| Code | Description | Deutsch (German) | Version |
| CDM | Charge description master file | Leistungskatalog | added v2.2 |
| CLN | Clinic master file | | added v2.4 |
| CM0 | Clinical study master | | added v2.3, removed after v2.3 |
| CM1 | Clinical study phase master | | added v2.3, removed after v2.3 |
| CM2 | Clinical study Data Schedule Master | | added v2.3, removed after v2.3 |
| CMA | Clinical study with phases and scheduled master file | | added v2.3.1 |
| CMB | Clinical study without phases but with scheduled master file | | added v2.3.1 |
| INV | Inventory master file | | added v2.5 |
| LOC | Location master file | | added v2.3 |
| MACP | Medicare Approved Coverage Process | | added v2.8.2 |
| MLCP | Medicare Limited Coverage Process | | added v2.8.2 |
| OM1 | Observation text master file segments (e.g., Lab) | | added v2.2, removed after v2.3 |
| OM1-OM6 | Observation text master file segments (e.g., Lab) | | added v2.3, removed after v2.3 |
| OM2 | Observation text master file segments (e.g., Lab) | | added v2.2, removed after v2.3 |
| OM3 | Observation text master file segments (e.g., Lab) | | added v2.2, removed after v2.3 |
| OM4 | Observation text master file segments (e.g., Lab) | | added v2.2, removed after v2.3 |
| OM5 | Observation text master file segments (e.g., Lab) | | added v2.2, removed after v2.3 |
| OM6 | Observation text master file segments (e.g., Lab) | | added v2.2, removed after v2.3 |
| OMA | Numerical observation master file | | added v2.3.1 |
| OMB | Categorical observation master file | | added v2.3.1 |
| OMC | Observation batteries master file | | added v2.3.1 |
| OMD | Calculated observations master file | | added v2.3.1 |
| OME | Other Observation/Service Item master file | | added v2.4 |
| OMM | Mixed type observation master file | | added v2.8.2 |
| PRA | Practitioner master file | Ärztekatalog | added v2.2 |
| STF | Staff master file | Mitarbeiterkatalog | added v2.2 |