Managing medical expenses begins with knowing what each payment term actually means on your medical bills:

• Premium: The fixed amount you pay each month to keep your insurance active, regardless of whether you use medical services.
• Deductible: What you must pay out of pocket for covered healthcare services before your plan begins to pay its share.
• Copayment (Copay): A flat dollar fee you pay at the time of service (e.g., $20 for a primary care doctor visit or $10 for a generic prescription).
• Coinsurance: Your percentage share of the cost of a covered service (e.g., Original Medicare pays 80% of an approved outpatient service, and you pay the remaining 20%).

A common misconception is that Original Medicare (Parts A & B) covers all medical expenses. In reality, Original Medicare leaves major financial exposures:

• Part A Hospital Deductible: Charged per benefit period, not per calendar year. If you are admitted to the hospital multiple times in different benefit periods throughout a year, you may have to pay this deductible more than once.
• The Unlimited 20% Coinsurance in Part B: After meeting your annual Part B deductible, you are responsible for 20% of every doctor visit, diagnostic lab, MRI scan, chemotherapy treatment, and outpatient procedure.
• No Out-of-Pocket Maximum: Unlike commercial employer insurance or Medicare Advantage plans, Original Medicare has no legal ceiling on out-of-pocket costs. A serious illness or surgical complication can result in tens of thousands of dollars in medical bills.

Medicare Supplement (Medigap) insurance is specifically structured to eliminate the financial gaps left open by Original Medicare.

• Full Part B Coinsurance Coverage: Plans like Plan G pay 100% of your 20% coinsurance obligations. Once you meet your small annual Part B medical deductible, your covered outpatient visits and treatments cost $0 out-of-pocket.
• Protection Against Part A Hospital Deductibles: Medigap covers the hefty inpatient deductible and extends your hospital lifetime reserve days.
• Budget Predictability: By trading unpredictable pay-as-you-go medical coinsurance for a predictable monthly premium, you shield your retirement savings from catastrophic healthcare events.

Recent federal prescription reforms have introduced historic safeguards against escalating drug prices:

• The Annual Out-of-Pocket Drug Cap: Out-of-pocket spending for covered formulary medications under Part D is legally capped at $2,100 per year. Once your payments reach this threshold, your copays drop to $0 for the remainder of the calendar year.
• $35 Monthly Insulin Cap: Covered insulin prescriptions cannot exceed $35 per 30-day supply, regardless of your plan's deductible status.
• Medicare Prescription Payment Plan: If you take high-cost medications early in the year, you can opt into this payment model to smooth your pharmacy expenses into equal, interest-free monthly installments across the year instead of paying large sums at once.