| Segment | Ebene | Beschreibung | Opt/Mand. | 
| UNH | 0 | A service segment starting and uniquely identifying a message. The message type code for the Person identification message is MEDPID. Note: Person identification messages conforming to this document must contain the following data in segment UNH, composite S009: Data element  0065 MEDPID D A UN | Mandatory | 
| BGM | 0 | A segment for specifying message name and function. | Mandatory | 
| DTM | 0 | This segment is used to specify the date and time for generation of the message. | Optional | 
| RFF | 0 | This segment contains references to other related messages or documents concerning the whole message. | Optional | 
| FTX | 0 | This segment is used to transfer textual information concerning the message itself. | Optional | 
| SG1 | 0 | SG1 | Optional | 
| PNA | 1 | A segment identifying name and identification of a communication party (i.e. sender and receiver), and other parties associated with the message. | Mandatory | 
| ADR | 1 | A segment to specify the addresses of the actual communication party. | Optional | 
| CTA | 1 | A segment identifying a contact person or department for the actual communication party to whom communication should be directed. | Optional | 
| COM | 1 | A segment identifying communication type(s) and number(s) of the actual communication party or contact person or department. | Optional | 
| RFF | 1 | A segment specifying other identification numbers of the actual communication party. | Optional | 
| LAN | 1 | A segment specifying languages used by the actual communication party. | Optional | 
| SG2 | 0 | SG2 | Optional | 
| GEI | 1 | The segment is used to specify the type of data transferred and the subsequent action assumed to be taken by the receiver such as: new data to be added (i.e. birth) old data to be deleted (i.e. death) modified data (i.e. marriage, address changes) data to be verified. | Mandatory | 
| PNA | 1 | A segment identifying a person. | Optional | 
| ADR | 1 | A segment specifying the addresses of the actual person. One person may have more addresses. | Optional | 
| RFF | 1 | A segment to specify alternate identification numbers of the actual person. | Optional | 
| DTM | 1 | A segment identifying the date and time of birth and/or death of the actual person as well as the date to perform the requested action (add, delete, change, verify). | Optional | 
| IHC | 1 | A segment for specifying person inherited characteristics such as ethnic origin, hair colour, etc. of the actual person. | Optional | 
| NAT | 1 | A segment for specifying the nationality of the actual person. | Optional | 
| FTX | 1 | A segment for free text information concerning the actual person such as further unstructured person information. | Optional | 
| LAN | 1 | A segment for specifying the languages used by the actual person. | Optional | 
| HAN | 1 | A segment for specifying confidentiality constraints concerning the data of the actual person. | Optional | 
| LOC | 1 | A segment specifying place of birth and/or death of the actual person. | Optional | 
| FII | 1 | A segment identifying the financial institution(s) and bank account number(s) associated with the actual person. | Optional | 
| CTA | 1 | A segment identifying a person that serves as a contact for the actual person. | Optional | 
| SG3 | 1 | SG3 | Optional | 
| PDI | 2 | A segment to specify the sex, marital status and religion of the actual person. | Mandatory | 
| DTM | 2 | A segment for specifying the valid date/time/period for the person demographic information. | Optional | 
| SG4 | 1 | SG4 | Optional | 
| COM | 2 | A segment identifying communication type(s) and number(s) of the actual person. | Mandatory | 
| CTA | 2 | A segment identifying a contact person or department at the specified communication number. | Optional | 
| SG5 | 1 | SG5 | Optional | 
| REL | 2 | A segment identifying the type of relationship of the related person or name to the actual person. | Mandatory | 
| PNA | 2 | A segment identifying the related person or specifying related name(s). | Optional | 
| ADR | 2 | A segment for specifying address information of the related person. | Optional | 
| RFF | 2 | A segment identifying additional identification numbers of the related person. | Optional | 
| DTM | 2 | A segment identifying the time of birth and/or death of the related person. | Optional | 
| PDI | 2 | A segment to specify the sex, marital status and religion of the related person. | Optional | 
| IHC | 2 | A segment for specifying person inherited characteristics such as ethnic origin, hair colour, etc. of the related person. | Optional | 
| NAT | 2 | A segment for specifying the nationality of the related person. | Optional | 
| LAN | 2 | A segment for specifying the languages used by the related person. | Optional | 
| SG6 | 0 | SG6 | Optional | 
| AUT | 1 | A segment specifying details of any authentication (validation) procedure applied to the message. | Mandatory | 
| DTM | 1 | A segment for specifying the date/time of an authentication procedure. | Optional | 
| UNT | 0 | A service segment ending a message, giving the total number of segments in the message (including the UNH & UNT) and the control reference number of the message. | Mandatory |