Christopher J. Stille, MD, MPH, professor of pediatrics, is co-author of an original investigation, “Pediatric Medical Subspecialist Use in Outpatient Settings,” published January 4 by JAMA Network Open. The study used electronic health records and health plan claims data to compare rates of subspecialist use, finding that 8.6% of Medicaid beneficiaries, 10.4% of those with commercial insurance, and 21.3% of those whose primary care is received in academic health systems use pediatric subspecialty care each year.