Table 1 Postoperative complications and the ICD-9 diagnosis codes

Surgical complications

 Postoperative hemorrhagic anemia

285.1

 Hematoma/seroma

719.15, 719.16, 729.92, 998.11–998.13

 Wound infection

682.6, 682.9, 890.0, 890.1, 890.2, 894.0, 894.1, 894.2, 998.5, 998.51, 998.59, 998.83

 Wound dehiscence

998.3, 998.31, 998.32, 998.33

 Irrigation and debridement

86.04, 86.09, 86.22, 86.28, 86.3

 Mechanical complication of implant

996.40, 996.41, 996.43–996.49, 996.76–996.79

 Periprosthetic infection

996.66, 996.67, 996.69

 Dislocation of prosthetic joint

835.00–835.03, 835.10–835.13, 996.42

 Peripheral nerve injury

956.0–956.9

Medical complications

 Fever

780.60, 780.62

 Sepsis

995.91, 995.92

 Thrombocytopenia

287.40, 287.5

 Postoperative shock

998.0

 Altered mental status

780.97

 Cognitive symptoms

799.5x

 Postoperative delirium

293.0

 Central nervous system

997.0x

 Stroke

97.02

 Acute myocardial infarction

410, 410.x, 997.1

 Peripheral vascular

997.2

 Pulmonary

997.3, 997.31, 997.32

 Pulmonary insufficiency following surgery

518.51, 518.52, 518.53

 Pneumonia

480–480.9, 481, 482–482.9, 483, 483.1, 483.8, 484, 484.1, 484.3, 484.5–484.8, 485, 486, 487, 507

 Gastrointestinal

997.4

 Genitourinary

584.1–584.4, 599.0

 Urinary tract infection

599, 997.5

 Acute renal failure

584.5–584.9

 Pulmonary embolism

415.11, 415.13, 415.19

 Deep venous thrombosis

451.11, 451.19, 451.2, 451.81, 453.40–453.42

 Transfusion

99.03–99.05, 99.07