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HomeMedicare 2026CaliforniaPasadenaPasadena at 65: the seven-month Medicare sign-up clock and how to use it

Medicare 2026

Pasadena at 65: the seven-month Medicare sign-up clock and how to use it

Turning 65 in Pasadena comes with a Medicare deadline most people have never had to think about before — a seven-month window built around your birthday that decides when your coverage starts and whether you pay lifelong late penalties. Miss it, and your options narrow. Use it well, and the rest of your Medicare journey gets a lot easier.

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Key takeaways

  • Your Initial Enrollment Period is seven months long: the three months before your 65th birthday month, the birthday month itself, and the three months after.
  • Signing up in the three months before you turn 65 helps your coverage start the month you become eligible, with no gap.
  • Missing your window can mean lifelong late-enrollment penalties for Part B and Part D unless you qualify for a Special Enrollment Period.
  • Pasadena residents can get free, unbiased one-on-one help from California's SHIP program (called HICAP) before making any decisions.

Here in Pasadena, which sits in Los Angeles County, thousands of residents cross that 65 threshold each year. Whether you plan to keep working, retire, or stay on a spouse's plan, the same federal rules apply — and the clock starts ticking three months before your birthday month.

What the Initial Enrollment Period actually is

The Initial Enrollment Period, or IEP, is the seven-month window Medicare gives you around your 65th birthday to sign up for Part A (hospital coverage) and Part B (doctor and outpatient coverage). It includes:

If your birthday falls on the first of the month, Medicare treats you as eligible the month before, which shifts your window earlier by one month.

Sign up in the first three months, and your coverage generally begins the first day of your birthday month. Wait until your birthday month or later, and your start date can be pushed back — leaving a possible gap in coverage.

Your first steps in Pasadena

Even before your window opens, a few simple steps make the process much smoother:

1. Check your Social Security status. If you're already receiving Social Security benefits, you'll likely be enrolled in Part A and Part B automatically. If not, you'll need to sign up yourself through the Social Security Administration at ssa.gov or by calling 1-800-772-1213. 2. Review any current coverage. If you have insurance through an employer (yours or a spouse's), retiree coverage, COBRA, or a Marketplace plan, find out how it works with Medicare. The rules differ, and getting this wrong is one of the most common — and costly — mistakes. 3. Make a list of your doctors and prescriptions. You'll need this later when comparing Medicare options. 4. Decide how you want to receive coverage. You can stay with Original Medicare (Parts A and B) and optionally add a standalone Part D drug plan and a Medigap policy, or you can choose a Medicare Advantage plan (Part C), which bundles hospital, medical and usually drug coverage together.

Why the Part B decision matters most

Part A is premium-free for most people because they or a spouse paid Medicare taxes while working. Part B, however, has a monthly premium — and this is where the late-enrollment penalty bites.

If you don't sign up for Part B when you're first eligible, and you don't have other qualifying coverage (like an active employer plan from a company with 20 or more employees), you can face a 10% premium penalty for every 12 months you delayed. That penalty typically lasts as long as you have Part B.

There are Special Enrollment Periods for people who kept working past 65 with employer coverage, but the rules are specific. When in doubt, ask before you decline Part B.

Part D and the rules to know for 2027

Prescription drug coverage (Part D) has its own late-enrollment penalty if you go 63 days or more without "creditable" drug coverage after becoming eligible. Even if you take no medications today, many people sign up for a low-cost plan just to protect against the penalty later.

A few figures worth knowing:

What's available in the Pasadena area

Pasadena is in Los Angeles County, where Medicare Advantage and Part D plan choices are set at the county level by the Centers for Medicare & Medicaid Services (CMS). Los Angeles County typically has one of the largest menus of plans in the country, which is good news for choice but can feel overwhelming. Take your time comparing.

You can look up every plan available at your ZIP code using the official Plan Finder at medicare.gov/plan-compare.

After your IEP: the calendar to remember

Once your Initial Enrollment Period ends, you'll live by two main dates each year:

Medigap (Medicare Supplement) has its own separate six-month open enrollment that starts when you're 65 and enrolled in Part B — a window when insurers can't turn you down for health reasons. In California, additional state rules apply, so it's worth asking a counselor about your options.

