Document fields provide keys that you can use to file and retrieve documents and images in 
NextGen® Document Management. You can create the following field types: 
   
    - System fields, or key fields, that locate specific person information in the database. For example, when you specify a person number, the other system field data such as last name and first name are retrieved automatically. The key fields are: encounter number, person number, and MRN.
 
    - User defined fields that are not linked to any person demographic values. You can enter any value you want for a user-defined field.
 
   
   
  
 
  Set up the document types. For more information, go to 
Set Up Document Types.