Henry T. Ireys, Ph.D., a senior researcher at Mathematica Policy Research, has extensive experience in policy analysis and program evaluation related to maternal and child health and children with special health care needs. Since 1999, Dr. Ireys has been the court monitor for a major class action suit involving Early and Periodic Screening, Diagnosis, and Treatment (EPSDT) services in the District of Columbia that pertains to oversight of the Department of Health's efforts to enhance the quality of such services. He has been a consultant to numerous state departments of health concerning programs for children and young adults with chronic illnesses and disabilities. Dr. Ireys holds a Ph.D. in clinical psychology from Case Western Reserve University. He joined Mathematica from the faculty of the Bloomberg School of Public Health at the Johns Hopkins University.