Where do I go to get medi-cal to sign off on a 3rd party check from auto insurance company for car accident ?

At the time of the accident medi-cal paid the hospital bills. Now the auto insurance company is issuing a settlement check but it is a 3rd party check issued to my husband, medi-cal and blue cross. They both have to sign off on it before it can be cashed. But no one seems to be able to tell me where I have to take it to get it signed off.