Understanding Medicare Parts
Medicare is divided into four distinct parts, each covering a specific set of health services. Knowing which part applies to a given service helps seniors avoid unexpected bills and make informed decisions about supplemental coverage.
Part A – Hospital Insurance
Part A pays for inpatient hospital stays, skilled nursing facility care, hospice, and some home health services. Most beneficiaries do not pay a premium if they or a spouse paid Medicare taxes for at least 40 quarters. A deductible applies per benefit period, and coinsurance kicks in after 60 days of hospitalization.
Part B – Medical Insurance
Part B covers outpatient doctor visits, preventive services, durable medical equipment, and many laboratory tests. A monthly premium is required, and the standard 2024 premium is $174.70, though higher‑income enrollees pay more. After meeting the annual deductible, Medicare typically pays 80 % of the approved amount.
Part C – Medicare Advantage
Medicare Advantage plans are offered by private insurers approved by Medicare. They bundle Part A, Part B, and usually Part D into a single plan, often adding extra benefits such as vision, dental, and wellness programs. Network restrictions and cost‑sharing rules vary by plan, so reviewing the plan’s Summary of Benefits is essential.
Part D – Prescription Drug Coverage
Part D provides outpatient prescription drug coverage through private plans. Each plan has a formulary, tiered cost‑sharing, and a coverage gap (the “donut hole”) that has been largely closed by recent legislation. Seniors should compare plan formularies annually during the Open Enrollment Period to ensure their medications remain covered at the lowest cost.
Covered Preventive Services
Medicare emphasizes prevention by covering a wide range of screenings and counseling services at no cost to the beneficiary when provided by a participating provider. These services can detect conditions early, reducing the need for more expensive treatment later.
- Annual wellness visit and personalized prevention plan
- Cardiovascular disease screening (blood pressure, cholesterol)
- Diabetes screening and self‑management training
- Colorectal cancer screening (colonoscopy, fecal occult blood test)
- Mammography for breast cancer every 12 months
- Bone density measurement for osteoporosis risk
- Vaccinations: flu, pneumococcal, hepatitis B, COVID‑19
- Depression and alcohol misuse screening
Hospital and Outpatient Care
When a senior requires hospitalization or outpatient procedures, Medicare’s coverage rules determine what is paid and what the patient owes. Understanding these rules can prevent surprise charges.
- Inpatient admission under Part A includes semi‑private room, meals, nursing, and drugs administered during the stay.
- Observation status (outpatient) is covered under Part B; the patient pays the Part B deductible and 20 % coinsurance.
- Skilled nursing facility care follows a qualifying three‑day inpatient stay; up to 100 days per benefit period with coinsurance after day 20.
- Home health services require a doctor’s order and must be intermittent skilled care; covered under both Part A and Part B.
- Ambulance transport is covered only when other transportation would endanger the patient’s health.
Prescription Drug Coverage and Additional Benefits
Beyond the core parts, many seniors rely on supplemental options to fill gaps in coverage. These options can reduce out‑of‑pocket spending for drugs, dental, vision, and hearing.
- Stand‑alone Part D plans vary widely in premium, deductible, and formulary; use the Medicare Plan Finder to compare.
- Medigap (Medicare Supplement) policies cover Part A and B cost‑sharing but do not include drug coverage; they are standardized by letter (e.g., Plan G, Plan N).
- Medicare Advantage plans often embed dental, vision, hearing, and fitness benefits; check the plan’s Evidence of Coverage for specifics.
- Extra Help (Low‑Income Subsidy) reduces Part D premiums, deductibles, and copayments for qualifying individuals.
- State Pharmaceutical Assistance Programs (SPAPs) may provide additional drug cost relief for residents.
How to Verify Your Coverage
Before receiving any service, seniors should confirm that the provider accepts Medicare assignment and that the service is covered under the appropriate part. A few practical steps can save time and money.
- Ask the provider’s billing office to verify Medicare participation and provide an estimate of cost‑sharing.
- Use the Medicare.gov “Coverage” tool to search for specific services and see if they are covered.
- Review the annual Medicare & You handbook mailed each fall for updates on benefits and premiums.
- Contact the State Health Insurance Assistance Program (SHIP) for free, personalized counseling.
- Keep a current list of medications and compare it against your Part D formulary each enrollment period.