Saint Marys has a more than 76-bed emergency department but no obstetrics department, while Rochester Methodist lacks an emergency department but contains an obstetrics department. Saint Marys Hospital Emergency Department provides care for approximately 80,000 patients per year, serving the local population (constituting about 85% of patients) and being a referral for southern and central Minnesota, northern Iowa and western Wisconsin through Mayo One medical helicopter service. The Emergency Department includes a state of the art electronic all comprehensive patient flow system (known as "Yes"), 6 large trauma bays, universal (ICU capable) rooms, dedicated pediatric area, high acuity beds, 9 bed observation unit, fast-track/intake, slit lamp room, 4-psychiatry specific beds, acclimatized ambulance entrance and garage. St Marys also has a multiple dedicated trauma/surgical ICU's and hybrid operating rooms to provide the highest level of trauma care for the surrounding community.