Dr. Miller is board certified in Internal Medicine, Pulmonary Disease, Critical Care Medicine and Allergy and Immunology. She has appointments in 3 departments in 2 Columbia schools and is the Director of Pediatric Allergy and Immunology, Director of Adult Allergy, and Director of the Allergy and Immunology Fellowship program. She was named as top pulmonologist in the 2011 US News and World Report report and is a Fellow at the American Academy of Allergy Asthma and Immunology. Her clinical office specializes in the treatment of asthma and allergies at the John Edsall-John Wood Asthma Center.

In addition, Dr. Miller is the Co-Deputy Director of the Columbia Center for Childrens Environmental Health (CCCEH), and Associate Director and Lead Physician Scientist for the Disease Investigation through Specialized Clinically-Oriented Ventures in Environment Research (DISCOVER). Her research concentrates on the mechanisms for the onset of asthma. One large research focus involves establishing and studying a birth cohort from Northern Manhattan (www.CCCEH.org), determining the importance of environmental allergens, traffic-related pollutants, and phthalate exposure to the onset of allergies, asthma, and Th2 immune responses. A major emphasis is on the role of prenatal and early postnatal exposure on later pediatric and adolescent asthma risk. Additional areas of research include identifying novel genetic by environment interactions important to the onset of asthma. She also has established several mouse models examining the importance of prenatal and postnatal environmental exposures on asthma risk. More recent initiatives have been to build a program in environmental epigenetics and asthma by studying DNA methylation in cell, mouse and human systems.

Dr. Moreno is an Assistant Professor of pediatrics whose current research relates to the effects of stress management in the role of asthma and asthma treatment in preadolescents/adolescents with asthma. Dr. Moreno is currently completing her Masters program at Weill Cornell Medical College in Clinical Epidemiology and Health Services Research.

During her fellowship, Dr. Nassef worked on developing an assay for measuring the effects of gamma delta cells on IgE productions by activated B cells.

Since then, her love for teaching and caring for patients has redirected my career to a more clinical path. Her goal is to provide the highest quality, individualized patient care using state-of-the-art diagnostic testing methods. She has a special interest in food allergies.

As Director of Education in the Allergy Division, Dr. Nassef is responsible for coordinating the activities of students and residents doing the allergy elective. She has also been active in giving grand rounds and teaching conferences in area hospitals and writing publications on various topics in allergy.

As the Allergy Consultant to Columbia Presbyterian Hospital's occupational health service, Dr. Nassef sees all hospital workers with work-related allergic conditions.