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Medicare Parts B & D

Medical Insurance & Prescription Drug Coverage

Quick Facts

Combined Annual Spending

$549 Billion

Part B Beneficiaries

64+ Million

Part D Beneficiaries

50+ Million

Part B Premium (2024)

$174.70

per month

How Parts B & D Are Funded

Unlike Part A, Medicare Parts B and D are funded through a combination of:

  • Monthly premiums: Beneficiaries pay $174.70/month (2024) for Part B, varying amounts for Part D
  • General federal revenues: About 75% of Part B costs funded through general tax revenue
  • Income-related surcharges: Higher earners pay additional monthly premiums (IRMAA)
  • Deductibles and coinsurance: Cost-sharing at point of service

Note: Parts B and D are optional (though highly recommended). Most beneficiaries pay monthly premiums deducted from their Social Security checks.

What Medicare Part B Covers

Medical Services

Doctor visits, outpatient care, preventive services, medical equipment, and ambulance services. Covers medically necessary services to diagnose or treat a medical condition.

Preventive Care

Annual wellness visits, screenings (cardiovascular, cancer, diabetes), vaccines (flu, pneumonia), and other preventive services at no cost when using in-network providers.

Durable Medical Equipment

Wheelchairs, walkers, hospital beds, oxygen equipment, and other medical equipment prescribed by a doctor for home use.

Mental Health Services

Outpatient mental health care, including therapy and counseling. Covers visits with psychiatrists, psychologists, and clinical social workers.

What Medicare Part D Covers

Prescription Drugs

Outpatient prescription drugs through private insurance plans. Each plan has a formulary (list of covered drugs) organized into tiers with different copayments.

2025 Improvements

Starting in 2025, Part D includes new protections: $2,000 annual out-of-pocket cap, $35 monthly insulin cap, free vaccines, and the ability to spread costs across the year.

2024 Costs & Deductibles

Part B Monthly Premium$174.70

Standard premium (higher for high earners)

Part B Annual Deductible$240

Per year

Part B Coinsurance20%

Of Medicare-approved amount (after deductible)

Part D Average Premium$55.50

Monthly (varies by plan)

Learn More

What Part B Covers

Official Medicare.gov coverage details

Part D Drug Coverage

Prescription drug plan information

2024 Premiums & Deductibles

CMS official cost information