Idaho has a Medicare Advantage enrollment population across its markets, and Humana has been an active carrier in certain Idaho areas. Members in affected Idaho areas who receive a plan termination or non-renewal notice have federal guaranteed-issue rights to enroll in certain Medicare Supplement plans — without medical underwriting.
Idaho has a state Birthday Rule that provides an annual open enrollment window for Medicare Supplement plans. Under Idaho's Birthday Rule, you may be able to switch to a Medicare Supplement plan of equal or lesser benefit during a window around your birthday each year — without medical underwriting. However, the federal guaranteed-issue right triggered by a Humana plan termination is a separate and distinct protection that applies regardless of your birthday. If your plan is terminating, the federal GI window is the most immediate and relevant protection.
Plan G is the most commonly selected Medicare Supplement plan for new enrollees in Idaho in 2026. Eligible beneficiaries whose Medicare Advantage plan is terminating may have a federal guaranteed-issue right to Plan G. Under the MACRA framework, Plan G is the applicable alternative to Plan F for people newly eligible for Medicare on or after January 1, 2020. An independent broker can confirm which plans you qualify for based on your specific termination notice.