I believe what you need is a PageRef to a bookmark.
From Allen Wyatt on tips.net
Word includes the capacity to add cross-references to page numbers in your document. For instance, you can insert a field that will automatically refer to a bookmark on another page. If the page number containing the bookmark changes, the page number cross-reference changes as well. To insert a page number cross-reference, follow these steps:
Insert a bookmark on the page containing the information you want to cross-reference.
Position the insertion point where you want the cross-reference to occur.
Press Ctrl+F9 to insert field brackets. Make sure the insertion point stays between the brackets.
Type pageref followed by the bookmark name used in step 1.
Press F9 to update the field information.
https://word.tips.net/T000957_Inserting_Page_Number_Cross-References.html