This code system http://ehealth.sundhed.dk/cs/usage-quality defines the following codes:
| Lvl | Code | Display | Definition |
| 1 | none | No quality needed | Quality value where no derivation rule logic nor values are expected |
| 2 | unknown | Unknown quality | Unknown quality (Unlikely to be adequate if a quality value is expected) |
| 3 | derivation-error | Error in deriving or determining the quality | Quality value could not be derived due to insufficient input, unknown/unavailable logic, or other error |
| 4 | normal | Normal/neutral usage quality | Normal/neutral usage quality |
| 5 | instructions-followed | Performed in accordance with instructions | Performed in accordance with instructions |
| 5 | instructions-not-followed | Performed without following instructions | Performed without following instructions |
| 5 | entered-manually | Manually entered measurement | Manually entered measurement |
| 5 | automatically-transferred | Automatically transferred measurement | Automatically transferred measurement |
| 1 | TBD | Example value - Under construction | Example value - Under construction |
| 1 | TBD2 | Example value2 - Under construction | Example value2 - Under construction |
