This code system http://nccn.org/fhir/CodeSystem/action-type defines the following codes:
| Code | Display | Definition |
| regimenOption | regimen option | One option for the regimen specified on this order template |
| regimenPart | regimen part | Regimen can be split into different courses or parts within a single template |
| cycleDefinition | cycle definition | Each regimen part has one or more cycle definitions |
| regimenEntryGroup | regimen entry group | When a regimen entry includes optionality such as a dosage option, these options will be grouped under a common regimen entry group |
| regimenEntry | regimen entry | A single medication, possibly with dosage instruction optionality, within the given regimen |
| dosageGroup | dosage group | When a regimen entry includes dosage optionality such as a route option (e.g. PO/IV), each option will be included within a single dosage group |
| dosage | dosage | A single medication and dosage |
