Life and Health Insurance · Accident and Health Insurance · 7 min read
Medicare Advantage and Drug Benefits
- Explain the structure, eligibility requirements, and plan types of Medicare Part C (Medicare Advantage).
- Describe Medicare Part D prescription drug coverage, including formularies, cost-sharing structures, and late enrollment rules.
- Identify the election periods, coordination of benefits rules, and consumer protections that govern Medicare Advantage and Part D plans.
Medicare Part C: Medicare Advantage Fundamentals
Medicare Part C, also known as Medicare Advantage, provides an alternative way for beneficiaries to receive their Medicare benefits. These plans are offered by private insurance companies approved by Medicare. Medicare pays these private insurers a monthly amount per enrollee to deliver care. This monthly payment varies based on several factors, including the plan's bid and the individual enrollee's health risk.
To enroll in Medicare Part C, an individual must be enrolled in both Medicare Part A and Medicare Part B. Joining a Medicare Advantage plan does not eliminate the Medicare Part B premium. Enrollees must keep Part B and generally remain responsible for its premium, although Medicaid, another assistance program, or a Medicare Advantage plan benefit may pay or reduce it. In 2026, the standard Medicare Part B monthly premium is $202.90, though higher-income beneficiaries pay higher Part B premiums through income-related monthly adjustment amounts.
Medicare Advantage plans must cover the medically necessary Part A and Part B services covered by Original Medicare, with exceptions such as hospice care, which Original Medicare continues to cover. However, Original Medicare continues to pay directly for hospice care and certain other specific expenses, such as some clinical trial costs. Hospice care remains covered under Original Medicare Part A even after a person enrolls in Medicare Advantage. In addition to standard Medicare benefits, many Medicare Advantage plans provide extra benefits not covered by Original Medicare, including routine dental, vision, and hearing services. Most Medicare Advantage plans also bundle prescription drug coverage and are designated as Medicare Advantage Prescription Drug plans.
A critical consumer protection in Medicare Part C is the mandatory annual maximum out-of-pocket limit on covered Part A and Part B medical expenses. In contrast, Original Medicare Parts A and B have no annual out-of-pocket maximum. If a client already owns a Medicare Supplement (Medigap) policy, they may keep it after joining a Medicare Advantage plan, but Medigap does not pay Medicare Advantage copayments or deductibles. Furthermore, an insurer generally cannot sell a Medigap policy to a Medicare Advantage member unless that individual is actively switching back to Original Medicare.
Common mistakes
- Believing that enrolling in a Medicare Advantage plan eliminates the requirement to pay the Medicare Part B monthly premium.
- Assuming that a client enrolled in a Medicare Advantage HMO or PPO that includes prescription drug coverage can also buy a standalone Part D Prescription Drug Plan.
- Thinking that Medigap policies pay the deductibles and copayments incurred under a Medicare Advantage plan.
- Assuming that the historic Part D coverage gap (donut hole) still exists as an active phase in the current standard Part D benefit design.
Key points
- Medicare Part C (Medicare Advantage) plans are offered by Medicare-approved private insurers and require enrollees to have Parts A and B and keep the Part B premium paid, although assistance or a plan benefit may pay or reduce that premium.
- Medicare Advantage plans generally cover Medicare-covered Part A and Part B services, but Original Medicare pays for hospice care and certain other services, including some clinical trial costs.
- Unlike Original Medicare, Medicare Advantage plans have a mandatory annual out-of-pocket maximum for covered Part A and Part B services furnished through the plan; the limit does not apply to every medical or drug expense.
- Medicare Part D provides outpatient drug coverage through standalone PDPs or Medicare Advantage plans, organizing covered drugs on formularies by cost-sharing tiers.
- Federal reforms eliminated the historic coverage gap (donut hole) and established a hard annual cap on out-of-pocket prescription drug costs, after which members pay zero for covered drugs.
- A gap of 63 or more consecutive days without Part D or other creditable drug coverage after the initial enrollment period may result in a late enrollment penalty when an eligible individual later joins Part D, unless an exception applies.
- Key enrollment opportunities include the Annual Election Period (October 15 to December 7), the Medicare Advantage Open Enrollment Period (January 1 to March 31), and Special Enrollment Periods triggered by qualifying events.
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