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Table 3 The 15 Most Frequent Primary ICD9-CM Codes for Hospital Episodes.

From: Exploring the association of dual use of the VHA and Medicare with mortality: separating the contributions of inpatient and outpatient services

Non Veterans Veterans Who are Not Dual Users Veterans Who are Dual Users
Code Description % Code Description % Code Description %
428 Congestive Heart Failure 6.1 414 Other Ischemic Heart Dx 5.2 780 General Symptoms 6.4
786 Resp. & hest Sx 5.6 600 Benign Prostate Hyper. 5.1 428 Congestive Heart Failure 5.4
600 Benign Prostate Hyper. 5.0 786 Resp. & hest Sx 4.9 411 Other Acute Heart Dx 4.5
486 Pneumonia 4.7 428 Congestive Heart Failure 3.9 410 Acute Myocardial Infarct 4.3
411 Other Acute Heart Dx 3.4 427 Cardiac Dysrhythmia 3.8 427 Cardiac Dysrhythmia 3.5
410 Acute Myocardial Infarct 3.2 780 General Symptoms 3.7 789 Oth. Abdomen/Pelvis Sx 3.4
780 General Symptoms 3.0 411 Other Acute Heart Dx 3.4 486 Pneumonia 3.2
414 Other Ischemic Heart Dx 2.9 410 Acute Myocardial Infarct 3.3 414 Other Ischemic Heart Dx 3.0
427 Cardiac Dysrhythmia 2.9 715 Osteoarthrosis 3.3 600 Benign Prostate Hyper. 2.9
715 Osteoarthrosis 2.7 486 Pneumonia 2.6 786 Resp. & hest Sx 2.7
578 Gastrointestinal hemor. 2.4 578 Gastrointestinal Hemor. 2.1 724 Unspecified Back Dx 2.4
436 Acute Ill-defined CVD 2.2 185 Prostate Cancer 1.9 574 Cholelithiasis 2.3
599 Other Urinary Tract Dx 2.1 599 Other Urinary Tract Dx 1.7 436 Acute Ill-defined CVD 2.3
485 Bronchopneumonia 1.8 433 Precerebrial Arter. Sten. 1.7 276 Electrolyte Imbalance 2.2
276 Electrolyte Imbalance 1.7 250 Diabetes Mellitus 1.6 715 Osteoarthrosis 2.1
Total   49.7 Total   48.1 Total   50.7
  1. Key to Abbreviations: Resp = Respiratory; Sx = Symptoms; Dx = Diagnoses; Hyper = Hyperplasia; Infact = Infarction; CVD = Cerebrovascular Disease; Hemor = Hemorrhage; Arter = Arterial; Sten = Stenosis; Oth = Other. h