Updated July 2, 2026
For Mountain West states, Idaho holds up well on price. A Plan G here runs around $142 per month, which is relatively modest compared with neighboring states and well below what buyers in high-cost markets pay.
Things to Know About Medigap in Idaho
- Plan G in Idaho runs about $142 a month for a typical new enrollee, though age, sex, tobacco use and insurer all move that number.
- Every Plan G sold in Idaho covers the same federally standardized benefits, so price and rating method are what actually separate one carrier from another.
- Your 6 month Open Enrollment window in Idaho opens the month your Medicare Part B coverage starts, and no insurer can turn you down or charge more for health history during it.
- Miss that window in Idaho and carriers can medically underwrite new applications, which can mean a higher rate or a declined application.
Enrolling in Idaho
Idaho follows standard federal Medigap enrollment rules. The Open Enrollment Period is 6 months and begins the month your Medicare Part B starts. That window is the one time insurers cannot ask about your health or charge you more because of a medical condition. Once it passes, underwriting is back in play. The open enrollment calculator gives you your exact dates based on when your Part B begins. If you want to run the numbers on Medigap against a Medicare Advantage plan, the Medigap vs Advantage calculator walks through both sides.
What you are actually buying with Plan G
Every insurer selling Plan G in Idaho is selling the same coverage. Federal standardization sets the benefits, so the policy from a small regional carrier pays out the same way as the one from a national name. That makes price the deciding factor. Idaho's market is smaller than urban states, which means fewer carriers to compare. Even so, the spread between the cheapest and most expensive Plan G in the state can run $30 or more per month. The Medigap cost calculator shows estimates by age, and the plan comparison covers what each letter plan includes.
FAQs
How much does Medigap Plan G cost in Idaho?
Plan G premiums in Idaho run around $142 a month for most new enrollees, though your exact rate depends on your age, sex, tobacco use and the insurer you choose.
When can I enroll in Medigap in Idaho without medical underwriting?
Your 6 month Medigap Open Enrollment period in Idaho starts the month your Medicare Part B coverage begins, and no insurer can deny you or charge more based on health history during that window.