| Code | Description | Version | 
| <  | Below absolute low-off instrument scale | from v2.1 | 
| >  | Above absolute high-off instrument scale | added v2.2 | 
| A  | Abnormal (applies to non-numeric results) | from v2.1 | 
| AA  | Very abnormal (applies to non-numeric units, analogous to panic limits for numeric units) | from v2.1 | 
| AC  | Anti-complementary substances present | added v2.7 | 
| B  | Better-use when direction not relevant | added v2.2 | 
| D  | Significant change down | from v2.1 | 
| DET  | Detected | added v2.7 | 
| H  | Above high normal | from v2.1 | 
| HH  | Above upper panic limits | from v2.1 | 
| I  | Intermediate. Indicates for microbiology susceptibilities only. | from v2.1 | 
| IND  | Indeterminate | added v2.7 | 
| L  | Below low normal | added v2.2 | 
| LL  | Below lower panic limits | from v2.1 | 
| MS  | Moderately susceptible. Indicates for microbiology susceptibilities only. | from v2.1 | 
| N  | Normal (applies to non-numeric results) | added v2.2 | 
| ND  | Not Detected | added v2.7 | 
| NEG  | Negative | added v2.7 | 
| NR  | Non-reactive | added v2.7 | 
| POS  | Positive | added v2.7 | 
| QCF  | Quality Control Failure | added v2.7 | 
| R  | Resistant. Indicates for microbiology susceptibilities only. | from v2.1 | 
| RR  | Reactive | added v2.7 | 
| S  | Susceptible. Indicates for microbiology susceptibilities only. | from v2.1 | 
| TOX  | Cytotoxic substance present | added v2.7 | 
| U  | Significant change up | from v2.1 | 
| VS  | Very susceptible. Indicates for microbiology susceptibilities only. | from v2.1 | 
| W  | Worse-use when direction not relevant | added v2.2 | 
| WR  | Weakly reactive | added v2.7 | 
| null  | No range defined, or normal ranges don't apply | from v2.1 |