Beginning April 1, 2017, Anthem Blue Cross will adjust the base rates for existing business on all California Department of Insurance (CDI) grandfathered medical plans with an April 1, 2017 effective date. Members will also receive an adjustment for age changes. The base rates for members on Department of Manage Health Care (DMHC) grandfathered medical plans, that were effective April 1, 2016, are not scheduled to change in 2017. DMHC members will receive an adjustment for age changes.