Turning 65 in Utah · Your first-year do-over
Can I Switch Medicare Advantage Plans in My First 3 Months?
You turned 65, picked a Medicare Advantage plan, and a few weeks in you are not sure it was the right one. Maybe a specialist in Salt Lake is out of network, or a prescription costs more than you expected. Medicare does give new members a do-over. The catch, which most explanations get wrong, is when the clock starts.
The bottom line
- Yes, once. If you joined Medicare Advantage during your Initial Enrollment Period, you can switch to another Advantage plan or go back to Original Medicare with a drug plan.
- The clock starts with Medicare, not with your plan. The window runs from the month you have both Part A and Part B through the end of the third month. A plan that started a month or two after your Medicare leaves you less time. Join near the end of your enrollment period and there may be no window at all.
- The 12-month trial right is the bigger safety net. If you joined Advantage when first eligible at 65, you can drop it within 12 months, return to Original Medicare and buy any Medigap policy sold in Utah without health questions.
- Utah's birthday rule will not rescue you later. It only moves people who already have Medigap. After the trial year, leaving Advantage for Medigap usually means a health application.
The rule, in the regulation's words
The federal rule is 42 CFR § 422.62(a)(3)(ii): "a newly MA eligible individual who is enrolled in a MA plan may change his or her election once during the period that begins the month the individual is entitled to both Part A and Part B and ends on the last day of the third month of the entitlement." The person can also make "a coordinating election to enroll in or disenroll from Part D," which is how you add a stand-alone drug plan when you leave Advantage for Original Medicare.
Medicare.gov says the same thing in plain English: if you joined a Medicare Advantage plan during your Initial Enrollment Period, "you can change to another Medicare Advantage Plan (with or without drug coverage) or go back to Original Medicare (with or without a drug plan) within the first 3 months you have Medicare Part A and Part B." The change starts the first of the month after the new plan gets your request.
Notice what both sentences measure from. Not the date you enrolled. Not the date your plan's card arrived. The month you first have Part A and Part B. Several carrier and comparison sites describe this as three months "after you enrolled," and for many people that gives them a later date than the real one.
Same birthday, four different windows
CMS's 2027 enrollment guidance uses a woman with a June 20 birthday whose Part A and Part B start June 1. Her window to choose an Advantage plan at all runs March 1 to September 30. Her do-over window runs June 1 to August 31, no matter when inside the first period she picks a plan. Here is what that does to the time she actually has in the plan before deciding:
| She enrolls in Advantage | Plan starts | Do-over window | Time in the plan to decide |
|---|---|---|---|
| Before June (in the 3 months before your birthday month) | June 1 | June 1 – August 31 | 3 months |
| In June | July 1 | June 1 – August 31 | 2 months (CMS's own example) |
| In July | August 1 | June 1 – August 31 | 1 month |
| In August or September | September 1 or October 1 | Already over | None. Next chances: Oct 15 – Dec 7, then Jan 1 – Mar 31 |
Sources: CMS CY 2027 enrollment guidance § 30.2 (the March 1 – September 30 example) and § 30.4 ("Mrs. Jenkins' MA OEP ... June 1–August 31" for a July 1 plan start); 42 CFR § 422.62(a)(3)(ii). Rows three and four apply the same rule to later plan start dates.
The lesson for anyone still inside their enrollment period: pick early if you want room to change your mind. A plan chosen in the three months before your birthday month starts with your Medicare and gets the full three months. A plan chosen in the last weeks of your enrollment period starts after the do-over window has already closed. You are not stuck forever, because the trial right below and the regular fall Open Enrollment still apply. But the quick three-month exit is gone.
Working past 65? Your window waits for Part B
If you kept an employer plan and signed up for Part B later, the window waits for you. CMS's second example is a man who turned 65 in April 2020 with Part A, kept working, and started Part B May 1, 2021. He joined an Advantage plan June 1, 2021, and his window was "May 1, 2021, through July 31, 2021." The rule follows the first month you have both parts, whenever that is. Our post on Medicare at 65 while still working in Utah covers the Part B timing itself.
What the three months let you do, and what they do not
- Switch to a different Advantage plan, with or without drug coverage. One change; CMS says the change starts the "first of the month following the plan's receipt of the enrollment request."
- Leave Advantage for Original Medicare, and join a stand-alone drug plan for the same start date.
- It does not cover Original Medicare members. CMS's guidance says that during this window people "may not ... Switch from Original Medicare to join an MA plan" or "Make Part D plan changes if enrolled in Original Medicare." If you chose Original Medicare and a drug plan at 65, your next regular change is Open Enrollment, October 15 to December 7.
