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Welcome New Faculty!

New Clinicians and Basic Scientists Join Columbia Neurology 


Meet Dr. Aya Haggiagi

Aya Haggiagi, MD is an assistant professor of neurology at CUIMC, in the Division of Neuro-Oncology.  Dr. Haggiagi graduated with highest honors from the University of Al-Fateh School of Medicine in Tripoli, Libya.  She subsequently completed a postdoctoral research fellowship in the Department of Pathology and Cell Biology at Columbia, under the mentorship of Dr. Michael Shelanski, where her research focused on the biochemical and genetic changes in neurofibrillary tangle predominant dementia.  Dr. Haggiagi pursued her medicine internship at Westchester Medical Center, followed by neurology residency here at Columbia.  After residency, she completed a two-year fellowship in Neuro-Oncology at Memorial Sloan Kettering Cancer Center, where she remained as an attending physician and investigator, prior to returning to CUIMC this week.

For an appointment with Dr. Haggiagi, please call 212-342-0571.

Meet Dr. Hans-Ulrich Klein

Hans-Ulrich Klein, PhD is an assistant professor of neurological sciences (in Neurology, the Taub Institute, and the Center for Translational and Computational Neuroimmunology), in the Division of Neuroimmunology. Dr. Klein received his PhD in Biomedical Informatics and Biomathematics from the University of Münster, Germany then joined the Ann Romney Center for Neurologic Diseases at Brigham and Women’s Hospital and Harvard Medical School and continued his research fellowship here at the Taub Institute. Dr. Klein’s current research focuses on the interaction between the epigenome, transcriptome, genetic risk variants, and neuropathologies in different cell types of the central nervous system, with the aim of understanding the pathogenesis of neurological diseases.

Meet Dr. Rachel Mehendale

Rachel Mehendale, MD is an instructor in neurology at CUIMC, in the Division of Critical Care and Hospitalist Neurology. Dr. Mehendale graduated from the University of Texas at Austin with a dual major in Plan II Honors and Russian, European and Eurasian Studies, followed by the University of Texas School of Medicine at San Antonio for her medical doctorate. She was at Baylor College of Medicine in Houston for her intern year and graduated from Columbia Neurology residency in 2018. As a neurohospitalist, Dr. Mehendale’s clinical interest includes stroke and transplant neurology, and her research interests include quality improvement and outcomes in stroke.

Meet Dr. Vilas Menon

Vilas Menon, PhD is an assistant professor of neurological sciences (in Neurology, the Taub Institute, and the Center for Translational and Computational Neuroimmunology), in the Division of Neuroimmunology. Dr. Menon obtained his PhD in Applied Mathematics from Northwestern University and was a staff scientist at the Allen Institute for Brain Science in Seattle, WA. Prior to joining Columbia, he was a fellow at the Howard Hughes Medical Institute’s Janelia Research Campus. His major research interests include assessing cell type-specific interactions in the context of neurological disease, developing network-based models of dysregulation in Alzheimer’s, Parkinson’s, and Multiple Sclerosis, and identifying potential therapeutically targetable systems in these diseases. 

Meet Dr. Lauren Weaver

Lauren Weaver, MD is an assistant professor of neurology, in the Division of Child Neurology.  Dr. Weaver earned her medical doctorate from the University of Texas McGovern Medical School in Houston, followed by a combined Pediatrics/Child Neurology residency at St. Christopher's Hospital for Children in Philadelphia.  She subsequently completed fellowship training in Epilepsy here at Columbia.  Her academic interests include understanding how genetic diagnoses influence epilepsy outcomes, specifically after epilepsy surgery.  Dr. Weaver will see pediatric patients in both the inpatient and outpatient settings, with an emphasis on care of children with epilepsy/seizure disorders.

For an appointment with Dr. Weaver, please call 212-342-6867.