| Membership Code | Concept Code | Description | Code System | Code System Version |
|---|---|---|---|---|
| EDI | EDI | Electronic Data Interchange | HDR Supplemental | HDR Supplemental (2005-07-28) |
| EFT | EFT | Electronic File Transfer Format Communications | HDR Supplemental | HDR Supplemental (2005-07-28) |
| SMS | SMS | SMS | HDR Supplemental | HDR Supplemental (2005-07-28) |
| TLX | TLX | Telex | HDR Supplemental | HDR Supplemental (2005-07-28) |
| fax | fax | Fax | URLScheme | 2.01.4 |
| file | file | File | URLScheme | 2.01.4 |
| ftp | ftp | FTP | URLScheme | 2.01.4 |
| http | http | HTTP | URLScheme | 2.01.4 |
| mailto | mailto | Mailto | URLScheme | 2.01.4 |
| mllp | mllp | mllp | URLScheme | 2.01.4 |
| modem | modem | Modem | URLScheme | 2.01.4 |
| nfs | nfs | NFS | URLScheme | 2.01.4 |
| tel | tel | Telephone | URLScheme | 2.01.4 |
| telnet | telnet | Telnet | URLScheme | 2.01.4 |