Some have written letters to their senators , governor and any other officials to try and explain to them about chronic pain and injury and how the "system" is not working properly.

If you check some of the older posts here you will find that info.

Some things that might help-
dr/drs notes, charts, testing- clearly written in a timetable format??
= your full history, diagnosis, and all symptoms as they appeared
and a clear firm statement of how the RSD is related/caused by the initial injury and how it is a long term diagnosis for the most part.

Do you have all copies of notes, charts, tests, bills.

I think very much depends of the reputation and knowledge of the dx'ing and tx'ing drs .{diagnosing/treating}
And how confidant & firmly they write the reports.

But that is just my take on it - many in CA all over really are having a lot of trouble getting chronic claims accepted.

Good luck - it is a tough thing to go thru.