Agree with Michele and Linda, 400% is WAY too high. Why would the provider want to "sticker shock" patients with prices like that? I too would not choose to see this provider, even if they were in network with my insurance, because I can't tolerate business practices like that. While I am all about fair reimbursement for providers, there is a difference between fair, and outrageous.
My personal approach to setting a fee schedule (none of my providers do WC claims) is to every year get Medicare's fee schedule, and the fee schedule of my highest payer (BCBS) and whichever of them has the highest allowed amount for a code, I take that number, and round up to the nearest whole dollar amount. So $78.23 for a 99213 is set at $80.00. That keeps the adjustments down, the AR in line, and the patients from freaking out when they see their EOB's.