Lilian L. Cohen, M.D., M.P.H. is an Assistant Professor in Pediatrics at Weill Cornell Medicine and Assistant Attending Pediatrician in the Department of Pediatrics at NewYork-Presbyterian Phyllis and David Komansky Center for Children's Health/Weill Cornell Medical Center. She is board-certified in pediatrics and clinical genetics.

Dr. Cohen completed her undergraduate studies at Columbia College in New York. Dr. Cohen then attended medical training at the University of North Carolina in Chapel Hill, where she earned her Medical Degree (M.D.) and a Master's in Public Health (M.P.H.). She completed residency in Pediatrics at NewYork-Presbyterian Hospital/Weill Cornell Medical Center and continued further training in Medical Genetics at Albert Einstein College of Medicine and The Children's Hospital at Montefiore.

Dr. Cohen cares for families who have or may have genetic concerns, prior to or during a pregnancy as well as after birth. Her clinical interests range from reproductive medicine to a wide range of genetic conditions requiring coordination of care at various ages such as cardiogenetic or neurodevelopmental disorders.  As Co-Director of the Weill Cornell Klinefelter Syndrome Care Center (https://urology.weillcornell.org/klinefelter-syndrome), Dr. Cohen works with a multidisciplinary team of specialists caring for children and young adults with X and Y chromosome variations.  She also sees children with clefts and craniofacial disorders as part of the Weill Cornell Craniofacial Clinic (http://weillcornellbrainandspine.org/craniofacial). 

Her research focuses on improving medicine utilizing genetic testing and genomic approaches. She is interested in how diagnosing conditions using molecular technology can help improve decision-making and early treatment for families. Dr. Cohen is currently active in ongoing studies with newborn screening and genome sequencing through research collaborations at several academic centers and the New York State Department of Health. She continues to work with several family advocacy and international support groups involving research and treatment for rare diseases.

In addition to clinical work, Dr. Cohen is actively involved in the teaching of medical students, residents and fellows from different departments as well as graduate students in genetic counseling.  She is the program director for the medical genetics residency program at Memorial Sloan Kettering Cancer Center and New York Presbyterian Hospital.  Outside of work, Dr. Cohen enjoys spending time and traveling with her husband and four children.