Dental insurance is offered with two options. Both options provide 100 percent coverage for preventive care.   Benefits levels are higher in the “Plus Plan.”  UMass Chan pays 100 percent of the premium for the “Basic Plan.”  Residents pay a share of the premium costs for the “Plus Plan.”  You must enroll as a new hire during your first 31 days of employment, otherwise, you may enroll during the open enrollment period held annually every April/May. NOTE: Certain life change events (marriage, divorce, birth or adoption of child) may enable you to enroll other than as a new hire or during open enrollment.