Predesignation is still possible and highly encouraged. Once the City decides to implement a Medical Provider Network (MPN), you will only be able to seek treatment from a network of “Employer Chosen” doctors, unless you predesignate. The predesignated physician must have your medical history, have treated you in the past and agree to be predesignated. A Predesignation form needs to be filled out, signed and provided to your employer.