National Center for Health Statistics U.S text Hyattsville,MD U.S. Dept. of Health & Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics monographic Description based on:2005, published 2008; title from caption (viewed Mar. 27, 2009) National Ambulatory Medical Care Survey (U.S.) Physician services utilization Hospitals Emergency services Utilization Emergency medical services Ambulatory medical care Utilization HE 20.6209/3-6: HE 20.6209/3-6: http://purl.access.gpo.gov/GPO/LPS110013 http://purl.access.gpo.gov/GPO/LPS110013 20160527183621.0 299509