Blue Cross Blue Shield of Texas Will Exit Medicare Advantage for 2027. Its October Nonrenewal Letter Will Open a Medigap Window That Runs Through March 4

A Texas retiree opens her Medicare Advantage mailing this month expecting the usual tweaks: a higher copay, maybe a specialist dropped from the network. What she finds is an ending. Blue Cross Blue Shield of Texas says it will no longer offer Medicare Advantage plans in Texas in 2027, and her plan’s coverage stops on December 31.

Her first impulse is to grab the cheapest replacement Advantage plan and move on. That move feels harmless. It can cost her something very valuable. The letter gives her a short stretch of time when a Medigap insurance company must sell her a supplement without asking a single health question. Members whose cards carry another carrier’s name can file this away, while members whose cards say Blue Cross are on the clock now.

A Plan Exit Opens a Door Most Members Never Get

Most people who join Medicare Advantage and later want Original Medicare with a supplement run into medical underwriting. Outside a protected window, a Texas Medigap insurance company can review health history, raise the price, or decline the application, leaving a 72-year-old with diabetes or a heart condition who left Original Medicare years ago with no realistic way back.

A plan termination changes that math. If she does not enroll in another Advantage plan, coverage ending December 31 returns her to Original Medicare. And because her plan is leaving, federal rules give her a guaranteed-issue right to Medigap if she makes that move. The insurance company must sell her a policy, including Plan G, cannot price it on her health, and cannot impose a waiting period for preexisting conditions.

Your Medigap Clock Starts Before the Plan Ends

Because her Advantage plan is ending involuntarily, the Medigap guarantee begins when she receives the nonrenewal notice and runs through 63 days after coverage ends. With coverage stopping December 31, the federal window runs through March 4.

Applying early carries no penalty. She can apply in November and ask for the policy to take effect when her Advantage coverage ends, so the two never overlap and nothing lapses. The carrier may ask her to prove the right exists, and the nonrenewal letter serves as that proof, so she should keep it somewhere safe rather than throwing it with the rest of the fall plan mail.

Original Medicare Leaves Two Holes Open

Landing in Original Medicare restores Parts A and B and nothing more. Her Advantage plan included drug coverage; Original Medicare does not, so she needs to choose a stand-alone Part D plan herself. Going 63 days or more without creditable drug coverage can saddle her with a Part D late enrollment penalty that generally follows her for as long as she has Part D.

Without Medigap, she also carries Original Medicare’s cost sharing alone, with no annual out-of-pocket cap. The Part A hospital deductible is $1,736 per benefit period in 2026, and it resets with each new benefit period, so two separate hospitalizations in one year can mean two deductibles. A skilled nursing stay costs $217.00 per day in coinsurance for days 21 through 100. Part B adds a $283 annual deductible. She also keeps paying the Part B premium, $202.90 a month in 2026, whichever path she picks (we listed these line items alongside the IRMAA surcharges and coverage gaps that catch retirees off guard in a free Medicare guide).

Compare the Two Paths Before the Window Closes

The real comparison is a replacement Advantage plan versus Original Medicare paired with Part D and, if she wants it, Medigap. Advantage often carries the lower monthly premium. Original Medicare with a supplement usually gives her wider provider access and far fewer prior-authorization hurdles. In a sick year, the network and the approval process decide what she actually pays and who treats her.

For someone managing chronic conditions or seeing specialists regularly, the guaranteed-issue window is worth pricing before it closes. Someone focused on keeping monthly premiums low may still prefer another Advantage plan, but the choice gets much harder to undo once March 4 passes and underwriting returns.

She does not have to choose immediately, but she does need to preserve both options while the guarantee is still available. Three steps keep both doors open:

1. Get Medigap quotes in November. Apply inside the window and ask for coverage to start the day the Advantage plan ends. Attach a copy of the nonrenewal letter.
2. Run your full drug list through Medicare’s Plan Finder for stand-alone Part D plans and for every replacement Advantage plan you are considering.
3. Call your doctors’ billing offices and your preferred hospital to confirm they participate in any replacement Advantage plan before you let the Medigap option expire.

The exit letter shuts down one plan. It also opens a guarantee most Advantage members never get again, and for anyone whose health could change, that window may be worth more than the plan she is losing.

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