If you receive Social Security benefits before turning 65, Medicare generally enrolls you automatically in Part A and Part B when you become eligible. You’ll receive a Medicare card and enrollment information, but you still make important decisions—such as Medicare Advantage, Medigap, and prescription drug coverage.
What Happens When You Turn 65 and Already Receive Social Security?
Turning 65 can feel like a major transition, especially when you are already receiving Social Security. Fortunately, some Medicare enrollment steps may happen automatically.
If you are receiving Social Security benefits at least four months before your 65th birthday, Medicare generally automatically enrolls you in Part A (Hospital Insurance) and Part B (Medical Insurance). Medicare says it will send a welcome package and Medicare card approximately three months before your coverage begins.
However, automatic enrollment does not mean every aspect of your Medicare coverage is automatically selected for you.
You may still need to evaluate:
- Medicare Advantage plans
- Original Medicare with a Medicare Supplement (Medigap) policy
- Prescription drug coverage through Part D
- Your doctors and hospital networks
- Premiums, deductibles, copayments, and coinsurance
- Whether your current coverage should be changed or discontinued
This distinction is important because Medicare gives you a foundation of coverage, but you still have decisions to make about how you want that coverage to work.
What Is Automatically Included?
For someone already receiving Social Security and automatically enrolled in Medicare, the two primary components are Part A and Part B.
| Medicare Component | What It Generally Covers | Automatically Included? |
| Part A | Inpatient hospital care, skilled nursing facility care, hospice, and some home health care | Generally yes |
| Part B | Doctor visits, outpatient care, medical services, and certain preventive services | Generally yes |
| Part C | Medicare Advantage plans offered by private insurers | No |
| Part D | Prescription drug coverage | No |
| Medigap | Helps pay certain costs not covered by Original Medicare | No |
Medicare Advantage is an alternative way to receive Medicare benefits, while Medigap works alongside Original Medicare. They are not interchangeable choices.
Does Social Security Automatically Enroll You in Part B?
Usually, yes, if you are already receiving Social Security benefits and meet the automatic-enrollment requirements.
That can be helpful because missing your initial Medicare enrollment window can potentially result in coverage delays or late enrollment penalties. However, people who are still working and covered by an employer group plan may have different options.
For example, if you or your spouse are still working and you have coverage through that current employment, you may qualify to delay Part B and later use a Special Enrollment Period. COBRA and retiree coverage generally do not receive the same treatment as coverage based on current employment.
Important: Do not assume that employer coverage automatically means you should decline Part B. Verify how your employer plan coordinates with Medicare before making a decision.
What Does Medicare NOT Automatically Choose for You?
Automatic enrollment is where many people become surprised.
Medicare generally does not automatically choose a Medicare Advantage plan, Medigap policy, or Part D prescription drug plan for you.
If you stay with Original Medicare, you may consider adding prescription drug coverage and, depending on your circumstances, a Medigap policy.
Medigap can help pay certain out-of-pocket costs associated with Original Medicare. Your initial Medigap Open Enrollment Period begins when you are 65 or older and have Part B. During this six-month period, you generally have important protections that can make obtaining Medigap coverage easier, even if you have health conditions.
This is one reason turning 65 is more than simply receiving a Medicare card.
Medicare Advantage vs. Original Medicare + Medigap
One of the biggest decisions is determining how you want to receive your Medicare coverage.
Option 1: Original Medicare + Medigap + Part D
This approach combines:
- Medicare Part A
- Medicare Part B
- A Medigap policy
- A separate Part D prescription drug plan
Medigap policies help pay certain Medicare cost-sharing amounts, while Part D provides prescription drug coverage. Medigap policies sold today generally do not include prescription drug coverage, so drug coverage usually requires a separate Part D plan.
Option 2: Medicare Advantage
Medicare Advantage, also called Part C, provides Medicare benefits through a private Medicare-approved plan.
Depending on the plan, coverage may include:
- Hospital services
- Doctor and specialist services
- Prescription drugs
- Additional benefits
Network rules, premiums, copayments, prior authorization requirements, and out-of-pocket limits can vary considerably between plans.
For someone who wants to keep a particular physician or specialist, checking the plan’s provider network should be one of the first steps—not an afterthought.
What About Prescription Drugs?
Prescription coverage deserves special attention when turning 65.
Original Medicare does not automatically include Part D prescription drug coverage. If you choose Original Medicare and need prescription coverage, you generally need to evaluate a separate Part D plan.
If you choose Medicare Advantage, prescription coverage may be included in the plan, depending on the plan.
Before choosing coverage, make a list of:
- Every prescription you currently take.
- The dosage and frequency.
- Your preferred pharmacy.
- Any specialty medications.
- Your estimated annual medication costs.
Then compare the plan’s formulary, pharmacy network, premiums, deductibles, and cost-sharing.
This can reveal a key insight: the plan with the lowest monthly premium is not necessarily the plan with the lowest total annual healthcare cost.
