12.3 Basic and Major Medical Coverage, Deductibles/Coinsurance/OOP
Key Takeaways
- Basic medical expense (hospital, surgical, physician) pays first dollars with no deductible but low limits, while major medical covers high or unlimited catastrophic costs.
- Comprehensive major medical integrates basic and major medical under one deductible and one coinsurance percentage; supplementary major medical layers on top of a basic plan.
- A corridor deductible bridges the gap between exhausted basic coverage and supplementary major medical benefits.
- Apply cost-sharing in order: deductible first, then coinsurance on the balance, then the out-of-pocket maximum, which the insured never exceeds.
- The out-of-pocket maximum includes the deductible and coinsurance; once reached, the plan pays 100% of covered charges for the rest of the year.
Medical expense insurance historically came in two layers — basic coverage that paid first dollars without a deductible, and major medical that paid the large, catastrophic costs. Understanding the legacy structure clarifies why modern comprehensive major medical plans use deductibles, coinsurance, and out-of-pocket caps.
Basic Medical Expense Coverage
Basic medical expense plans pay defined benefits with no deductible but low limits, so they are first-dollar but shallow. The three classic basic coverages are:
| Basic Coverage | Pays For | Common Limit Structure |
|---|---|---|
| Hospital expense | Room and board, miscellaneous hospital charges | Daily room cap × number of days; separate misc. limit |
| Surgical expense | Surgeon's fee | Scheduled amount per procedure, or usual/customary |
| Physician (medical) expense | Non-surgical doctor visits in hospital | Per-visit dollar cap, limited number of visits |
Because limits are low, a serious illness quickly exhausts basic benefits — which is exactly the gap major medical fills.
Major Medical and Comprehensive Plans
Major medical coverage provides high or unlimited lifetime maximums (the ACA prohibits annual and lifetime dollar limits on essential health benefits), broad coverage of services, and cost-sharing through a deductible and coinsurance.
There are two structures the exam contrasts:
- Supplementary major medical — sits on top of a basic plan; it kicks in after basic benefits are exhausted, often with a corridor deductible bridging the two.
- Comprehensive major medical — a single integrated policy combining basic and major medical with one deductible and one coinsurance percentage. This is the dominant modern form.
Exam Tip: A corridor deductible is the gap the insured must pay between the point basic coverage ends and supplementary major medical begins — a frequently tested term.
Cost-Sharing Mechanics
Three levers determine the insured's share. Apply them in this fixed order:
- Deductible — the annual amount the insured pays before the plan pays anything (except services the plan covers pre-deductible, like ACA preventive care).
- Coinsurance — the percentage split (e.g., 80/20) applied to covered charges after the deductible.
- Out-of-pocket (OOP) maximum — the annual ceiling on the insured's combined deductible, coinsurance, and copays; once reached, the plan pays 100% of covered charges for the rest of the year.
| Deductible Type | Meaning |
|---|---|
| Per-person (individual) | Each covered person meets their own deductible |
| Family | Aggregate that, once met, satisfies the deductible for all members |
| Embedded | Individual cap inside a family deductible; one member can meet theirs before the family amount |
| Carryover | Expenses in the last months (often Oct–Dec) apply to next year's deductible |
Stop-Loss and First-Dollar Coverage
The out-of-pocket maximum is sometimes called the stop-loss limit because it stops the insured's losses for the year. Plans with no deductible on certain services provide first-dollar coverage — the insurer pays from the first dollar, as basic plans and ACA preventive care do. The trend in modern plans is away from broad first-dollar coverage and toward higher deductibles paired with a firm stop-loss, which keeps premiums lower while still protecting the insured from catastrophic bills. Recognizing these labels helps decode exam stems quickly.
Eligible Expenses and Exclusions
Major medical pays only for medically necessary care for a covered condition. Common exclusions the exam tests include cosmetic surgery, experimental treatment, services covered by workers' compensation, and care that is not medically necessary. Coordination-of-benefits rules prevent an insured from collecting more than 100% of expenses when two plans apply. Because the ACA mandates essential health benefits and bars annual and lifetime dollar limits, modern major medical is far broader than the legacy basic-plus-supplementary structure, but the cost-sharing math is identical.
Worked Example — Deductible, Coinsurance, and OOP Max
An insured has a $2,000 deductible, 70/30 coinsurance, and a $6,000 out-of-pocket maximum. She incurs $30,000 of covered charges this year.
- Step 1 — Deductible: insured pays $2,000; $28,000 remains.
- Step 2 — Coinsurance on the balance: insured's 30% of $28,000 = $8,400; insurer's 70% = $19,600.
- Step 3 — Apply the OOP cap: deductible + coinsurance so far = $2,000 + $8,400 = $10,400, but the cap is $6,000.
- The insured pays only $6,000 total; the insurer pays the rest, $30,000 − $6,000 = $24,000, and covers 100% of any further charges this year.
Trap: The OOP maximum includes the deductible and coinsurance. Once the insured has paid $6,000 combined, she stops paying — the plan does not make her satisfy the coinsurance percentage forever.
An insured with a $1,000 deductible, 80/20 coinsurance, and a $4,000 out-of-pocket maximum incurs $50,000 in covered charges. What does the insured pay for the year?
Which term describes the amount an insured must pay in the gap after basic coverage is exhausted but before supplementary major medical benefits begin?
Deductible Types You Must Distinguish
| Deductible Type | How It Works |
|---|---|
| Per-cause (per-occurrence) | Applies separately to each new illness/injury |
| Calendar-year (all-cause) | One deductible per year for all claims combined |
| Family deductible | Aggregate cap so a family stops paying individual deductibles |
| Carryover | Late-year expenses count toward next year's deductible |
| Corridor | A deductible between basic and major medical layers |
Modern comprehensive plans use a calendar-year, all-cause deductible the insured satisfies one deductible per year, after which coinsurance begins. A family deductible caps total family exposure once an aggregate amount is met.
Under a calendar-year, all-cause deductible, an insured who has already met the annual deductible and then develops a new, unrelated illness must:
Out-of-Pocket Maximum and Stop-Loss
The out-of-pocket (OOP) maximum (stop-loss limit) caps the insured's total cost-sharing for the year. Once the insured's combined deductible + coinsurance reaches the OOP max, the plan pays 100% of remaining covered expenses for the year.
Worked example: $2,000 deductible, 80/20 coinsurance, $6,000 OOP max. After the deductible, the insured pays 20% until their coinsurance share plus the deductible totals $6,000; from that point the plan pays everything covered. (Premiums and non-covered charges never count toward the OOP max.)
Exam Tip: The OOP maximum protects against catastrophic cost; it limits what the insured pays, not what the plan pays. Premiums do not count toward it.