This case-insensitive code system http://hl7.org/fhir/v2/0483 defines the following codes:
| Code | Display | Nederlands (Dutch, nl) |
| EL | Electronic | Electronisch |
| EM | E-mail | E-mail |
| FX | Fax | Fax |
| IP | In Person | In persoon |
| MA | Mail | Post |
| PA | Paper | Papier |
| PH | Phone | Telefoon |
| RE | Reflexive (Automated system) | Reflexief (geautomatiseerd systeem) |
| VC | Video-conference | Videoconferentie |
| VO | Voice | Stem |