9.2 Medical Expense Insurance (Basic and Major Medical)

Key Takeaways

  • Basic medical expense (hospital, surgical, physicians') pays first dollar but has low internal limits per category.
  • Major medical adds a deductible, coinsurance, and high overall limits to cover catastrophic costs.
  • Supplemental major medical layers over a basic plan via a corridor deductible; comprehensive major medical integrates both into one plan.
  • Deductible variations include per-cause, calendar-year, family, and carryover provisions.
  • When a stop-loss excludes the deductible, total insured exposure equals deductible plus stop-loss.
Last updated: June 2026

Medical Expense Insurance: Basic and Major Medical

Medical expense (or "medical care") insurance reimburses the cost of treating sickness and injury. Historically it developed in two layers that still drive exam terminology: Basic medical expense plans and Major medical plans. Modern comprehensive and ACA-compliant plans blend these concepts, but the exam still tests the classic distinctions.

Basic Medical Expense Plans

Basic plans are first-dollar coverage — they typically pay without a deductible but have low internal limits and cover only specified categories. Each benefit has its own maximum.

  • Hospital expense — pays room and board up to a daily limit for a set number of days, plus miscellaneous hospital charges (lab, drugs, supplies) up to a multiple of the daily room rate.
  • Surgical expense — pays surgeon fees according to a surgical schedule (a dollar amount assigned to each procedure) or a relative value scale (unit values multiplied by a conversion factor).
  • Physicians' (medical) expense — pays for non-surgical doctor visits, often a flat amount per visit up to a yearly cap.

The weakness of basic plans is that internal limits are quickly exhausted by a serious claim — which is exactly why major medical exists.

Major Medical Expense Plans

Major medical fills the gap by providing high overall limits for catastrophic costs. Its hallmarks are a deductible, coinsurance, and a high or unlimited lifetime maximum (note: the ACA bans annual and lifetime dollar limits on essential health benefits).

FeatureBasic MedicalMajor Medical
DeductibleUsually noneYes
CoinsuranceRareTypical (e.g., 80/20)
Coverage breadthSpecified, limited categoriesBroad, comprehensive
Overall limitLow internal limitsHigh / unlimited

There are two structures:

  • Supplemental major medical — sits on top of a basic plan; the basic plan pays first, then major medical covers what basic does not, after its own deductible (a corridor deductible bridges the gap between exhausted basic benefits and the start of major medical).
  • Comprehensive major medical — a single integrated plan combining basic and major medical features under one deductible and one coinsurance percentage. This is the modern standard and the one most exam scenarios assume.

Common Exclusions and Limitations

Medical expense plans define not only what they pay but what they refuse to pay. Frequently tested exclusions include cosmetic surgery (except to correct accidental injury or congenital defect), experimental or investigational treatment, services covered by workers' compensation, care received in a government facility at no charge, and self-inflicted injury in some older contracts. Plans also impose internal limits on specific services — for example, a cap on the number of covered physical-therapy visits or a separate, higher deductible for emergency-room use that is waived if the patient is admitted.

The pre-existing condition rules are central. A pre-existing condition is generally one for which the insured received treatment or advice within a defined look-back period before the policy's effective date. In ACA-compliant major medical, pre-existing condition exclusions are prohibited entirely; however, the concept still appears on exams for non-ACA products such as short-term medical, supplemental, and certain group eligibility rules.

Eligible Expenses and Reasonable Charges

Major medical reimburses usual, customary, and reasonable (UCR) charges — the prevailing fee charged by similar providers in the same geographic area. If a provider bills above UCR, the plan pays only the UCR amount and the insured may owe the balance (balance billing) unless network contracts prohibit it. Recognizing UCR explains why an out-of-network bill can leave the insured owing more than the stated coinsurance percentage alone would suggest.

Key Major Medical Provisions and Worked Numerics

Several provisions soften or sharpen cost-sharing and are heavily tested:

  • Deductible typesflat/per-cause (per illness), calendar-year/all-cause (one deductible for all claims in a year), family deductible (after two or three members meet individual deductibles, the family deductible is satisfied), and carryover (expenses in the last three months of the year apply to next year's deductible).
  • Coinsurance — typically 80/20 or 75/25; the insured's share is capped by the stop-loss.
  • Stop-loss (out-of-pocket) limit — caps insured coinsurance.

Worked Comprehensive Major Medical Example

Plan: $500 calendar-year deductible, 80/20 coinsurance, $3,000 stop-loss (excludes deductible). Covered charges = $15,500.

  1. Insured pays $500 deductible. Remaining: $15,000.
  2. Coinsurance 20% of $15,000 = $3,000, which exactly equals the stop-loss — so insured pays the full $3,000.
  3. Plan pays 80% of $15,000 = $12,000.
  4. Total insured cost = $500 + $3,000 = $3,500. Any charges above this point are paid 100% by the plan.

Trap: a stop-loss that excludes the deductible means total insured exposure = deductible + stop-loss.

Stop-Loss, Corridor Deductibles, and Plan Design

Comprehensive major medical commonly uses a coinsurance corridor (e.g., the plan pays 80%, the insured 20%) until the insured's spending hits the out-of-pocket maximum (stop-loss limit), after which the plan pays 100%. Older supplementary major medical layered a major-medical plan on top of a basic plan and used a corridor deductible between the two. The exam tests that the out-of-pocket maximum caps the insured's coinsurance exposure, while the deductible is paid before coinsurance begins.

Usual, Customary, and Reasonable (UCR)

Indemnity major medical reimburses providers up to a usual, customary, and reasonable (UCR) charge for the geographic area; a provider who bills above UCR can balance bill the insured for the difference. Managed-care plans largely replaced UCR exposure with negotiated network rates, which is one reason network plans expose the insured to less surprise cost than open indemnity coverage.

Test Your Knowledge

Which type of medical expense plan typically provides first-dollar coverage with NO deductible but imposes low internal limits on each benefit category?

A
B
C
D
Test Your Knowledge

A comprehensive major medical plan has a $500 deductible, 80/20 coinsurance, and a $3,000 stop-loss that EXCLUDES the deductible. If the insured incurs $15,500 in covered charges, what is the insured's total out-of-pocket cost?

A
B
C
D