| Adverse event | ICD-9 diagnosis code |
|---|---|
| Respiratory | |
| Bradypnoea | 786.09 acute |
| Pulmonary insufficiency after surgery and trauma | 518.5 acute |
| Respiratory complications | 997.3 acute |
| Asphyxia | 799.01 |
| Hypoxaemia | 799.02 |
| Gastrointestinal | |
| Constipation | 564.09 |
| Constipation, narcotic induced | E937.9 acute |
| Dizziness or vertigo | 386.2 acute |
| Dry mouth | 527.7 acute |
| Ileus, postoperative | 997.4 acute |
| Paralytic ileus | 560.1 |
| Nausea or vomiting | 787.01 acute |
| Nausea or vomiting after gastrointestinal surgery | 564.3 acute |
| Central nervous system | |
| Cerebral hypoxia | 997.01 |
| Nervousness | 799.2 chronic/acute |
| Delirium | 780.09 acute |
| Confusion, postoperative | 293.9 acute |
| Confusion classified otherwise | 293 acute |
| Altered mental status | 780.97 acute |
| Genitourinary system | |
| Urinary retention | 788.2 acute |
| Oliguria | 997.5 acute/relatedness |
| Other | |
| Bradycardia, postoperative | 997.1 acute/relatedness |
| Rash or itching | 698.9 acute/relatedness |
| Drugs causing adverse effects with therapeutic use | E935.2 acute/relatedness |
| Fall from bed | E884.4 |
Adopted from: Kessler ER, Shah M, Gruschkus SK, Raju A. Cost and quality implications of opioid-based postsurgical pain control using administrative claims data from a large health system: opioid-related adverse events and their impact on clinical and economic outcomes. Pharmacotherapy. 2013; 33:383–391.