14.2 Dental, Vision, and Limited Benefit Plans

Dental Insurance

Dental plans are written either as scheduled (a fixed dollar list per procedure), nonscheduled / comprehensive (usual, customary, and reasonable percentages), or a combination. Coverage is grouped into classes:

• Diagnostic & preventive — exams, cleanings, x-rays; usually paid at 100% with no deductible to encourage early care.
• Basic / restorative — fillings, extractions, root canals; typically 80% after deductible.
• Major — crowns, bridges, dentures; typically 50%.
• Orthodontia — optional rider, often a separate lifetime maximum.

Most dental plans carry an annual maximum (e.g., $1,500) rather than the lifetime maximum common to medical plans, and orthodontia is paid to a separate lifetime cap.

Dental Cost-Sharing and Provisions

A key exam point: in dental insurance the deductible and coinsurance often do NOT apply to preventive services, the reverse of major medical logic, because insurers want to incentivize checkups that head off expensive restorative work.

Dental plans frequently include a predetermination of benefits (preauthorization) provision: for work above a dollar threshold the dentist submits a treatment plan so the insurer estimates payment before treatment begins. Plans also use missing-tooth and waiting-period clauses to control adverse selection — for example, replacement of a tooth lost before the policy's effective date may be excluded.

Vision Plans

Vision insurance is a limited benefit product that covers routine eye exams, lenses, frames, and contact lenses on a scheduled basis with set allowances (e.g., $150 frame allowance every 24 months). It does not cover medical or surgical eye disease — that falls under major medical. Benefits renew on a frequency schedule rather than an annual deductible, and many plans run through a provider network that discounts in-network purchases while paying a reduced out-of-network allowance.

Limited Benefit (Defined Benefit) Plans

Limited benefit plans pay a fixed dollar amount for a narrowly defined event regardless of actual charges. They are inexpensive and supplement, never replace, comprehensive coverage. Federal rules require these plans to disclose prominently that they are not minimum essential coverage under the ACA, so an applicant who buys only a limited plan does not satisfy any coverage mandate and is exposed to large uncovered losses.

Common Limited-Benefit Types

Because these plans pay on an indemnity (valued) basis, benefits are paid directly to the insured and are not coordinated with other coverage — the insured can collect from a major medical plan and the limited plan for the same event. That stacking is the selling point and a frequent exam distractor.

Coordination of Benefits in Dental and Reimbursement Plans

When a person is covered by two reimbursement-style dental plans (for example, both spouses' employer plans), a coordination of benefits (COB) provision prevents the insured from collecting more than 100% of the actual cost. The primary plan pays first up to its limits; the secondary plan pays the remaining eligible expense up to its own schedule.

Worked COB example. A dental procedure costs $1,000. The primary plan pays 80% = $800. The secondary plan would have paid 50% = $500 on its own, but COB limits the total to the actual cost, so it pays only the $200 balance. The insured pays $0, and the secondary plan never pays more than it would have alone. Note that indemnity limited-benefit plans do NOT coordinate — only reimbursement plans do.

Dental Structure and Vision Plan Design

Dental plans are tested for their tiered benefit structure, which the exam pairs with familiar coinsurance percentages. Care divides into three classes: preventive and diagnostic (cleanings, exams, X-rays), often covered at 100% with no deductible to encourage early care; basic (fillings, extractions, root canals), commonly covered at 80% after a deductible; and major (crowns, bridges, dentures), commonly covered at 50%. Plans impose an annual maximum, often $1,000 to $2,000, after which the member pays in full, and orthodontia, if covered at all, carries a separate lifetime maximum.

Distinguish scheduled (indemnity) dental, which pays a fixed dollar amount per procedure, from comprehensive dental, which pays a percentage of usual-and-customary charges.

Vision plans cover routine eye exams, lenses, and frames or contacts on a periodic schedule, such as one exam and one pair of lenses per year with frames every two years, and they typically use either a network discount model or a fixed allowance toward materials. Both dental and vision are commonly written as limited-benefit or excepted benefits, meaning they are not subject to the full ACA essential-health-benefit mandates the way major medical is.

Apply the coordination rule from the worked example: when a person has two reimbursement dental plans, COB designates a primary that pays first and a secondary that pays only the remaining balance up to the actual charge, never producing a profit, while two indemnity plans each pay their fixed scheduled amount independently because indemnity benefits do not coordinate. Recognizing whether a limited-benefit plan is reimbursement or indemnity therefore decides whether COB even applies, which is the most common trap in this section.