| 42547-0 | Event MERSTH | required |
| 42548-8 | Service MERSTH | required |
| 42549-6 | Event Type MERSTH | required |
| 42550-4 | Event Desc med MERSTH | required |
| 42551-2 | Event Desc proc/Tx/surgery MERSTH | required |
| 42552-0 | Event Desc food/nutrition MERSTH | required |
| 42553-8 | Event Desc fall MERSTH | required |
| 42554-6 | Event Desc accident MERSTH | required |
| 42555-3 | Event Desc general nursing care MERSTH | required |
| 42556-1 | Event Desc equipment/device MERSTH | required |
| 42557-9 | Event Desc lab MERSTH | required |
| 42558-7 | Event Desc transfusion service MERSTH | required |
| 42559-5 | Event Desc admin MERSTH | required |
| 42560-3 | Event Desc complaint MERSTH | required |
| 42561-1 | Event Desc envir hazard/safety MERSTH | required |
| 42562-9 | Evnt Dsc crime/intnt hrm/Pt disp MERSTH | required |
| 42563-7 | Event Desc AE MERSTH | required |
| 42564-5 | Contrib Fact technical MERSTH | required |
| 42565-2 | Contrib Fact organization MERSTH | required |
| 42566-0 | Contrib Fact communication/doc MERSTH | required |
| 42540-5 | Contrib Fact environment MERSTH | required |
| 42541-3 | Contrib Fact patient-related MERSTH | required |
| 42542-1 | Contrib Fact staff-related MERSTH | required |
| 42543-9 | Contrib Fact delay/premature MERSTH | required |
| 42544-7 | Contrib Fact other MERSTH | conditional |
| 42545-4 | Event Outcome MERSTH | required |
| 42546-2 | Event Battery.MERS-TH MERSTH | |