| Complication | ICD-9 Code | ICD-9 Code Description |
| Transfusion | 99.03 | Other transfusion of whole blood |
| 99.04 | Transfusion of packed cells | |
| Acute Deep Venous Thrombosis of Lower Extremity | 453.40 | Acute venous embolism and thrombosis of unspecified deep vessels of lower extremity |
| 453.41 | Acute venous embolism and thrombosis of deep vessels of proximal lower extremity | |
| 453.42 | Acute venous embolism and thrombosis of deep vessels of distal lower extremity | |
| Pulmonary Embolism | 415.1 | Pulmonary embolism and infarction |
| 415.11 | Iatrogenic pulmonary embolus and infarction | |
| 415.13 | Saddle embolus of pulmonary artery | |
| 415.19 | Other pulmonary embolism and infarction | |
| Postoperative Infection | 998.59 | Other postoperative Infection |
| 998.51 | Infected postoperative seroma | |
| 998.5 | Postoperative infection not elsewhere classifed | |
| Acute Myocardial Infarction | 410.01 | Acute myocardial infarction of anterolateral wall, initial episode of care |
| 410.11 | Acute myocardial infarction of other anterior wall, initial episode of care | |
| 410.21 | Acute myocardial infarction of inferolateral wall, initial episode of care | |
| 410.31 | Acute myocardial infarction of inferoposterior wall, initial episode of care | |
| 410.41 | Acute myocardial infarction of other inferior wall, initial episode of care | |
| 410.51 | True posterior wall infarction, initial episode of care | |
| 410.61 | Acute myocardial infarction of anterolateral wall, initial episode of care | |
| 410.71 | Subendocardial infarction, initial episode of care | |
| 410.81 | Acute myocardial infarction of other specified sites, initial episode of care | |
| 410.91 | Acute myocardial infarction of unspecified site, initial episode of care | |
| Dehiscence | 998.30 | Disruption of wound, unspecified |
| 998.31 | Dehiscence of internal operation wound | |
| 998.32 | Dehiscence of external operation wound | |
| Pneumonia or Pneumonitis | 997.39 | Postoperative pneumonia or postoperative pneumonitis |
| 997.32 | Postoperative pneumonia or postoperative pneumonitis, aspiration type | |
| Urinary Tract Infection | 599.0 | Urinary tract infection, site not specified |
| Cerebrovascular Accident | 997.02 | Postoperative cerebrovascular accident |
| Acute Kidney Failure | 584 | Acute kidney failure |
| 584.5 | Acute kidney failure with lesion of tubular necrosis | |
| 584.6 | Acute kidney failure with lesion of renal cortical necrosis | |
| 584.7 | Acute kidney failure with lesion of renal medullary (papillary) necrosis | |
| 584.8 | Acute kidney failure with other specified pathological lesion of kidney | |
| 584.9 | Acute kidney failure, unspecified | |
| Cardiogenic Shock | 998.01 | Postoperative cardiogenic shock |
| Other Postoperative Shock | 998.0 | Postoperative shock not elsewhere specified |
| 998.00 | Postoperative shock, unspecified | |
| 998.09 | Postoperative shock, other | |
| Sepsis | 998.02 | Postoperative septic shock |
| 038.0 | Streptococcal septicemia | |
| 038.10 | Staphylococcal septicemia unspecified | |
| 038.11 | Staphylococcus aureus septicemia | |
| 038.19 | Other staphylococcal septicemia | |
| 038.2 | Pneumococcal septicemia | |
| 038.3 | Septicemia due to anaerobes | |
| 038.40 | Septicemia due to gram-negative organism unspecified | |
| 038.41 | Septicemia due to Hemophilus influenza | |
| 038.42 | Septicemia due to Escherichia coli | |
| 038.43 | Septicemia due to Pseudomonas | |
| 038.44 | Septicemia due to Serratia | |
| 038.49 | Septicemia due to other gram-negative organisms | |
| 038.8 | Other unspecified septicemias | |
| 038.9 | Unspecified septicemia | |
| 785.52 | Septic shock | |
| 785.59 | Other shock without mention of trauma | |
| 995.91 | Systemic inflammatory response syndrome due to infectious process without organ dysfunction | |
| 995.92 | Systemic inflammatory response syndrome due to infectious process with organ dysfunction |