Table A1.

Diagnostic codes for comorbid conditions

DiagnosisDefinition
HypertensionICD-9 outpatient or inpatient discharge codes: 401*, 402*, 403*, 404*, and 405*
Diabetes mellitusICD-9 outpatient or inpatient discharge codes: 250* (primary diabetes), 249* (secondary diabetes), 357.2* (neuropathy in diabetes), 362* (diabetic retinopathy), 366.41* (diabetic cataract), 648* (diabetes in pregnancy)
Coronary artery diseaseICD-9 outpatient or inpatient discharge codes: 440*, 410*, 411*, 413*, 414*
Peripheral vascular diseaseICD-9 outpatient or inpatient discharge codes: 443*, 440.2*, 440.3*, 440.4*
DialysisInpatient ICD-9 procedure codes: 12.55, 39.95*, 54.98*
Outpatient and fee basis ICD-9 diagnosis codes: 585.6, V45.1, V56.0, V56.2, V56.3, V56.31, V56.32, V56.8, V58.8
Outpatient CPT codes: 90935, 90937, 90947, 90989, 90993, 90921, 90925
Congestive heart failureICD-9 outpatient or inpatient discharge codes: 428*, 425*, 398.91, 402.01, 402.11, 402.91, 404.91, 404.93
HospiceICD-9 outpatient or inpatient discharge codes: V66.7*
Outpatient CPT codes: 99377
Renal transplantICD-9 outpatient or inpatient discharge codes: 55.6, 55.61, 55.69, 996.81, V42.0
ICD-9 inpatient procedure codes: 00.91, 00.92, 00.93
Outpatient CPT codes: 50380, 50365, 50360
  • * Includes all subcodes (e.g., 401.01, 401.02, etc.). ICD-9, International Classification of Diseases, Ninth Revision; CPT, Current Procedural Terminology.