I started writing back...but lost the post. So, I hope I don't 'double' post.

Anyways, technically they don't have to hold your job after 12 weeks. But its my understanding that they also must have a more 'justified' reason for letting you go, like general budget cuts (where many positions are laid off) or company restructuring (they resign that role within the company).

I don't think its as easy as just letting you go on week 13 -- b/c they can and then simply replacing you with someone else.

When my issue first started, I was out for over a year. My company held my job and I came back...and I still work there now...

If they know you are definitely planning on coming back at week 16 - most companies will accomodate that....

hope your recovery is going well....