When am I eligible for Medicare benefits and when should I enroll?
If you're turning 65, you probably know this is the birthday that makes you eligible for Medicare. (If you are disabled, you may be eligible earlier than age 65.) Beyond that, it gets more complicated. Do you have to enroll at 65? What happens if you don't? Which parts and plans should you enroll in when? And why?
There are only a few things you need to know, but they're important.
Do I have to enroll in Medicare at age 65?
You are not legally required to enroll in Medicare at age 65 — even if you're working and you have health insurance through your current employer or are self-employed with individual and family coverage. But if you’re turning 65 and retired or will retire soon, you'll likely pay the lowest premiums if you enroll in Medicare during the initial enrollment period.
The initial enrollment period starts 3 months before the month of your 65th birthday and continues through 3 months after. For example, if you were born in June, this period extends from March through September. If you were born in October, it's from July through January. You may pay a higher premium if you enroll after this 7-month period.
You may pay premiums for Medicare Part B (covering outpatient care) and Part D (covering prescription drugs), Medicare Advantage (Part C, which is Parts A and B plus additional coverage), and Medigap plans. Once you're eligible, you may pay higher premiums if you delay enrollment in these Parts B and D.
Medicare Part A covers only inpatient care, such as in a hospital or long-term care facility. Most people don't pay a premium for Part A, so there's no penalty for enrolling later.
What if I'm still working and I'm covered through my employer's health insurance?
In most cases, you don't have to enroll in Medicare if you're still working and covered by your employer's plan. That is, you won't pay a penalty in the form of higher premiums if you wait until you stop working to enroll in Medicare.
However, because most people pay no premiums for Part A, it costs you nothing to enroll right away, even though you may not need the coverage right away.
If your company has 20 or more employees, your employer coverage is primary — that is, it pays claims first. If your company has fewer than 20 employees, Medicare pays first.
When you do stop working, you have 8 months to enroll in Medicare Part B and 63 days to enroll in Medicare Part D after your employment ends. Any later than that and your premiums may be higher when you do enroll.
Note: If you defer your enrollment in Part D, you will need to provide proof that your employer's prescription drug coverage is "creditable." To do this, you submit a Creditable Coverage Certificate, which your employer group is required to provide.
After I retire, when is my next chance to enroll in Medicare outside of the initial enrollment period?
Remember: when you stop working, you have 8 months to enroll in Medicare Part B and 63 days to enroll in Medicare Part D after your employment ends to avoid penalties. Any later than that and your premiums may be higher when you do enroll. To enroll in Part C (Medicare Advantage), unless you qualify for a special enrollment period, you must submit your enrollment request within 60 days of your loss of active employer or union coverage or loss of creditable drug coverage.
If you're already retired, your next chance to enroll in Original Medicare is during the Open Enrollment Period (OEP), January 1 through March 31. Your Medicare coverage will begin July 1. To enroll in Medicare Advantage, you can submit your enrollment request between April 1 and June 30, for a July 1 effective date. After this, unless you qualify for a special enrollment period, the next chance to enroll in a Medicare Advantage health plan is during the Annual Enrollment Period (AEP), October 15 through December 7. (If you missed your initial enrollment period, your premiums may be higher.)
During the annual enrollment period, you can:
- Enroll in a Medicare plan for the first time.
- Switch between Original Medicare and Medicare Advantage plans.
- Switch from one Medicare Advantage plan to another.
- Enroll in a stand-alone Medicare Part D prescription drug plan, or switch from one stand-alone Part D plan to another.
- Drop your stand-alone Medicare Part D plan, possibly because you’ve enrolled in a Medicare Advantage plan that includes drug coverage.
Learn about Medicare plans for group, state, and federal employees
If you are becoming eligible for Medicare and your employer offers a group retiree Medicare Advantage health plan through Kaiser Permanente Washington, call us at 1-800-581-8252 or TTY 711, from 8 a.m. to 5 p.m., Monday through Friday.
FEHB and PEBB members can also find information online:
- FEHB (Federal Employees Health Benefits) Program health plans
- PEBB (Public Employees Benefits Board) Program health plans
Medicare Star Quality Ratings
Our Medicare Advantage health plan was rated 4.5 out of 5 Stars in Washington for 2021. The Medicare Star Rating is based on quality, service, and member satisfaction. Our high rating means you can have peace of mind knowing that you're getting high-quality care and coverage — all in a single plan at a great value.1
NCQA Quality Rating
Kaiser Permanente Washington Medicare Advantage (HMO) plan was rated 4.5 out of 5 in the National Committee for Quality Assurance (NCQA) Medicare Health Insurance Plan Ratings 2019-2020.2