Where to get unbiased help

You don't have to figure this out alone, and you shouldn't rely on a sales call for your first education.

By the numbers

Medicare Part B premium, 2006–2026

The standard monthly Part B premium has climbed from $88.50 in 2006 to $202.90 in 2026. Hover any point for that year’s premium.

$0$50$100$150$200200820122016202020242026

Source: CMS. Standard premium shown; in some hold-harmless years many existing enrollees paid less. Confirm at Medicare.gov.

By the numbers

How people get Medicare in Los Angeles County

57% are on Medicare Advantage
(MA penetration in Los Angeles County)
57%
43%
Medicare Advantage Medicare Supplement (Medigap) Original Medicare only
U.S. average

MA penetration from CMS enrollment data; Medigap share is an estimate. U.S. average is about 54% Medicare Advantage. These are area-level figures, not plan-specific.

Key dates

Medicare enrollment periods at a glance

  • Around your 65thInitial Enrollment PeriodA 7-month window around the month you turn 65 — your first chance to sign up.
  • October 15 – December 7Annual Enrollment PeriodAnyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan.
  • January 1 – March 31Medicare Advantage Open EnrollmentIf you're already in a Medicare Advantage plan, you can make one change.
  • January 1 – March 31General Enrollment PeriodFor people who missed their first chance to sign up for Part B.
  • VariesSpecial Enrollment PeriodTriggered by life events like moving or losing other coverage.

Dates are set by Medicare and apply nationwide. Confirm your personal windows at Medicare.gov or 1-800-MEDICARE.

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See Medicare options serving Pasadena & speak with a licensed agent

Medicare Advantage companies in Los Angeles County

By local enrollment size · informational, not a ranking
CompanyLocal enrollmentPlans offeredLocal agentsAction
Kaiser PermanenteRegional—Yes
Scan GroupRegional—Yes
Elevance Health (Anthem)National—Yes
UnitedHealthcareNational—Yes
Alignment Healthcare Usa LLCRegional—Yes
HumanaNational—Yes
Enrollment data: CMS Medicare Advantage enrollment by company (county level). Figures shown are illustrative sample data pending the current CMS file. Listed by enrollment size, largest first — this is not a ranking, recommendation, or endorsement of any company or plan.

Provided by licensed insurance partners; MyMedicarePlans.org may be compensated. Not a ranking or endorsement of any plan.

Explore

When can you enroll? An interactive year

JFMAMJJASOND
October 15 – December 7 — anyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan. Changes take effect January 1.

Enrollment windows are federal and the same nationwide. Confirm your personal dates at Medicare.gov or 1-800-MEDICARE.

Explore

The parts of Medicare

Part A covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health care. Most people pay no premium for Part A.

Good to know

Frequently asked questions

When exactly does my Initial Enrollment Period start?
It starts three months before the month you turn 65 and ends three months after your birthday month, for a total of seven months. For example, if your birthday is in July, your window runs from April 1 through October 31.
Do I have to take Part B if I have employer coverage?
Not always. If you or your spouse are still working and covered by an employer plan from a company with 20 or more employees, you may be able to delay Part B without a penalty and enroll later through a Special Enrollment Period. Check with your benefits administrator before turning anything down — retiree coverage and COBRA are treated differently.
What happens if I miss my Initial Enrollment Period?
You may have to wait for the General Enrollment Period (January 1 – March 31) to sign up for Part B, with coverage starting the month after you enroll. You could also owe a lifelong late-enrollment penalty. Some people qualify for a Special Enrollment Period based on their situation.
Is Medicare Advantage or Original Medicare better for someone new to Medicare?
Neither is universally "better" — it depends on your doctors, medications, budget and travel habits. Original Medicare (often paired with a Medigap plan and a Part D plan) offers broad provider access nationwide, while Medicare Advantage often bundles extras but uses networks. A HICAP counselor can walk you through the trade-offs for free. The most important thing to remember: your seven-month window won't reopen. Mark your calendar, ask questions early, and lean on the official resources built for exactly this moment.
Sources & further reading
  • CMS — Medicare enrollment periods (medicare.gov)

For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.

Also for Pasadena

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This page was last updated: September 29, 2026.

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