- It does not buy you a Medigap policy. Getting back to Original Medicare is the easy part. Whether you can add Medigap without health questions depends on the two rules in the next section.
Before your plan starts, the rules are looser. CMS's guidance says "the last enrollment choice made, determined by plan receipt date, will be the choice that becomes effective." If you enroll in May for a June 1 start and change your mind in mid-May, the newer request generally replaces the first.
Not sure the plan you picked fits?
Send us your Part A and Part B start dates and your plan's start date. We will tell you which windows are still open for you, check your doctors and prescriptions against the plans we offer in your county, and lay out what a switch would involve, including Medigap. Free, by phone anywhere in Utah.
Book a Turning-65 call →The longer safety nets: the trial right and Medigap Open Enrollment
For a 65-year-old, the three-month window is not the only exit. Up to four rules can be running at the same time in your first year:
| Rule | Who has it | The clock | What it lets you do |
|---|---|---|---|
| New-member Medicare Advantage window 42 CFR § 422.62(a)(3)(ii) | Joined Medicare Advantage when first eligible | Month you have both A and B, through the end of the third month | One switch to another Advantage plan, or back to Original Medicare with a drug plan |
| Trial right 42 U.S.C. § 1395ss(s)(3)(B)(vi); Medicare.gov SEP page | Joined Medicare Advantage when first eligible at 65 | 12 months from the plan's start date | Back to Original Medicare, with the right to buy any Medigap policy sold in Utah |
| Medigap Open Enrollment Medicare.gov | Anyone 65 or older with Part B | 6 months from the first day of the month Part B starts | Buy any Medigap policy, and switch policies, without health questions |
| Open Enrollment Medicare.gov | Everyone with Medicare | October 15 – December 7 each year | Any plan change, effective January 1 |
The trial right is the one that protects your options. Federal law, 42 U.S.C. § 1395ss(s)(3)(B)(vi), covers someone who, "upon first becoming eligible for benefits under part A at age 65, enrolls in a Medicare+Choice plan" and leaves "not later than 12 months after the effective date of such enrollment." Medicare.gov's Special Enrollment Periods page says you can "drop your Medicare Advantage Plan and you'll automatically switch back to Original Medicare," with "special rights to buy a Medigap policy for a limited time," and that the chance "lasts for 12 months after you join the Medicare Advantage Plan for the first time." Its Medigap tool says the right covers "any Medigap policy that's sold by an insurance company in your state."
Note the difference. The three-month window lets you move to another Advantage plan. The trial right only takes you back to Original Medicare, but it brings the Medigap right with it, for a full year. A Utah 65-year-old who joins Advantage on June 1 and decides in February that they want Plan G instead still has that right through the end of May.
If you chose Original Medicare and Medigap at 65, your safety net is Medigap Open Enrollment, "the 6-month period that starts the first day of the month you're 65 or older and signed up for Part B." Inside it, Medicare.gov says that if you "decide you don't like the policy during this period, you can switch to a different Medigap policy," with a "30-day free look" on the new one. Keep the first policy until you are sure about the second; you pay both premiums for the overlap month. Our Medigap Open Enrollment post works out the dates by birthday.
Why Utah's birthday rule does not help here
Utah is one of the states with a Medigap birthday rule, and people sometimes assume it is a general way back to Medigap. It is not. It lets someone who already has a Medigap policy move to another Medigap plan around their birthday each year. A Medicare Advantage member has no Medigap policy to switch from, so the rule does not reach them. We covered that in detail in our birthday-rule and Medicare Advantage post. For a Utah 65-year-old, that makes the first year the important one: the trial right is the federal way back to Medigap without health questions, and once the 12 months pass, an insurer can ask about your health.
What I would do
- Write down three dates: the month your Part A and Part B started, the date your Advantage plan started, and the 12-month mark from that plan start. The Turning 65 page works out your enrollment window from your birthday.
- Test the plan in the first weeks. Call your doctors' offices and ask whether they take the plan, and price your prescriptions at the pharmacy you use. Most problems show up in the first month.
- If something is wrong, decide which door you want. Another Advantage plan: use the three-month window if it is still open, or Open Enrollment this fall. Original Medicare with Medigap: use the trial right, and apply for the Medigap policy before you drop the Advantage plan so there is no gap.
- If your Medicare started this fall, remember Open Enrollment runs October 15 to December 7. A plan you joined for the last months of 2026 can change for 2027, so read its Annual Notice of Change as well.
I have helped people with Medicare for more than 22 years, and the first-year questions are the ones I most like to get early, while every door is still open. If you are not sure which of these rules applies to you, give us a call before the window you need closes.
