NCHS offers data on patient visits, diagnoses, procedures.
D000553:Ambulatory Care / Q000706:statistics & numerical data*; D003625:Data Collection; D003953:Diagnosis-Related Groups / Q000706:statistics & numerical data; D019538:Health Care Surveys; D017051:Hospice Care / Q000706:statistics & numerical data; D006761:Hospitals / Q000706:statistics & numerical data; D006801:Humans; D007255:Information Services; D008396:Maryland; D009309:National Center for Health Statistics, U.S.; D009735:Nursing Homes / Q000706:statistics & numerical data; D010351:Patient Discharge / Q000706:statistics & numerical data; D014481:United States