https://www.thebalance.com/current-and- ... ms-2388483 https://www.thebalance.com/current-and- ... ms-2388483 https://www.thebalance.com/current-and- ... ms-2388483 https://www.thebalance.com/current-and- ... ms-2388483 https://www.thebalance.com/current-and- ... ms-2388483 https://www.thebalance.com/current-and- ... ms-2388483 https://www.thebalance.com/current-and- ... ms-2388483 https://www.thebalance.com/current-and- ... ms-2388483 monthly premium for existing retirees https://www.thebalance.com/current-and- ... ms-2388483 https://www.thebalance.com/current-and- ... ms-2388483 https://www.thebalance.com/current-and- ... ms-2388483 https://www.thebalance.com/current-and- ... ms-2388483 Part B