| HCUP Fast Stats U.S. National Top Ten Most Common Diagnoses for Inpatient Stays by Year, NIS ; 45-64 yr olds | ||||
| Rank (by N) | Diagnosis CCS Number | Principal Diagnosis 2013 | Total Number of Stays, Weighted | Rate of Stays per 100,000 |
| 1 | 203 | Osteoarthritis 2013 | 254,785 | 329 |
| 2 | 2 | Septicemia (except in labor) | 252,875 | 327 |
| 3 | 122 | Pneumonia (except that caused by tuberculosis or sexually transmitted disease) | 156,870 | 203 |
| 4 | 108 | Congestive heart failure; nonhypertensive | 153,790 | 199 |
| 5 | 657 | Mood disorders | 151,470 | 196 |
| 6 | 106 | Cardiac dysrhythmias | 150,200 | 194 |
| 7 | 205 | Spondylosis; intervertebral disc disorders; other back problems | 127,975 | 165 |
| 8 | 237 | Complication of device; implant or graft | 127,745 | 165 |
| 9 | 109 | Acute cerebrovascular disease | 114,235 | 148 |
| 10 | 100 | Acute myocardial infarction | 112,425 | 145 |
| Principal Diagnosis 2004 | ||||
| 1 | 122 | Pneumonia (except that caused by tuberculosis or sexually transmitted disease) 2004 | 1,174,239 | 401 |
| 2 | 101 | Coronary atherosclerosis and other heart disease | 1,158,306 | 395 |
| 3 | 108 | Congestive heart failure; nonhypertensive | 1,071,539 | 366 |
| 4 | 102 | Nonspecific chest pain | 822,309 | 281 |
| 5 | 657 | Mood disorders | 769,948 | 263 |
| 6 | 100 | Acute myocardial infarction | 675,076 | 230 |
| 7 | 106 | Cardiac dysrhythmias | 673,760 | 230 |
| 8 | 203 | Osteoarthritis | 640,091 | 219 |
| 9 | 205 | Spondylosis; intervertebral disc disorders; other back problems | 598,403 | 204 |
| 10 | 237 | Complication of device; implant or graft | 582,431 | 199 |
