Table 1.

NCCMERP Index for categorizing medication errors

Category	Description	Inference
A	Events have the capacity to cause error	No error
B	An error occurred but did not reach the patient	Error, no harm
C	An error occurred reached the patient but did not cause potential harm	Error, no harm
D	Error occurred reached the patient and required monitoring	Error, no harm
E	An error occurred that resulted in temporary harm to the patient and required intervention	Error, harm
F	An error occurred that resulted in temporary harm to the patient and required initial or prolonged hospitalization	Error, harm
G	An error occurred and resulted in permanent patient harm	Error, harm
H	An error occurred that required intervention necessary to sustain life	Error, harm
I	An error occurred and resulted in patient's death	Error, death