Question isn't clear, but ordinarily Medicare is the primary payor and your retiree coverage is secondary.

If she or he wishes to.

how do you contact southwestern bell benefit office

To obtain a proof of income letter for a retiree of General Electric, you can contact the Human Resources or Pension Department at General Electric. They should be able to provide you with the necessary documentation verifying the retiree's income.

As a federal retiree with frozen CSRS, you need the military retirement document.