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Navigating Medicare: Understanding Your Coverage Options
Dr. Michael Zimmer

Dr. Michael A. Zimmer

Navigating Medicare: Understanding Your Coverage Options

Medically reviewed by Michael A. Zimmer, MD, MACPBoard-Certified Internal Medicine, Medical Director
Post Summary

Medicare can be confusing with its multiple parts and plan options. This plain-language guide explains Parts A, B, C, and D, helps you understand supplemental plans, and provides tips for making the most of your coverage.

Making Sense of Medicare

Turning 65 or becoming eligible for Medicare is a milestone that comes with an overwhelming amount of paperwork, acronyms, and decisions. With multiple parts, plan options, enrollment periods, and coverage gaps, it is no wonder that many new Medicare beneficiaries feel confused about their choices.

At Zimmer Medical Group, we accept Medicare and work with patients navigating this transition every day. While we cannot provide insurance advice, we can help you understand the basics so you can make informed decisions about your healthcare coverage.

The Four Parts of Medicare

Part A: Hospital Insurance

Medicare Part A covers inpatient hospital care, skilled nursing facility care, hospice care, and some home health services. Most people do not pay a monthly premium for Part A if they or their spouse paid Medicare taxes for at least 10 years while working.

Part A covers:

  • Hospital stays (semi-private room, meals, nursing services, medications during your stay)
  • Skilled nursing facility care (up to 100 days per benefit period after a qualifying hospital stay)
  • Home health services (intermittent skilled nursing, physical therapy, occupational therapy)
  • Hospice care for terminal illness

Part A has a deductible ($1,632 in 2024) that applies per benefit period, not per calendar year. A benefit period begins when you are admitted to the hospital and ends when you have been out of the hospital or skilled nursing facility for 60 consecutive days.

Part B: Medical Insurance

Medicare Part B covers outpatient medical services, including doctor visits, preventive services, laboratory tests, imaging, durable medical equipment, and ambulance services. Part B requires a monthly premium ($174.70 per month in 2024 for most people, with higher premiums for higher earners).

Part B covers:

  • Doctor visits and specialist consultations
  • Preventive services including annual wellness visits, screenings, and vaccinations
  • Laboratory tests and diagnostic imaging
  • Outpatient surgery
  • Mental health services
  • Durable medical equipment (wheelchairs, walkers, hospital beds)

After meeting your annual Part B deductible ($240 in 2024), Medicare typically pays 80 percent of approved charges, and you are responsible for the remaining 20 percent coinsurance. This 20 percent can add up quickly, especially for hospitalizations or expensive treatments, which is why many beneficiaries purchase supplemental coverage.

Part C: Medicare Advantage

Medicare Advantage plans are offered by private insurance companies approved by Medicare. They provide all Part A and Part B coverage, often with additional benefits such as dental, vision, hearing, fitness programs, and prescription drug coverage.

Key features of Medicare Advantage:

  • Monthly premiums vary by plan (some have $0 premiums beyond your Part B premium)
  • Plans typically have lower out-of-pocket costs for routine care
  • Most require you to use a network of providers
  • Many include prescription drug coverage (Part D)
  • Out-of-pocket maximums protect you from catastrophic costs

The trade-off is that Medicare Advantage plans often require referrals for specialists and may have limited provider networks. If your preferred doctors and hospitals are in the plan's network, Medicare Advantage can be an excellent and cost-effective choice.

Part D: Prescription Drug Coverage

Medicare Part D provides prescription drug coverage through private insurance plans. Part D plans have their own monthly premiums, deductibles, and formularies (lists of covered medications).

Part D plans use a coverage structure with phases:

  1. Deductible phase: You pay full cost until meeting the deductible
  2. Initial coverage phase: You pay copays or coinsurance for each prescription
  3. Coverage gap (donut hole): You pay a higher percentage for drugs until reaching the catastrophic threshold (this gap has been significantly reduced by recent legislation)
  4. Catastrophic coverage: Your costs drop to a small copayment or coinsurance

Choosing the right Part D plan requires reviewing which medications you take, comparing formularies, and calculating your estimated annual out-of-pocket costs across different plans.

Medicare Supplement Plans (Medigap)

If you choose Original Medicare (Parts A and B), you may want a Medigap policy to cover the costs that Medicare does not pay, including deductibles, copayments, and the 20 percent Part B coinsurance. Medigap plans are standardized and labeled with letters (Plan F, Plan G, Plan N, etc.), with each letter offering a specific set of benefits.

According to Medicare.gov, the most popular Medigap plans are Plan G (which covers nearly all out-of-pocket costs except the Part B deductible) and Plan N (which has lower premiums but includes small copayments for some services).

Important: You cannot have both a Medigap policy and a Medicare Advantage plan. You must choose one approach or the other.

Key Enrollment Periods

Initial Enrollment Period (IEP)

A seven-month window surrounding your 65th birthday (three months before, your birthday month, and three months after). This is the best time to enroll, as you have guaranteed-issue rights for Medigap policies during this period.

Annual Enrollment Period (AEP)

October 15 through December 7 each year. During this period, you can switch Medicare Advantage plans, switch between Original Medicare and Medicare Advantage, or change your Part D plan. Changes take effect January 1.

Special Enrollment Periods

Available if you experience qualifying life events such as moving, losing other health coverage, or qualifying for both Medicare and Medicaid.

Tips for Making the Most of Your Medicare

  1. Use your free preventive services. Medicare covers an annual wellness visit, many cancer screenings, cardiovascular screenings, diabetes screenings, and vaccinations at no cost. Take advantage of them.
  2. Review your plan annually. Drug formularies, premiums, and provider networks change each year. Use the Annual Enrollment Period to compare options.
  3. Understand your costs before procedures. Ask your doctor's office to verify that a service is covered before you receive it.
  4. Keep records. Maintain copies of Medicare statements, Explanation of Benefits (EOB) documents, and correspondence.
  5. Seek help if needed. Your State Health Insurance Assistance Program (SHIP) offers free, unbiased Medicare counseling.

Have questions about how Medicare works with your care at our practice? Contact Zimmer Medical Group to speak with our team. We are here to help you navigate your coverage and get the most out of your benefits.