Maverick,
If you Kaiser experience is anything like my years of Kaiser and Post Concussion, you will do well to pursue other avenues. Kaiser's system is great for normal illnesses and injuries but fails miserably with PCS. Most health care systems do.
You need to find help specific to brain injury and concussion. Your state brain Injury Association may be a good resource. Check
http://www.biausa.org/state-affiliates.htm
Before you get too far into a Worker's Comp claim, you should find a WC attorney who truly understands mTBI. The WC system can be problematic for the uninformed and unrepresented injured worker.
Check out
www.tbilaw.com for a referral and good information.
Where do you live? Maybe I can do some research for you.
My best to you.