| I Who: Who was/were the ameliorator/s (can code multiple, if needed) | 
1: Patient/Patient‐Related | 
Patient, family member, patient representative | 
| 2: Clinician | 
Physician, physician's assistant, nurse practitioner | 
| 3: Nurse | 
RN, MA, LPN | 
| 4: Office staff | 
Front office staff, billing, administration, or medical records | 
| 5: Lab or lab personnel | 
Laboratory technician | 
| 6: Pharmacy or pharmacist | 
Pharmacist, pharmacy technician | 
| 7: Radiology/radiology tech | 
Radiologists, radiology technician | 
| 8: Other | 
Any other person not in the above categories | 
| II What: (a) Was the amelioration expected, typical action; OR unexpected above and beyond. If patient was the ameliorator, no code needed. | 
A: Most people, most times | 
Most people, most of the time would take this action; it would be expected for most people to do this under the event circumstances. | 
| B: Over and above | 
The action taken is exceptional and goes above and beyond what would normally expect (“Wow! I didn't expect that”) | 
| C: Insufficient information | 
Use to indicate there seems to be insufficient information to code the event in this domain. | 
| III What: (b) What exactly did the ameliorator do (eg, phone call, double‐check, asked questions, etc) | 
[open code or in vivo code] | 
Descriptive codes to get a sense of types of things people do when they ameliorate (eg, phone call, asked extra questions, double‐checked, actually followed protocol) | 
| IV When: At what point in the process (ie, the entire loop for an event procedure or activity) did the amelioration occur? | 
PRE | 
Amelioration took place before event process started (eg, system change to prevent a future error; corrected medical record to prevent future error) | 
| EARLY | 
Amelioration took place early in the event process (eg, MD noticed wrote wrong dose on Rx and corrected before patient left) | 
| MID | 
Amelioration took place in middle of process (eg, pharmacy noticed dose was wrong, clarified with clinic, then dispensed correctly) | 
| LATE | 
Amelioration took place late in event process (eg, patient noticed that dispense pills were different and clarified before taking) | 
| V. System change? | 
SYSTEM | 
Use to indicate a change made to system or protocol or practice (ie, implemented an office‐wide change), either as a part of the amelioration or as a result of the event |