Please go see a work comp attorney BEFORE you do anything about leaving your job.

Are you 100% sure that your job did not -

cause the problem
exacerbate the problem
accelerate the problem
contribute even 1% to the injury

Or, that your lay-off, termination - whatever,

is properly motivated and carried out
has NO interest in "losing" you - dead weight in their eyes or to avoid later accomodations or cost?

I could think of more, but a good work comp attorney FOR FREE should be able to address these questions for you according to the laws of your state.

Just fyi, meant with love, always...