You should not have to become an insurance expert just to make a healthcare decision. Yet Medicare conversations can start sounding like alphabet soup: Part A, Part B, Part C, Part D, HMO, PPO. By the time someone mentions a deductible, it is reasonable to want a coffee break.

Let us slow it down. This Medicare Advantage 101 guide explains the main ideas, the questions worth asking, and where your primary care provider fits. If you are comparing coverage in Santa Ana or elsewhere in Orange County, the goal is to understand how a plan would work in your actual life. 🧡

What is Medicare Advantage?

Medicare Advantage, also called Part C, is a way to receive your Medicare benefits through a Medicare-approved private insurer. You remain in Medicare. According to Medicare.gov’s overview of health plans, these plans provide Part A and Part B benefits, and most include prescription drug coverage, or Part D.

Part A generally concerns hospital coverage; Part B concerns medical services such as outpatient care. Part D is prescription drug coverage. Part C is not a separate type of doctor—it is the Medicare Advantage way of organizing coverage. Understanding that distinction makes the rest of the conversation easier.

You generally need both Part A and Part B and must live in the plan’s service area to join Medicare Advantage. Other eligibility and enrollment requirements apply. Check the official joining-a-plan guidance rather than assuming a plan advertised nearby is available at your address.

How is it different from Original Medicare?

With Original Medicare, you can generally use providers nationwide who accept Medicare. Medicare Advantage commonly uses provider networks and may require referrals or prior authorization for some care. Some plans include additional benefits, but their scope and limits vary. Medicare’s side-by-side comparison is a useful starting point.

Neither option is automatically the right answer for everyone. Think about how often you travel, which clinicians you need, the medications you take, and the costs you could manage in a year with more medical care. A plan that works well for your neighbor can still be a poor fit for you.

For a comparison conversation, bring a real example: “I see these two specialists, fill these medications, and spend part of the year with family.” Specific details are more useful than asking which plan is best in general.

HMO and PPO: what changes for you?

In a Medicare Advantage HMO, you usually choose a PCP and generally use the plan’s network. Specialist referrals are commonly required. Exceptions include emergency care, out-of-area urgent care, and temporary out-of-area dialysis. Some HMO-POS plans allow certain out-of-network services at higher cost.

In a Medicare Advantage PPO, you generally do not need to select a PCP or obtain specialist referrals. Covered out-of-network services may be available, usually at higher cost. That does not mean any office must accept the plan or that every service is covered. Confirm the provider and service before you go.

Whichever structure you choose, a regular primary care relationship can help you keep your health concerns organized. Ask how you would reach your clinician, schedule a follow-up, and get questions answered. The network tells you where care may be covered; it does not tell you how a particular practice feels.

A $0 plan premium does not mean all your care is free

A premium is the amount paid for coverage, while a copay or coinsurance is your share of a covered service. Deductibles and service-specific costs may also apply. You generally continue paying your Part B premium in Medicare Advantage, although assistance or some plan benefits may help. Review Medicare’s cost guidance and the actual plan documents.

Ask for costs using situations you understand: a primary care appointment, a specialist visit, outpatient imaging, a hospital stay, and your prescriptions. Look beyond the monthly headline. A comparison should show what you might pay when you use care, not only what you pay to keep the plan.

Medicare Advantage has an annual out-of-pocket limit for covered Part A and Part B services, with plan-specific rules and potentially separate in-network and combined limits. Premiums and Part D drug spending are not part of that medical-services limit. Prescription coverage has its own cost structure. Ask the plan to identify the applicable limits rather than combining everything into one number.

Your prescriptions deserve their own check

Write down each medication’s exact name, strength, and how often you fill it. Include the pharmacy you actually use. During a comparison, ask whether each drug is covered, what you would pay, and whether approval requirements or other restrictions apply. An answer about “prescription coverage” in general does not answer the question about your specific medicine.

If an option does not appear to cover something you take, ask the plan or a qualified counselor to explain what that means. Discuss any proposed medication change with your prescribing clinician. Choosing coverage should not turn into changing treatment on your own.

Keep the medication list somewhere you can update it. You can also bring it to your first visit with a new primary care team so the insurance conversation and the clinical conversation start from the same information.

A referral and prior authorization are not the same thing

A referral is a clinician’s direction to another provider, often a specialist. Prior authorization is a coverage approval process used by an insurance plan for certain services or items. Depending on the plan and service, one, both, or neither may be needed. Ask who handles each step and how you will know it is complete.

Before booking specialist care, ask your plan about its requirements. If you are establishing care with besa Health, our primary care page explains our clinical approach, and our get-care page is a place to start your questions about arranging a visit.

Medicare Advantage is not Medigap

Medigap, also called Medicare Supplement Insurance, helps pay certain out-of-pocket costs in Original Medicare. It does not supplement Medicare Advantage. Its enrollment protections are different from the fall Medicare enrollment period. Medicare’s Medigap basics explain that buying a policy later may be restricted or more expensive outside protected enrollment situations.

If you are thinking about leaving Medicare Advantage for Original Medicare, ask about drug coverage and your ability to obtain Medigap before making the switch. Do not assume that a fall plan change guarantees access to any supplement you want.

When can you make a change?

The fall Medicare Open Enrollment period runs October 15–December 7. For the current 2026 window, changes generally start January 1, 2027. There is also a January 1–March 31 Medicare Advantage Open Enrollment period for people already enrolled in Medicare Advantage, with limited change options. Initial and special enrollment periods follow different eligibility rules.

If you are unsure which window applies, use Medicare’s enrollment information or ask a counselor. Before changing employer or union coverage, speak with your benefits administrator; the effects may extend beyond your own coverage.

Where does besa Health fit?

besa Health is a healthcare practice, not an insurance plan. If you want to see us, check your exact plan, participating clinician, location, and any PCP assignment requirements. Start with our insurance information; a carrier name alone does not establish network participation.

You can explore the besa Health app and our approach to mental health care as you think about the services important to you. Coverage and access depend on the particular service and your plan.

For independent help comparing Medicare options, California HICAP provides free, unbiased counseling. For questions about establishing care at besa, call (949) 775-1790. Once coverage and any required assignment are confirmed, book your visit.

Information checked October 16, 2026. This is general education, not a recommendation of a particular insurance plan. Confirm eligibility, coverage, costs, and provider participation with the plan.