WORD 2013 and appendix

I have a document with a table of contents.

On this TOC, I have several chapters, when I want oto create a new chapter, I simply copy a previous chapter heading, and paste it towards the end of the document, and then I reformat the TOC.  So I have a TOC that looks something like:

Intro
Chapter 1
Chapter 2
Chapter 3
Summary

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So if I want to add an appendix,, do I simply cut and past a previous chapter heading, or  are appendixes handled differently.

If they are handled differently, what path do I take to create an appendix

Thanks