When you go to the doctor, it's always important to provide your UC-sponsored medical plan card to your doctor's office. This will ensure that your doctor's office has the most up-to-date information on your medical plan benefits and that billing is as accurate as possible. Even if you or a family member has Medicare, show your UC-sponsored medical plan card -- not your Medicare card -- to ensure that your doctor's office bills correctly. As an employee, your UC medical plan provides your primary insurance, not Medicare.