12.3 Basic and Major Medical Coverage, Deductibles/Coinsurance/OOP

Medical expense insurance historically came in two structures the exam still tests heavily: basic medical expense and major medical expense. Understanding how they differ — and how they combine — is essential to answering cost-sharing questions.

Basic plans pay first-dollar benefits, usually with no deductible, but only for narrowly scheduled services such as hospital room-and-board, surgical fees, and physician visits, each capped at a low limit. Major medical plans provide broad, high-limit, catastrophic coverage but apply cost-sharing in the form of a deductible, coinsurance, and an out-of-pocket maximum.

Basic vs. Major Medical

Comprehensive major medical combines a basic plan with a supplemental major-medical plan into a single policy. A corridor deductible sits between where basic benefits end and major-medical coverage begins, requiring the insured to pay a set amount before the major-medical layer responds.

Cost-Sharing Components

The four cost-sharing terms below appear on nearly every health exam, and the distinctions between them are common trick-question material:

• Deductible — the amount the insured pays out of pocket before the insurer pays anything. Variants include flat/initial (per claim), annual/calendar-year (resets yearly), family (an aggregate cap), and carryover (last-quarter expenses apply to next year's deductible).
• Coinsurance — the percentage split after the deductible; an 80/20 plan pays 80% while the insured pays 20%.
• Copayment — a fixed dollar amount per service, for example $30 per visit.
• Out-of-pocket (OOP) maximum / stop-loss — once the insured's spending reaches this cap, the insurer pays 100% of covered charges for the rest of the year.

Worked Numeric: Deductible, Coinsurance, and Stop-Loss

A major-medical plan has a $1,000 deductible, 80/20 coinsurance, and a $3,000 out-of-pocket maximum on the insured's total spending. The insured incurs $26,000 in covered charges.

1. The insured pays the $1,000 deductible, leaving $25,000 of charges.
2. Coinsurance would be 20% of $25,000 = $5,000, but that pushes the insured past the cap.
3. Because the insured has already paid the $1,000 deductible, only $2,000 of coinsurance applies before the $3,000 cap is reached.
4. Once the insured has paid $3,000 total, the insurer pays 100% of the remainder.

Insured total = $3,000. Insurer total = $23,000. Always test whether the OOP cap is reached before finishing the coinsurance math.

Traps and Special Provisions

Exam writers love to swap definitions or hide a stop-loss interaction. Watch for these recurring points:

• Coinsurance vs. copayment — coinsurance is a percentage; a copay is a flat fee. Questions frequently switch the two definitions.
• Common accident / family deductible — when several family members are injured in one accident, only one deductible applies to all of them.
• Stop-loss protects the insured — it caps the insured's exposure, not the insurer's. The insurer's maximum exposure is instead the policy's lifetime or annual maximum benefit.
• Usual, customary, and reasonable (UCR) — major medical pays charges up to a UCR ceiling; amounts above UCR are the insured's responsibility and often do not count toward the OOP maximum.

Putting the Layers Together

Think of medical expense coverage as stacked layers. The basic layer pays first dollars for a few scheduled services. The corridor deductible bridges the gap. The major-medical layer then absorbs large, comprehensive expenses subject to deductible and coinsurance.

The stop-loss sits on top, ending the insured's cost-sharing once spending hits the OOP maximum. Reading a question, first identify which layer is being charged, then apply the deductible, then coinsurance, and finally test the stop-loss. This disciplined order prevents the most common calculation errors candidates make under time pressure.

Basic vs. major medical and the cost-sharing tools

Basic medical plans pay first-dollar benefits (often no deductible) but only for scheduled services up to fixed dollar limits — historically hospital, surgical, and physician 'basic' benefits. Major medical provides broad, high-limit coverage for the wide range of medical expenses, subject to a deductible and coinsurance, and is the backbone of modern comprehensive plans.

Worked cost-sharing example and special provisions

Worked example (80/20 plan, $1,000 deductible, $5,000 OOP max): An insured incurs $11,000 of covered charges.

• Insured pays the $1,000 deductible first.
• Remaining $10,000 is split 80/20: insured's 20% coinsurance = $2,000.
• Insured's total cost so far = $1,000 + $2,000 = $3,000, which is below the $5,000 OOP max, so it stands.
• The insurer pays $10,000 × 80% = $8,000.

If charges were large enough that the insured's deductible + coinsurance reached $5,000, the stop-loss kicks in and the insurer covers 100% of further covered charges that year.

Two provisions to know: A common-accident provision applies a single deductible when several family members are injured in the same accident. Usual, customary, and reasonable (UCR) limits set the maximum the plan recognizes for a service; charges above UCR are the insured's responsibility (balance billing).