Table 5.

ICD-9-CM codes used to identify underlying and comorbid conditions

Condition	ICD-9-CM Codes
Cerebrovascular disease	362.34, 430.x-438.x
Chronic obstructive pulmonary disease	416.8, 416.9, 490.x-505.x, 506.4, 508.1, 508.8
Congestive heart failure	428.0
Coronary heart disease	410.x-414.x, 429.2, V45.81
Dementia	290.x, 294.1, 331.2
Diabetes mellitus	250.x
Hypertension	401.x-405.x, 437.2
Kidney 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
Liver cirrhosis	572.4
Metastatic carcinoma	196.x-199.x
Nephritis, nephrotic syndrome, and nephrosis	580–589
Peripheral vascular disease	093.0, 437.3, 440.x, 441.x, 443.1–443.9, 47.1, 557.1, 557.9, V43.4
Rheumatic disease	446.5, 710.0 through 710.4, 714.0–714.2, 714.8, 725.x
Syndrome of inappropriate secretion of antidiuretic hormone	253.6

Abbreviations: ICD-9-CM, International Classification of Diseases, Ninth Revision, Clinical Modification.