Hi Julie

Assuming that you have used a paragraph style for each Appendix heading, you
can use a STYLEREF field to pick up the text of the style.

Look up Word's help for full info on the STYLEREF field.

The following might also be useful:
How to number headings and figures in Appendixes in Microsoft Word
http://www.ShaunaKelly.com/word/numbering/NumberingAppendixes.html

Hope this helps.

Shauna Kelly.  Microsoft MVP.
http://www.shaunakelly.com/word