Top 10 Most Frequent Principal Diagnoses in Hospitals

In 2006, there were 39.5 million hospital stays, an increase of 14 percent from 1997. Here are the top 10 most frequent principal diagnoses in hospitals in 2006, along with their number of discharges (in thousands) and percentage of overall discharges, according to the Agency for Healthcare Research and Quality’s Healthcare Cost and Utilization Project (HCUP).

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  1. Pregnancy, childbirth, and newborn infants — 9, 252 discharges (23.5 percent)
  2. Pneumonia —1,218 discharges (3.1 percent)
  3. Coronary atherosclerosis (coronary artery disease)— 1,198 (3.0 percent)     
  4. Congestive heart failure —1, 099 discharges (2.8 percent)
  5. Non-specific chest pain — 857 discharges (2.2 percent)
  6. Cardiac dysrhythmias (irregular heart beat) — 749 discharges (1.9 percent)   
  7. Osteoarthritis (degenerative joint disease) — 735 discharges (1.9 percent)    
  8. Mood disorders (depression and bipolar disorders) — 729 discharges (1.8 percent)     
  9. Acute myocardial infarction (heart attack) — 675 discharges (1.7 percent)
  10. Disorders of intervertebral discs and bones in spinal column (back problems) — 636 discharges (1.6 percent)

Source: Levit K (Thomson Reuters), Stranges E (Thomson Reuters), Ryan K (Thomson Reuters), Elixhauser A (AHRQ). HCUP Facts and Figures, 2006: Statistics on Hospital-based Care in the United States. Rockville, MD: Agency for Healthcare Research and Quality, 2008. http://www.hcup-us.ahrq.gov/reports.jsp

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