transferred to a Level 3 unit. Babies in a Level 2 unit may be classified for nursing purposes as 'Special Care', 'High Dependency' (HDU) (in which a nurse will be assigned up to two babies) or 'Intensive care' (where nursing is one-to-one, or sometimes even two-to-one). Level 3 Neonatal Units Also known as 'Neonatal Intensive Care Units' (NICU) - although Level 2 units may also have their own NICU. These look after the smallest, most premature and most unwell babies and often serve a large geographical region. Therapies such as prolonged mechanical ventilation, therapeutic hypothermia, neonatal surgery and inhaled nitric oxide are usually provided in Level 3 Units, although not every unit has access to all therapies. Some babies being cared for in Level 3 units will require less intensive treatment and will be looked after in HDU or SCBU nurseries on the same site. NHS England recommended in December 2019 that these units should care for at least 100 babies weighing less than 1.5 kg, and usually perform more than 2,000 intensive care days per year. United States The definition of a neonatal intensive-care unit (NICU) according to the National Center for Statistics is a "hospital facility or unit staffed and equipped to provide continuous mechanical ventilatory support for a newborn infant". In 2012, the American Academy of Pediatric updated their policy statement delineating the different levels of neonatal care. One major difference in the 2012 updated policy statement from the AAP compared to the 2004 policy statement is the removal of subspeciality nurseries for levels II and III with the addition of a level IV NICU. The four distinct levels of neonatal care defined in the most recent policy statement from the AAP are: Level I, Well newborn nursery Level II, Special care nursery Level III, Neonatal intensive-care unit (NICU) Level IV, Regional neonatal intensive-care unit (Regional NICU) Level I (well newborn nursery) Level I units are typically referred to as the well baby nursery. Well newborn nurseries have the capability to provide neonatal resuscitation at every delivery; evaluate and provide postnatal care to healthy newborn infants; stabilize and provide care for infants born at 35 to 37 weeks' gestation who remain physiologically stable; and stabilize newborn infants who are ill and those born less than 35 weeks' gestation until transfer to a facility that can provide the appropriate level of neonatal care. Required provider types for well