| Code | Display | Definition |
| not-found | Not Found | An issue that identifies a code system or value set that was not found validating the code(s) |
| not-in-vs | Not in ValueSet | An issue that represents the value set validation failure |
| this-code-not-in-vs | This code not in valueset | An issue that indicates that a particular code as not in the value set (but others might be) |
| invalid-data | Invalid Data | An issue that indicates that the code/Coding/CodeableConcept provided was invalid |
| invalid-code | Invalid Code | An issue that indicates that a provided code is not valid in a code system |
| invalid-display | Invalid Display | An issue relating to the display provided for a code |
| cannot-infer | Cannot Infer System | An issue indicating why inferring the code system failed (for type=code) |
| code-rule | Code Rule | An issue indicating that a valid code was not valid in this context |
| vs-invalid | ValueSet Invalid | An issue relating to a problem processing a value set while validating |
| status-check | Status Check | An issue pertaining to the status of the underlying resources |