This case-sensitive code system http://terminology.hl7.org/CodeSystem/condition-category defines the following codes:
| Code | Display | Definition |
| problem-list-item | Problem List Item | An item on a problem list that can be managed over time and can be expressed by a practitioner (e.g. physician, nurse), patient, or related person. |
| encounter-diagnosis | Encounter Diagnosis | A point in time diagnosis (e.g. from a physician or nurse) in context of an encounter. |