Table 1 Definitions of comorbidities
Comorbidity | ICD-9-CM codes | DRG screen: case does not have the following disorders (DRG): |
|---|---|---|
1. Congestive heart failure | 398.91, 402.11, 402.91, 404.11, 404.13, 404.91,404.93,428.0–428.9 | Cardiaca |
2. Cardiac arrhythmias | 426.10, 426.11, 426.13, 426.2–426.53, 426.6–426.89, 427.0, 427.2, 427.31, 427.60,427.9, 785.0, V45.0, V53.3 | Cardiaca |
3. Valvular disease | 093.20–093.24, 394.0–397.1, 424.0–424.91, 746.3–746.6,V42.2,V43.3 | Cardiaca |
4. Pulmonary circulation disorders | 416.0–416.9, 417.9 | Cardiaca or COPD (88) |
5. Peripheral vascular disorders | 440.0–440.9, 441.2, 441.4, 441.7, 441.9, 443.1–443.9, 447.1,557.1,557.9, V43.4 | Peripheral vascular (130–131) |
6. Hypertension (combined) Hypertension, uncomplicated | 401.1, 401.9 | Hypertension (134) |
Hypertension, complicated | 402.10, 402.90, 404.10, 404.90, 405.11, 405.19, 405.91, 405.99 | Hypertension (134) or Cardiaca or Renala |
7. Paralysis | 342.0–342.12, 342.9–344.9 | Cerebrovascular (5, 14–17) |
8. Other neurological disorders | 331.9, 332.0, 333.4, 333.5, 334.0–335.9, 340, 341.1–341.9, 345.00–345.11, 345.40–345.51, 345.80–345.91, 348.1, 348.3, 780.3, 784.3 | Nervous system (1–35) |
9. Chronic pulmonary disease | 490–492.8, 493.00–493.91, 494, 495.0–505, 506.4 | COPD (88) or asthma (96–98) |
10. Diabetes, uncomplicatedb | 250.00–250.33 | Diabetes (294–295) |
11. Diabetes, complicatedb | 250.40–250.73, 250.90–250.93 | Diabetes (294–295) |
12. Hypothyroidism | 243–244.2, 244.8, 244.9 | Thyroid (290) or endocrine (300–301) |
13. Renal failure | 403.11, 403.91, 404.12, 404.92, 585, 586, V42.0, V45.1, V56.0, V56.8 | Kidney transplant (302) or renal failure/dialysis (316–317) |
14. Liver disease | 070.32, 070.33, 070.54, 456.0, 456.1, 456.20, 456.21 571.0, 571.2, 571.3, 571.40–571.49, 571.5, 571.6, 571.8, 571.9,572.3,572.8, V42.7 | Livera |
15. Peptic ulcer disease excluding bleeding | 531.70, 531.90, 532.70, 532.90, 533.70, 533.90,534.70,534.90, V12.71 | GI hemorrhage or ulcer (174–178) |
16. AIDSb | 042–044.9 | HIV (488–490) |
17. Lymphoma | 200.00–202.38, 202.50–203.01,203.8–203.81, 238.6, 273.3, V10.71, V10.72, V10.79 | Leukemia/lymphomaa |
18. Metastatic cancerb | 196.0–199.1 | Cancera |
19. Solid tumor without metastasisb | 140.0–172.9, 174.0–175.9, 179–195.8, V10.00-V10.9 | Cancera |
20. Rheumatoid arthritis/collagen vascular disease | 701.0, 710.0–710.9, 714.0–714.9, 720.0–720.9, 725 | Connective tissue (240–241) |
21. Coagulopathy | 2860–2869, 287.1, 287.3–287.5 | Coagulation (397) |
22. Obesity | 278.0 | Obesity procedure (288) or nutrition/metabolic (296–298) |
23. Weight loss | 260–263.9 | Nutrition/metabolic (296–298) |
24. Fluid and electrolyte disorder | 276.0–276.9 | Nutrition/metabolic (296–298) |
25. Blood loss anemia | 2800 | Anemia (395–396) |
26. Deficiency anemias | 280.1–281.9, 285.9 | Anemia (395–396) |
27. Alcohol abuse | 291.1, 291.2, 291.5, 291.8, 291.9, 303.90–303.93, 305.00–305.03, V113 | Alcohol or drug (433–437) |
28. Drug abuse | 292.0, 292.82–292.89, 292.9, 304.00–304.93, 305.20–305.93 | Alcohol or drug (433–437) |
29. Psychoses | 295.00–298.9, 299.10–299.11 | Psychoses (430) |
30. Depression | 300.4, 301.12, 309.0, 309.1, 311 | Depression (426) |