You don't need an insurance agent to find and enroll in a great Medicare Advantage plan. The official Medicare.gov Plan Finder gives you everything you need — for free, with no sales pressure.
Having this information ready will make the process much smoother and ensure you get accurate cost estimates.
Choose the coverage type below that applies to your situation. Each section gives you the straight steps to enroll on your own. If your situation is more complex — multiple conditions, late enrollment, employer coverage, or other special circumstances — use the AI Assistants page to ask more specific, personalized questions.
Most people are enrolled in Part A (hospital insurance) and Part B (medical insurance) automatically at age 65 if they are already receiving Social Security benefits. If not, you must sign up yourself.
Missing your IEP without qualifying coverage from an employer can result in a permanent late enrollment penalty on your Part B premium.
Have a more complex situation? Use the AI Assistants & Writing Prompts page to craft a personalized prompt for your specific circumstances.
Medicare Advantage plans are offered by private insurers approved by Medicare. They bundle Parts A and B — and usually Part D — into one plan. You enroll through Medicare.gov, not through Social Security.
Always verify your doctors are in-network directly with their office before enrolling — plan directories can be outdated.
Have a more complex situation? Use the AI Assistants & Writing Prompts page to craft a personalized prompt for your specific circumstances.
Part D covers prescription drugs. If you choose Original Medicare (not Medicare Advantage), you need to enroll in a standalone Part D plan separately. If you choose Medicare Advantage, drug coverage is usually included.
Enrolling in Part D late — without other creditable drug coverage — results in a permanent monthly penalty added to your premium.
Have a more complex situation? Use the AI Assistants & Writing Prompts page to craft a personalized prompt for your specific circumstances.
Medicare Supplement plans (also called Medigap) help pay costs that Original Medicare does not cover — such as copays, coinsurance, and deductibles. They are sold by private insurance companies, not through Medicare.gov.
Waiting until after your Medigap Open Enrollment Period ends may mean insurers can charge you more or deny coverage based on your health history.
Have a more complex situation? Use the AI Assistants & Writing Prompts page to craft a personalized prompt for your specific circumstances.
You must be within a valid enrollment period to sign up for or change a Medicare Advantage plan.
7-month window around your 65th birthday
Starts 3 months before the month you turn 65, includes your birthday month, and ends 3 months after. This is your first opportunity to enroll.
October 15 – December 7 each year
The main window when anyone with Medicare can switch, join, or drop a Medicare Advantage plan. Coverage begins January 1 of the following year.
January 1 – March 31 each year
If you're already enrolled in a Medicare Advantage plan, you can switch to a different MA plan or return to Original Medicare during this period.
Triggered by qualifying life events
You may qualify for a SEP if you move, lose other coverage, qualify for Medicaid, or experience other qualifying life changes. SEPs are typically 2 months long.
Call 1-800-MEDICARE (1-800-633-4227) — available 24/7. TTY users call 1-877-486-2048.
1-800-633-4227If you'd rather have a professional guide you, read our page on how to work with an agent — and what to watch out for.
Working with an AgentDisclaimer: Medicare Made Clear, Made Simple with AI is an independent educational website not affiliated with the U.S. government or Medicare program. Always verify plan details and enrollment eligibility at Medicare.gov before enrolling.