Table 2.
Proportion of Chronic Conditions and Complications Coded by the CPAA Modifier as Present at Admission or Not Present at Admission
| ICD-9-CM | n | Present at Admission (%) | Not Present at Admission (%) | Missing (%) | |
|---|---|---|---|---|---|
| Chronic conditions | |||||
| Rheumatic fever w/ heart involvement | 391x | 43 | 90.70 | 9.30 | 0.00 |
| Chronic rheumatic pericarditis | 393 | 4 | 100.00 | 0.00 | 0.00 |
| Diseases of mitral valve | 394x | 606 | 98.35 | 1.32 | 0.33 |
| Diseases of the aortic valve | 395x | 89 | 100.00 | 0.00 | 0.00 |
| Diseases of the aortic and mitral valves | 396x | 4,940 | 98.74 | 0.97 | 0.28 |
| Diseases of other endocardial structures | 397x | 2,657 | 97.93 | 1.77 | 0.30 |
| Other rheumatic diseases | 398x | 1,901 | 96.37 | 3.16 | 0.47 |
| Anomalies of cardiac septal closure | 745x | 419 | 99.05 | 0.72 | 0.24 |
| Other congenital anomalies of the heart | 746 | 491 | 99.80 | 0.00 | 0.20 |
| Essential hypertension | 401x | 321,026 | 99.35 | 0.19 | 0.45 |
| Hypertensive heart disease | 402x | 24,592 | 98.29 | 1.32 | 0.39 |
| Hypertensive renal disease | 403x | 18,443 | 98.05 | 1.42 | 0.53 |
| Hypertensive heart and renal disease | 404x | 4,246 | 98.00 | 1.48 | 0.52 |
| Secondary hypertension | 405x | 362 | 94.75 | 4.42 | 0.83 |
| Old myocardial infarction | 412 | 52,813 | 99.19 | 0.42 | 0.39 |
| Other forms of chronic ischemic heart disease | 414x | 412,053 | 99.29 | 0.36 | 0.35 |
| Chronic pulmonary heart disease | 416x | 6,327 | 95.08 | 4.17 | 0.74 |
| Cardiomyopathy | 425x | 16,981 | 98.43 | 1.03 | 0.54 |
| Atherosclerosis | 440x | 19,404 | 98.33 | 1.00 | 0.67 |
| Aortic aneurysm and dissection | 441x | 13,946 | 98.67 | 1.00 | 0.32 |
| Other peripheral vascular disease | 443x | 23,807 | 99.28 | 0.38 | 0.34 |
| Chronic bronchitis | 491x | 12,130 | 94.09 | 5.54 | 0.37 |
| Emphysema | 492x | 4,509 | 98.89 | 0.86 | 0.24 |
| Asthma | 493x | 16,244 | 98.69 | 0.98 | 0.33 |
| Bronchiectasis | 494x | 441 | 95.92 | 3.17 | 0.91 |
| Chronic airway obstruction | 496 | 57,676 | 99.13 | 0.42 | 0.44 |
| Chronic liver disease & cirrhosis | 571x | 2,619 | 98.78 | 0.76 | 0.46 |
| Chronic pancreatitis | 577.1 | 331 | 96.98 | 2.42 | 0.60 |
| Morbid obesity | 278.01 | 6,066 | 99.62 | 0.12 | 0.26 |
| Chronic glomerulonephritis | 582x | 718 | 95.13 | 0.56 | 4.32 |
| Chronic renal failure | 585 | 4,109 | 97.91 | 1.63 | 0.46 |
| Multiple sclerosis | 340 | 699 | 99.57 | 0.29 | 0.14 |
| Diffuse disease of connective tissue | 710x | 2,538 | 99.01 | 0.43 | 0.55 |
| Rheumatoid arthritis | 714x | 7,121 | 99.42 | 0.14 | 0.44 |
| Disorders of parathyroid gland | 252x | 483 | 97.52 | 1.86 | 0.62 |
| Disorders of the immune mechanism | 279x | 107 | 98.13 | 0.93 | 0.93 |
| Hereditary hemolytic anemias | 282x | 584 | 98.63 | 1.20 | 0.17 |
| Primary thrombocytopenia | 287.3 | 546 | 91.39 | 6.96 | 1.65 |
| Complications | |||||
| Functional disturbances following cardiac surgery | 429.4 | 539 | 21.71 | 77.55 | 0.74 |
| Cardiac complications | 997.1 | 22,733 | 10.58 | 89.16 | 0.26 |
| Postoperative shock | 998 | 453 | 10.38 | 88.74 | 0.88 |
| Hemorrhage complicating a procedure | 998.11 | 8,897 | 12.75 | 86.73 | 0.53 |
| Pneumothorax | 512x | 3,296 | 16.84 | 82.65 | 0.52 |
| Pulmonary insufficiency following trauma or surgery | 518.5 | 6,706 | 14.35 | 85.22 | 0.43 |
| Peripheral vascular complications | 997.2 | 1,329 | 13.39 | 85.85 | 0.75 |
| Respiratory complications | 997.3 | 9,990 | 10.65 | 89.13 | 0.22 |
| Digestive system complications | 997.4 | 3,102 | 10.77 | 88.97 | 0.26 |
| Renal complications | 997.5 | 4,998 | 10.44 | 89.02 | 0.54 |
| CNS complications | 997.0 | 4,107 | 10.10 | 89.31 | 0.58 |
| Postoperative infection | 998.5 | 2,429 | 17.62 | 81.93 | 0.45 |
| Complications of medical care, unclassified | 999.0x | 1,476 | 16.67 | 82.05 | 1.29 |
CPAA, conditions present at admission.