Turning 65 in Late 2026? Your Medicare Timeline
If your 65th birthday is September through December, the window that matters is your Initial Enrollment Period. Annual Enrollment is a different door, for people who already have Medicare.
By Timothy Jones, licensed independent Medicare agent · · 7 min read
The short answer
Your Initial Enrollment Period is seven months: the three months before your birthday month, the birthday month, and the three months after. Enroll in those first three months if you want coverage the month you turn 65. Annual Enrollment (October 15 – December 7, 2026) does not replace that window.
I already wrote the summer 2026 timeline for June, July, and August birthdays. This is the same rule for the people whose IEP runs through the fall and into early 2027 — and who keep getting told, wrongly, that they should “just wait for open enrollment.”
Your dates
| Birthday month | Initial Enrollment Period | Earliest coverage if you enroll in the first three months |
|---|---|---|
| September 2026 | June 1, 2026 – December 31, 2026 | September 1 if you enroll in June, July, or August |
| October 2026 | July 1, 2026 – January 31, 2027 | October 1 if you enroll in July, August, or September |
| November 2026 | August 1, 2026 – February 28, 2027 | November 1 if you enroll in August, September, or October |
| December 2026 | September 1, 2026 – March 31, 2027 | December 1 if you enroll in September, October, or November |
If your birthday is on the 1st of the month, use the row above yours. Medicare counts you as turning 65 the prior month.
Annual Enrollment is not your first signup
October 15 – December 7, 2026 is when people who already have Medicare Advantage or Part D can change that coverage for 2027. It is a busy season in Clark County, and it is easy to hear “enrollment is open” and assume that is your deadline.
If you are new to Medicare, missing the IEP is the expensive mistake. Part B late enrollment is a permanent surcharge for as long as you keep Part B, unless you qualified for a delay. Waiting for December 7 because a neighbor is shopping plans is how that happens.
What to do this week
- 01
Confirm whether you need Part B now
If you or a spouse is still working and the employer has 20 or more employees, you may be able to delay Part B. Get that in writing from the employer or the plan. A card that says “Medicare” on it is not the same as creditable coverage.
- 02
Create your my Social Security account if you do not have one
Most people enroll in Part A and Part B online at SSA.gov, or in person at the Vancouver Social Security office. The account is what makes the online path possible.
- 03
Write down prescriptions and doctors
Same two lists I ask everyone to bring. Drug name and strength, and every doctor plus the hospital you would want. That work does not depend on 2027 plan details being public.
- 04
Book a review for after October 1
We can schedule now. Before October 1 the appointment is your IEP timeline and your current coverage. After October 1 we can look at Advantage, Supplement, and Part D options against those two lists.
Get the dates on paper
Bring your birthday, your work situation, and the two lists. Thirty minutes. No cost, and no obligation to enroll in anything with me.
📅 Book in 30 secondsOr call (360) 472-4261
Questions
Is Annual Enrollment my signup window if I turn 65 this fall?+
No. Annual Enrollment (October 15 – December 7) is for people who already have Medicare and want to change Advantage or Part D coverage for next year. If you are new to Medicare, you use your Initial Enrollment Period, which is tied to your 65th birthday, not to the calendar.
What if my birthday is on the first of the month?+
Medicare treats you as turning 65 the previous month. Someone born October 1 uses the September timeline. That is a CMS rule, not a local quirk — it moves both the start of your IEP and the earliest coverage date one month earlier.
Can I wait and sign up during Annual Enrollment instead?+
Not for your first Part A and Part B enrollment. Missing your IEP can mean delayed coverage and, for Part B, a late-enrollment penalty that lasts as long as you have Part B. Annual Enrollment does not replace the IEP.
I am still working. Do I have to enroll at 65?+
Part A is usually free if you or a spouse paid Medicare taxes long enough, and many people take it at 65 even while working. Part B can often wait if you have creditable employer coverage from a job with 20 or more employees. That exception is specific. Do not assume a small-employer plan or a retiree plan qualifies — check before you skip Part B.
Does turning 65 during Annual Enrollment let me pick a 2027 Advantage plan early?+
Your IEP is for joining Medicare. Specific 2027 plan benefits and premiums cannot be discussed before October 1. After that date we can look at Advantage, Supplement, and Part D options that actually fit your doctors and prescriptions. Booking the appointment now is allowed.
Keep reading
- Turning 65 this summer: the June–August timeline
- Prep checklist before enrollment opens
- Medicare in 2027: what changes
IEP dates verified August 31, 2026 against the standard CMS seven-month window. Annual Enrollment runs October 15 – December 7 each year.
Disclaimer: American Senior Choices is not affiliated with or endorsed by the U.S. government or the federal Medicare program. We do not offer every plan available in your area. Currently we represent 5 organizations which offer 33 products in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.