| Code | Display | Definition |
| ACID | Acidification | The lowering of specimen pH through the addition of an acid |
| ALK | Alkalization | The act rendering alkaline by impregnating with an alkali; a conferring of alkaline qualities. |
| C | corrected | **Description:**Indicates that result data has been corrected. |
| DEFB | Defibrination | The removal of fibrin from whole blood or plasma through physical or chemical means |
| F | final | **Description:**Indicates that a result is complete. No further results are to come. This maps to the 'complete' state in the observation result status code. |
| FILT | Filtration | The passage of a liquid through a filter, accomplished by gravity, pressure or vacuum (suction). |
| LDLP | LDL Precipitation | |
| NEUT | Neutralization | The act or process by which an acid and a base are combined in such proportions that the resulting compound is neutral. |
| PRLMN | preliminary | **Description:**Indicates that a result is incomplete. There are further results to come. This maps to the 'active' state in the observation result status code. |
| RECA | Recalcification | The addition of calcium back to a specimen after it was removed by chelating agents |
| SREC | specimen received | **Description:**Specimen has been received by the participating organization/department. |
| SSTOR | specimen in storage | **Description:**Specimen has been placed into storage at a participating location. |
| STRAN | specimen in transit | **Description:**Specimen has been put in transit to a participating receiver. |
| UFIL | Ultrafiltration | The filtration of a colloidal substance through a semipermeable medium that allows only the passage of small molecules. |