Your Medicare Card Is Not the End of the Process
Receiving a Medicare card can create the impression that everything is finished. It isn’t.
Think of automatic Medicare enrollment as Step One, not the final decision.
A useful checklist for Arizona residents approaching 65 is:
Before Your 65th Birthday
- Confirm your Medicare effective date.
- Review your Social Security and Medicare correspondence.
- Determine whether you will continue working.
- Review current employer coverage, if applicable.
- Make a list of doctors and specialists.
- List all prescription medications.
- Estimate your expected healthcare usage.
- Compare Original Medicare and Medicare Advantage.
- Research Medigap and Part D if considering Original Medicare.
After Enrollment
Confirm that:
- Your Medicare information is correct.
- Your preferred doctors accept your chosen coverage.
- Your prescriptions are covered.
- Your pharmacies participate.
- You understand premiums and cost-sharing.
- You know how claims, referrals, and prior authorizations work.
What If You Are Not Receiving Social Security Yet?
Turning 65 does not automatically mean everyone is enrolled in Medicare.
If you are not receiving Social Security benefits, you may need to actively enroll in Medicare. The Social Security Administration states that people generally sign up for Medicare through Social Security, and enrollment timing is important.
Your Initial Enrollment Period generally surrounds your 65th birthday and includes the three months before your birthday month, your birthday month, and the three months afterward.
Coverage start dates can vary depending on when you enroll.
That makes it especially important not to wait until your birthday month to start researching your options.
How Much Does Medicare Cost?
Medicare costs depend on your specific circumstances and the coverage you choose.
For 2026, the standard Medicare Part B premium is $202.90 per month. Higher-income beneficiaries may pay an additional income-related amount for Part B and Medicare prescription drug coverage.
Your total health insurance budget may also include:
- Part B premiums
- Part D premiums
- Medicare Advantage premiums, if applicable
- Medigap premiums, if applicable
- Deductibles
- Copayments
- Coinsurance
- Prescription costs
- Out-of-network expenses
Instead of comparing plans solely by monthly premium, consider your potential total annual cost based on your doctors, prescriptions, expected medical services, and preferred level of flexibility.
A Smart Approach to Medicare Health Insurance at 65
The best Medicare health insurance choice depends on your individual healthcare needs, financial priorities, doctors, medications, and preferences.
For example, someone who travels frequently may prioritize different features than someone who primarily receives care from a small group of local physicians. Someone taking several prescriptions may focus heavily on formularies and pharmacy costs.
Before enrolling, ask:
- Can I keep my current doctors?
- Are my prescriptions covered?
- What will I pay monthly?
- What could I pay out of pocket?
- Does the plan require referrals?
- Are specialists and hospitals in-network?
- What prior authorization rules apply?
- What happens if I travel outside Arizona?
These questions can help turn a complicated Medicare decision into a manageable comparison.
Get Help Comparing Your Options
Turning 65 does not have to mean navigating Medicare alone.
Smile Insurance Group helps Medicare-eligible individuals understand their coverage options, compare plans, and make informed decisions without unnecessary pressure. A knowledgeable insurance professional can help you evaluate Medicare Advantage, Medicare Supplement, and prescription drug coverage based on your individual circumstances.
If you’re approaching 65 in Arizona, schedule a Medicare consultation with Smile Insurance Group to review your options and understand what happens next.
The goal isn’t simply to enroll. It is to choose coverage that fits your healthcare needs, budget, and priorities—and to have knowledgeable support when questions arise later.
Final Takeaway
If you’re turning 65 in Arizona while receiving Social Security, Medicare may handle the initial enrollment in Part A and Part B automatically. But your most important coverage decisions—Medicare Advantage versus Original Medicare, Medigap, prescription coverage, providers, and potential out-of-pocket costs—still require careful review.
Starting early gives you more time to compare your options, ask questions, and avoid costly surprises.
Ready to understand your Medicare options? Contact Smile Insurance Group for a personalized, no-pressure Medicare consultation.
FAQ: Turning 65 With Social Security and Medicare
Does Medicare automatically start when I turn 65 and receive Social Security?
Yes. If you are receiving Social Security benefits at least four months before turning 65, Medicare generally automatically enrolls you in Part A and Part B.
Does Medicare automatically enroll me in Medicare Advantage?
No. Medicare Advantage is an optional alternative to Original Medicare that you generally need to select yourself.
Does automatic Medicare enrollment include prescription drug coverage?
No. Prescription drug coverage is not automatically selected simply because you are enrolled in Part A and Part B; you need to evaluate Part D or a Medicare Advantage plan that includes drug coverage.
When should I consider a Medigap policy?
If you choose Original Medicare, your six-month Medigap Open Enrollment Period begins when you are 65 or older and enrolled in Part B.
Can I keep my current doctor after turning 65?
Possibly, but it depends on the coverage you choose. Always verify whether your doctors, specialists, hospitals, and other providers participate in your selected plan before enrolling.
