title: Free-standing emergency centers and ambulatory surgery centers: evaluating feasibility and assessing impact on hospital operations.
mesh_terms: D000554:Ambulatory Care Facilities / Q000191:economics; D000556:Ambulatory Surgical Procedures / Q000191:economics; D004632:Emergency Medical Services / Q000191:economics; D005240:Feasibility Studies; D005251:Fees, Medical; D006275:Health Facility Planning; D007348:Insurance, Health; D007349:Insurance, Health, Reimbursement; D006278:Medicare; D014481:United States