Appendix Table 2.

Comorbidity diagnosis codes

Comorbidity	ICD-9-CM Codes
Diabetes	250
Ischemic Heart Disease	410–413, 414.0, 414.12, 414.2–414.9
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
Cerebrovascular Disease	362.34, 430–438
Chronic Kidney Disease	403.01, 403.11, 403.91, 404.02, 404.03, 404.12, 404.13, 404.92, 404.93, 582, 583.0–583.7, 585, 586, 588.0, V42.0, V45.1, V56
Chronic Pulmonary Disease	416.8, 416.9, 490–505, 506.4, 508.1, 508.8
Liver disease	070.22, 070.23, 070.32, 070.33, 070.44, 070.54, 070.6, 070.9, 456.0–456.2, 570, 571, 572.2–572.8, 573.3, 573.4, 573.8, 573.9, V42.7
Dementia	290, 294.1, 331.2
Hypertension	362.11, 401–405
Hyperlipidemia	272.0–272.4
Atrial Fibrillation	427.31
Anemia	280–285
Venous Thromboembolism	415.1, 416.2, 451–453

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