Table 4.

International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) Codes Used to Identify Index Heart Failure Hospitalizations

International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) Codes

402.01, 402.11, 402.91, 404.01, 404.03, 404.11, 404.13, 404.91, 404.93, 428.0, 428.1, 428.20, 428.21, 428.22, 428.23, 428.30, 428.31, 428.32, 428.33, 428.40, 428.41, 428.42, 428.43, 428.9

Index heart failure admissions were identified if one of the above International Classification of Diseases, Ninth Revision, Clinical Modification codes was listed in the primary position on the inpatient claim