Legal Question in Workers Comp in California

If closed by Compromise & Release Agreement (which usually has language that all issues -- including treatment and mileage -- are resolved for that lump sum), then likely no.

If resolved by Stipulations With REquest ForAward, then yes...

either way, I always tell clients to do the mileage and send it in with a written request for prompt payment... if it's less than $100, sometimes adjusters just pay it to keep things quiet.