Boston Children's Hospital formerly known as Children's Hospital Boston until 2013 is a nationally ranked, freestanding acute care children's hospital located in Boston, Massachusetts, adjacent both to its teaching affiliate, Harvard Medical School, and to Dana–Farber Cancer Institute. Dana–Farber and Children's jointly operate the Dana–Farber/Boston Children's Cancer and Blood Disorders Center to deliver comprehensive care for all types of childhood cancers. The hospital is home to the largest hospital-based pediatric research program in the world. The hospital features 485 pediatric beds and provides comprehensive pediatric specialties and subspecialties to infants, children, teens, and young adults aged 0–21 throughout Massachusetts, the United States, and the world. The hospital also sometimes treats adults that require pediatric care. The hospital uses the Brigham and Women's Hospital's rooftop helipad and is an ACS verified level I pediatric trauma center, one of three in Boston. The hospital features a regional pediatric intensive-care unit and an American Academy of Pediatrics verified level IV neonatal intensive care unit. Boston Children's Hospital has been ranked as best pediatric medical center by U.S. News & World Report more times than any other hospital and is currently ranked as the best children's hospital in the United States. Its research enterprise is the world's largest and most highly-funded pediatric hospital. In 2022, Children's received more funding from the National Institutes of Health than any other children’s hospital in the nation. Overview One of the largest pediatric medical centers in the United States, Children's offers a complete range of health care services for children from birth through 21 years of age. Its Advanced Fetal Care Center can begin interventions at 15 weeks gestation, and, in some situations (e.g., congenital heart disease and strabismus), Children's also treats adult patients. The institution is home to 40 clinical departments and 258 specialized clinical programs. From October 1, 2017, through September 30, 2018 (fiscal year 2018), the hospital recorded: 622,000 outpatient visits 60,000 emergency department visits 28,000 inpatient and day surgical cases 5.4-day average length of stay a 2.13 average case-mix The hospital's clinical staff includes approximately 2,000 active medical and dental staff, 475 residents, fellows, and interns, and over 2,700 nurses. In addition to clinical personnel, Boston Children's has the largest pediatric research enterprise with 3,000 researchers and scientific staff and more NIH funding than any other children's hospital. A trained team of more than 460 volunteers devote thousands of hours each year to support