How we know all this: the Medicare On Main Data Desk frames every article with public data — here, 42 CFR § 422.62 and 42 U.S.C. § 1395ss(s)(3)(B)(vi) as published on Cornell LII; CMS's CY 2027 Medicare Advantage and Part D Enrollment and Disenrollment Guidance (§§ 30, 30.2 and 30.4, including CMS's own worked examples); and Medicare.gov's joining-a-plan, Special Enrollment Periods, when-to-buy-Medigap and change-Medigap pages, all read October 14, 2026. The rows of the window table after CMS's July 1 example apply the same regulation to later start dates. This is education, not advice; confirm your own dates with your plan, Social Security or Medicare.gov, and compare plans with a licensed agent. We take no payment from any carrier to feature a plan.
Frequently asked questions
Can I switch Medicare Advantage plans in my first 3 months?
Yes, once, if you joined the plan during your Initial Enrollment Period. Medicare.gov says you can "change to another Medicare Advantage Plan (with or without drug coverage) or go back to Original Medicare (with or without a drug plan) within the first 3 months you have Medicare Part A and Part B." The federal rule, 42 CFR § 422.62(a)(3)(ii), allows one change during that window, and the new choice starts the first of the month after the plan gets your request.
When does the 3-month window start, the day my plan starts or the day Medicare starts?
The day Medicare starts. The regulation says the window "begins the month the individual is entitled to both Part A and Part B and ends on the last day of the third month." CMS's own example: Part A and Part B on June 1, a Medicare Advantage plan on July 1, window June 1 to August 31. Someone whose plan started later than their Medicare can have one month left, or none.
Can I change my Medicare Advantage plan if I don't like it?
Yes, at set times. A new member gets the three-month window above. Everyone in a Medicare Advantage plan can change during Open Enrollment, October 15 to December 7, for a January 1 start, and once during January 1 to March 31. If you joined Medicare Advantage when you were first eligible at 65, you also have 12 months from the plan's start to drop it and return to Original Medicare with the right to buy a Medigap policy. Outside those times you need a Special Enrollment Period, such as a move or the plan leaving your county.
Can I go back to Original Medicare and get a Medigap plan after trying Medicare Advantage at 65?
Yes, within 12 months, if this was your first Medicare Advantage plan and you joined when you were first eligible at 65. Medicare.gov's Special Enrollment Periods page says you can drop the plan and "automatically switch back to Original Medicare," with "special rights to buy a Medigap policy for a limited time." Its Medigap tool says that right covers "any Medigap policy that's sold by an insurance company in your state." After the 12 months, a Utah insurer can ask health questions.
I picked Original Medicare and a Part D plan at 65. Can I change the drug plan in the first 3 months?
Not under this rule. CMS's 2027 guidance says that during the Medicare Advantage open enrollment periods, people "may not ... Make Part D plan changes if enrolled in Original Medicare." Your next regular chance to change a stand-alone drug plan is Open Enrollment, October 15 to December 7. Before your coverage starts, though, you can still change your mind: CMS says the last enrollment request the plan receives before the start date is the one that takes effect.
Does Utah's birthday rule let me leave Medicare Advantage for Medigap?
No. Utah's birthday rule lets someone who already has a Medigap policy move to another Medigap plan each year around their birthday. It does not apply to a Medicare Advantage member. That is why the 12-month trial right matters so much for a 65-year-old in Utah who chooses Medicare Advantage first: it is the federal right to buy Medigap without health questions after trying Advantage.
Sources
- 42 CFR § 422.62 — Election of coverage under an MA plan (Cornell LII) — (a)(3)(ii) the newly eligible member's one change, from the month of Part A and Part B entitlement through the third month; (a)(3)(iii) the single-election limit.
- CMS — CY 2027 Medicare Advantage and Part D Enrollment and Disenrollment Guidance (PDF), §§ 30, 30.2, 30.4 — the June 1 – August 31 example; the delayed-Part-B example; no Part D changes for Original Medicare members; the March 1 – September 30 enrollment example; "the last enrollment choice made ... will be the choice that becomes effective."
- Medicare.gov — Joining a health or drug plan (enrollment periods) — "within the first 3 months you have Medicare Part A and Part B"; October 15 – December 7; January 1 – March 31.
- Medicare.gov — Special Enrollment Periods — the at-65 trial period: "12 months after you join the Medicare Advantage Plan for the first time."
- 42 U.S.C. § 1395ss(s)(3)(B)(vi) — the 12-month trial right (Cornell LII) — "not later than 12 months after the effective date of such enrollment."
- Medicare.gov — When can I buy Medigap? — "any Medigap policy that's sold by an insurance company in your state"; the 6-month Medigap Open Enrollment Period.
- Medicare.gov — Change Medigap policies (30-day free look) — switching inside Medigap Open Enrollment and the 30-day free look.
