Table 1.
ICD-9-CM Coding Algorithms for Charlson Index Comorbidities
| Comorbidity | Codes |
|---|---|
| Myocardial infarction | 410.x, 412.x |
| Congestive heart failure | 398.91, 402.01, 402.11, 402.91, 404.01, 404.03, 404.11, 404.13, 404.91, 404.93, 425.4–425.9, 428.x |
| Peripheral vascular disease | 093.0, 437.3, 440.x, 441.x, 443.1–443.9, 447.1, 557.1, 557.9, V43.4 |
| Cerebrovascular disease | 362.34, 430.x–438.x |
| Dementia | 290.x, 294.1, 331.2 |
| Chronic pulmonary disease | 416.8, 416.9, 490.x–505.x, 506.4, 508.1, 508.8 |
| Hemiplegia/paraplegia | 334.1, 342.x, 343.x, 344.0–344.6, 344.9 |
| Rheumatic disease | 446.5, 710.0–710.4, 714.0–714.2, 714.8, 725.x |
| Peptic ulcer disease | 531.x–534.x |
| Mild liver disease | 070.22, 070.23, 070.32, 070.33, 070.44, 070.54, 070.6, 070.9, 570.x, 571.x, 573.3, 573.4, 573.8, 573.9, V42.7 |
| Diabetes without chronic complication | 250.0–250.3, 250.8, 250.9 |
| Diabetes with chronic complication | 250.4–250.7 |
| Renal disease | 403.01, 403.11, 403.91, 404.02, 404.03, 404.12, 404.13, 404.92, 404.93, 582.x, 583.0–583.7, 585.x, 586.x, 588.0, V42.0, V45.1, V56.x |
| Any malignancy, including lymphoma and leukemia, except malignant neoplasm of skin | 140.x–172.x, 174.x–195.8, 200.x–208.x, 238.6 |
| Moderate or severe liver disease | 456.0–456.2, 572.2–572.8 |
| Metastatic solid tumor | 196.x–199.x |
| AIDS/HIV | 042.x–044.x |
Source: Quan, H., V. Sundararajan, P. Halfon, et al. “Coding Algorithms for Defining Comorbidities in ICD-9-CM and ICD-10 Administrative Data.” Medical Care 43 (2005): 1130–39.