This just in from the Met News for California practitioners. 

Where minor entered a settlement agreement with a third party tortfeasor by and through a guardian ad litem, and court made an allocation of the medical expenses portion of the settlement in the order approving plaintiff’s compromise, trial court did not err in rejecting plaintiff's later motion to reduce the amount of Medi-Cal lien against settlement proceeds by the same percentage that the settlement bore to the overall value of plaintiff’s case. 

Espericuenta v. Shewry - filed July 1, 2008, Second District, Div. Two Cite as 2008 SOS 3901

Question:  how do you determine the "overall value" of the plaintiff's case in order to reduce the lien by the same percentage that the settlement bears to that value?  Declaration by the Plaintiff's attorney?  Anyone who's actually read this case, do let my readers know!