Medicare, Medicaid, and ACA: Practice Questions & Explanations

Medicare is the federal health insurance program for Americans aged 65 and older who have paid Medicare taxes (or whose spouse has paid Medicare taxes) for at least 10 years (40 quarters). People under 65 may also qualify if they have received Social Security Disability Insurance (SSDI) benefits for 24 months, have End-Stage Renal Disease (ESRD), or have Amyotrophic Lateral Sclerosis (ALS). Medicare is distinct from Medicaid (which is income-based and jointly state-federal). Medicare has four parts: Part A (hospital insurance, usually premium-free for those who paid in), Part B (medical insurance, monthly premium), Part C (Medicare Advantage, private plans replacing A and B), Part D (prescription drug coverage). Most beneficiaries also use Medigap supplemental policies to cover gaps in original Medicare.

Medicare Part A is hospital insurance, covering: (1) Inpatient hospital stays — semi-private room, meals, general nursing, drugs received in hospital; (2) Skilled nursing facility care (limited, after a qualifying hospital stay); (3) Hospice care for terminally ill patients; (4) Some home health services (intermittent skilled care, not custodial). Part A is usually premium-free for beneficiaries (or their spouse) who paid into Medicare for 40+ quarters during their working years. It has a deductible per benefit period and co-insurance for longer stays. Part B covers outpatient care, doctor visits, preventive services, durable medical equipment, and other medically necessary services that are not hospital stays. Part D covers prescription drugs.

The Affordable Care Act (ACA, also called Obamacare) is a federal law passed in 2010 that significantly reformed US health insurance. Key provisions: (1) Pre-existing condition protections — insurers in individual and small group markets cannot deny coverage or charge more based on health history; (2) Essential Health Benefits — ACA-compliant plans must cover 10 categories of essential benefits (ambulatory care, emergency services, hospitalization, maternity, mental health, prescription drugs, rehab, lab, preventive, pediatric); (3) Health Insurance Marketplaces (Exchanges) — state and federal websites where individuals can compare and buy plans; (4) Premium Tax Credits — subsidies for households earning 100-400%+ of federal poverty level; (5) Medicaid expansion (state-optional); (6) Individual mandate (federal penalty reduced to $0 in 2019 but still applies in some states); (7) Employer mandate for large employers.

ACA marketplace plans are organized into four metal tiers based on actuarial value (AV) — the percentage of total healthcare costs the plan covers on average for a typical population. Bronze: ~60% AV (insurer pays 60%, members pay 40% through deductibles, copays, co-insurance); Silver: ~70% AV; Gold: ~80% AV; Platinum: ~90% AV. Higher metal tiers have higher premiums but lower cost-sharing. Catastrophic plans exist for those under 30 or with hardship exemptions, with very high deductibles. Silver plans qualify for cost-sharing reductions for households earning 100-250% of federal poverty level, which can effectively boost Silver to Gold or Platinum levels of coverage at Silver premium prices. The tier system helps consumers compare plans without needing actuarial expertise.

Medicaid and Medicare are easily confused but serve different populations. Medicaid is a joint federal-state program (states administer with federal matching funds) providing health coverage to low-income individuals and families, based on income and family size. Eligibility rules and benefits vary by state, especially after the ACA gave states the option to expand Medicaid to all adults under 138% of federal poverty level. Medicare is a federal program for Americans 65+, certain disabled persons, ESRD patients, and ALS patients, based on age or disability rather than income. Some people qualify for both (dual-eligibles); Medicare is primary in that case. Medicaid covers nursing home care (after asset spend-down); Medicare provides only limited skilled nursing facility coverage.

MEDICARE vs MEDICAID: MEDICARE: FEDERAL health insurance program primarily for: people 65 and OLDER; certain younger people with DISABILITIES; people with End-Stage Renal Disease/ALS; based on AGE/disability (not income); PARTS: A (hospital), B (medical), C (Medicare Advantage), D (prescription drugs); MEDICAID: JOINT FEDERAL-STATE program providing coverage for LOW-INCOME individuals and families; eligibility based on INCOME/NEED (and category — children, pregnant women, elderly, disabled); administered by states within federal guidelines (eligibility and benefits vary by state); MEMORY AID: MedicARE for the AGED (65+); MedicAID for those who need AID (low income); DUAL ELIGIBLE: Some people qualify for both; MEDICARE SUPPLEMENT (Medigap): Private insurance to cover Medicare's gaps (deductibles, coinsurance); understanding the distinction — Medicare (federal, age/disability-based) vs Medicaid (federal-state, income/need-based) — is fundamental health insurance exam content on government programs.

THE PARTS OF MEDICARE: PART A — HOSPITAL INSURANCE: Inpatient hospital stays, skilled nursing facility, hospice, some home health; most pay no premium (earned through work history); PART B — MEDICAL INSURANCE: Doctor visits, outpatient care, preventive services, medical equipment; requires a monthly premium; PART C — MEDICARE ADVANTAGE: PRIVATE plans (HMO/PPO) that combine Part A and B (and usually D) into one plan, often with extra benefits; an alternative to Original Medicare; PART D — PRESCRIPTION DRUG COVERAGE: Optional prescription drug plans (private); MEDIGAP (Medicare Supplement): Separate private insurance to cover Original Medicare's gaps (deductibles, coinsurance) — works with Original Medicare, not Medicare Advantage; ORIGINAL MEDICARE = Parts A + B (+ optional D and Medigap); MEDICARE ADVANTAGE = Part C (bundled alternative); understanding the four parts of Medicare (A-hospital, B-medical, C-Advantage, D-drugs) and how they fit together is important government-programs content on the health insurance exam.

Medicare is a federal health insurance program primarily for people age 65 and older, and also for certain younger individuals with qualifying disabilities or end-stage renal disease. It has parts: Part A (hospital insurance), Part B (medical insurance for physician and outpatient services), Part C (Medicare Advantage, private plans that bundle benefits), and Part D (prescription drug coverage). Medicare is distinct from Medicaid, which is a joint federal-state program for low-income individuals. Understanding what Medicare is, whom it covers, and its basic parts is standard government-programs content on the health insurance exam.

Medicaid is a joint federal-state program that provides health coverage primarily to low-income individuals and families, with eligibility based on income and other factors (and rules that vary by state, since states administer their own programs within federal guidelines). Medicare, by contrast, is a federal program based mainly on age (65+) or disability, regardless of income. Some individuals qualify for both ('dual eligibles'). The key distinction is the basis of eligibility: Medicaid is needs-based (income), while Medicare is age/disability-based. Because state Medicaid rules differ, exam answers often note this variation. This Medicare-versus-Medicaid distinction is commonly tested.