NCC MERP index for categorizing medication errors16
| Category | Definition |
|---|---|
| A | Circumstances exist that have the capacity to cause adverse events |
| B | An error occurred but did not reach the patient |
| C | An error occurred that reached the patient but did not cause patient harm |
| D | An error occurred that reached the patient and required monitoring to confirm that it resulted in no harm to the patient and/or required intervention to preclude harm |
| E | An event occurred that may have contributed to or resulted in temporary harm to the patient and required intervention |
| F | An event occurred that may have contributed to or resulted in temporary harm to the patient and required initial or prolonged hospitalization |
| G | An event occurred that may have contributed to or resulted in permanent patient harm |
| H | An event occurred that required intervention necessary to sustain life |
| I | An event occurred that may have contributed to or resulted in the patient’s death |