web and print Present national estimates of provision and utilization of ambulatory medical care services provided by office-based physicians in the United States. Data based on National Ambulatory Medical Care Survey (NAMES). Provides data on use of ambulatory care services in terms of patient characteristics (age, sex and race); physician characteristics (specialty and professional status); and visit characteristics (patient''s principal reason for visit, physician''s principal diagnosis, checklist of medical conditions, injury-related visits, diagnostic and therapeutic service, etc.). Tables. HE 20.6209/3:315 GovPub Stacks U.S.