spans both engineering and clinical neuroscience. His research has resulted in numerous peer-reviewed publications and national presentations focused on neural engineering, peripheral nerve interfaces, neurostimulation technologies, and neurologic disease. His work has been recognized by the American Academy of Neurology, where he received an Abstract of Distinction award for his research examining the long-term safety and performance of implanted nerve cuff electrodes.

Dr. Freeberg earned a Bachelor of Arts in Molecular Biology from Princeton University, where he also completed certificates in Biophysics and Engineering Biology. He subsequently earned both a Doctor of Medicine degree with Honors and Distinction in Research and a PhD in Biomedical Engineering from Case Western Reserve University. He completed an Internal Medicine internship, Neurology residency, Clinical Neurophysiology fellowship, and Epilepsy fellowship at Yale New Haven Hospital.

Hannah Truitt, PhD, is an Assistant Professor of Clinical Neurology and Clinical Neuropsychologist at Vanderbilt University Medical Center. Dr. Truitt specializes in neuropsychological assessment and the evaluation of cognitive, behavioral, and psychiatric functioning in individuals with neurologic and neuropsychiatric conditions. She has specialized training in neuropsychology through internship training at Brigham and Women’s Hospital/Harvard Medical School and postdoctoral fellowship training at Cambridge Health Alliance/Harvard Medical School.

Dr. Truitt is actively involved in clinical education and mentorship. Throughout her training, she has supervised psychology trainees and neuropsychology practicum students and delivered educational presentations in neurology, psychiatry, and neuropsychology. She has also contributed to medical student education through teaching activities at Cambridge Health Alliance/Harvard Medical School.

Dr. Truitt’s scholarly work spans neuropsychology, addiction medicine, traumatic brain injury, neurodegenerative disease, and behavioral health. Her research has been recognized through multiple awards, including the Doctoral Student Excellence in Research Award and a Brain Injury Association of America Dissertation Grant. She has authored peer-reviewed publications and presented her work nationally and internationally, including research examining traumatic brain injury among individuals with opioid use disorder and functional assessments in Alzheimer’s disease clinical trials.

Dr. Truitt earned a Bachelor of Arts from the University of Tennessee and a PhD in Clinical Psychology from East Tennessee State University. She completed her clinical psychology internship in the Neuropsychology Track at Brigham and Women’s Hospital/Harvard Medical School and subsequently completed postdoctoral fellowship training in Neuropsychology at Cambridge Health Alliance/Harvard Medical School before joining the Vanderbilt faculty in 2026.

Adam J. Harshbarger, MD, is a neurologist with expertise in general neurology including the evaluation and management of a broad variety of both common and complex neurologic conditions encountered in outpatient practice. His clinical interests include headache disorders, neuromuscular, and movement conditions. He is board-certified in Neurology by the American Board of Psychiatry and Neurology.

Dr. Harshbarger has extensive experience caring for patients in the outpatient setting and performs a variety of neurologic procedures, including botulinum toxin injections for migraine and spasticity. Through clinical practice and patient-centered care, he seeks to improve neurologic outcomes and quality of life for individuals living with neurologic disease.

Dr. Harshbarger earned a Bachelor of Science with double majors in Biology and Economics from the University of Notre Dame. He received his medical degree from Indiana University School of Medicine and completed his internship and Neurology residency at Vanderbilt University Medical Center. Following residency training, he joined the Vanderbilt faculty as an Assistant Professor of Neurology.

Molly A. Sullivan, MD, is an epileptologist and clinical neurophysiologist specializing in the diagnosis and treatment of epilepsy and seizure disorders. Dr. Sullivan completed Neurology residency training at Vanderbilt University Medical Center, where she served as Chief Resident, and subsequently completed fellowship training in Epilepsy and Clinical Neurophysiology, serving as Chief Fellow during her final year of fellowship. She is board-certified in Neurology by the American Board of Psychiatry and Neurology.

Dr. Sullivan has demonstrated a strong commitment to medical education and leadership throughout her training. She has delivered lectures and educational conferences on epilepsy, seizure semiology, autoimmune encephalitis, mitochondrial disorders, and electroencephalography (EEG) interpretation for neurology residents, fellows, and advanced practice providers. She is the Associate Program Director for the Epilepsy and Clinical Neurophysiology fellowship.

Dr. Sullivan earned a Bachelor of Science in Biological Sciences with a minor in Spanish, graduating summa cum laude from the University of Tennessee. She received her medical degree from the University of Kentucky College of Medicine and completed her internship, Neurology residency, and fellowship training at Vanderbilt University Medical Center.