Group Contracts and Participation

Master Policy and Certificates of Coverage

In group health insurance, the contract structure differs significantly from individual policies. In a fully insured group plan, the insurer issues a master policy to the group sponsor; a self-funded employer plan does not have an insurer-issued master health insurance policy. The group sponsor acts as the policyowner and holds this master contract. Because the contract is held centrally, group health plans generally provide coverage at lower administrative costs per person than individual policies.

Individual group members do not receive separate insurance policies. In a fully insured group plan, covered members generally receive certificates of coverage; members of a self-funded plan receive plan documents rather than insurer-issued certificates of insurance. This document serves as evidence of insurance protection. It identifies the covered member, may list covered dependents, and summarizes the member benefits, coverage limits, and claim filing procedures.

Consider an employee named Jordan who is hired by a manufacturing firm. The firm purchases group major medical coverage from a commercial insurer. The firm holds the master policy in its human resources office, while Jordan receives a certificate of coverage outlining deductibles, copayments, covered services, and the procedure for filing claims. Jordan does not hold an individual insurance contract with the insurer.

Eligible Group Types and Underwriting Protections

To obtain group insurance, an eligible group generally must exist for a purpose other than obtaining insurance, subject to applicable law. A group formed solely to obtain insurance generally does not qualify under traditional group insurance rules. For instance, a retail discount customer group does not automatically qualify for group health insurance; eligibility depends on the group's structure and applicable legal guidelines.

The single-employer group, in which an employer provides benefits to its eligible employees, represents the most common type of group health insurance arrangement. Other arrangements exist to serve various populations. Multiple employer trusts allow two or more employers to obtain group insurance through a trust, subject to federal and state requirements, and participating employers need not always be in related industries. A multiple employer welfare arrangement generally provides or offers health or other welfare benefits to employees of two or more employers, subject to statutory exceptions. Labor unions may sponsor coverage for their members, including Taft-Hartley plans that are jointly maintained by labor unions and employers. Professional and trade associations can also sponsor coverage for active members, though state law may set organizational and operating-history requirements, such as requiring bylaws, active membership, and regular meetings. In addition, creditor-debtor groups may provide credit disability insurance to help make loan payments if a covered borrower becomes disabled, with the creditor generally holding the master policy and receiving benefits applied to the debt.

Underwriting in group coverage focuses on the broad risk profile rather than individual health screening for Affordable Care Act (ACA) compliant major medical plans. Individual health underwriting may still apply to disability income insurance, which is a health insurance product but is not ACA major medical coverage. However, ACA-compliant major medical coverage cannot be priced or denied based on an applicant's health. Insurers may evaluate a group's overall risk when permitted, but ACA-compliant group major medical coverage cannot be denied because of members' health, and small-group premiums cannot be based on the group's claims experience.

Plan Funding and Participation Rules

Group plans may be described as contributory or noncontributory based on who pays the premium; separately, a plan may be fully insured or self-funded. In a noncontributory group plan, the employer pays the full premium for employee coverage; employees may still pay for dependent coverage. Because employees pay nothing toward the coverage, traditional noncontributory group insurance often requires participation by all eligible employees, though applicable requirements and exceptions vary by jurisdiction. In a contributory group health plan, employees pay part of the premium, and the employer may also contribute.

Insurers enforce participation requirements primarily to protect against adverse selection. Adverse selection is the tendency of individuals with poorer health or higher expected claims to enroll in insurance at higher rates than healthier individuals. Without minimum participation rules in a contributory plan, healthier employees might choose to decline coverage to save money, leaving only less healthy employees enrolled. Participation minimums for contributory group plans vary by insurer, market, and state, meaning there is no universal 75 percent rule.

When calculating participation percentages, employees who have other qualifying coverage may be excluded under applicable rules, though waiver requirements vary. However, an eligible employee who declines coverage without a qualifying waiver may count against the plan's participation minimum. An insurer may apply a permitted minimum participation requirement when issuing or renewing group coverage, subject to applicable guaranteed-availability rules. High participation can reduce adverse selection, but it does not guarantee a balanced spread of risks.

Employee Eligibility and Enrollment Guidelines

Employers establish baseline eligibility criteria within their plans, subject to applicable law. Full-time employment status is a standard eligibility requirement established by employers in group health plans. Employers may set hours-of-service rules for plan eligibility; for example, the ACA generally treats an employee averaging at least 30 hours of service per week as full-time for employer shared-responsibility purposes.

Employers frequently require newly hired workers to complete a probationary period. An employer may set bona fide employment-based eligibility conditions, but cannot use them to evade the ACA rule that generally limits the waiting period to 90 days after an employee is otherwise eligible. This provision helps eliminate administrative expenses from high employee turnover, ensuring that the company only enrolls individuals who remain employed past an initial timeframe.

For ACA-compliant group major medical coverage, eligible employees generally enroll during designated enrollment periods without health-based underwriting. Group plans typically hold an annual open enrollment period when eligible employees can enroll, add eligible dependents, or change available coverage options without health-based underwriting for major medical benefits. An employee who misses initial enrollment and does not qualify for a special enrollment opportunity generally must wait until the next open enrollment period. Health-based evidence of insurability is not required for these ACA-compliant major medical plans.

Group health insurance contracts may also cover dependents, including spouses and dependent children of the covered employee. Federal law requires group health plans that offer dependent child coverage to make that coverage available until the child reaches age 26. Being unmarried is not a general ACA requirement for this dependent child coverage. Depending on the plan terms and state law, coverage may continue beyond age 26 for a child who meets the plan's disability and dependency requirements.

Group Rating Methods and Coverage Conversion

Depending on the market and applicable law, insurers may use adjusted community rating, experience rating, manual rating, or a combination of permitted methods to set group premiums. Community rating pools costs rather than pricing a group by its own claims. ACA-compliant small-group health plans use adjusted community rating rather than each group's own claims experience. Premiums for ACA-compliant individual and small-group major medical coverage cannot be based on an applicant's or group's health or claims history; permitted rating factors are limited to age, geographic location, tobacco use, and family size.

In contrast, experience rating considers a group's past claims history when setting its future premium, subject to applicable rating rules. Larger fully insured groups are more likely to have premiums based partly on their own claims experience because their claims data are statistically credible. A large employer with thousands of workers provides a broad enough pool for an insurer to evaluate past claims and project future costs reliably.

When an employee leaves a job or loses eligibility, coverage ends according to the plan's terms; the employee may have options to continue coverage or enroll in other coverage. Some group policies offer a conversion privilege when coverage ends, allowing the individual to convert group protection to an individual policy, but availability depends on applicable law and the policy terms. Where a group-to-individual conversion privilege applies, state law or the policy sets its exercise deadline; a 31-day window is common but not universal. Even without a policy conversion feature, ACA-compliant individual major medical coverage is generally available in the market without health-based underwriting.