12.1 Group Health Fundamentals and Eligibility

Group Health Fundamentals and Eligibility

Group health insurance covers a defined group of people under a single master contract issued to the plan sponsor (usually the employer). Individual members do not receive a policy; they receive a certificate of coverage that summarizes benefits, exclusions, and rights. This is the single most-tested structural fact about group insurance, so memorize it: the employer holds the master policy and is the policyowner; the employee is the insured covered under that policy.

Because one contract covers many lives, group insurance is experience rated as a block rather than individually underwritten person-by-person. The result is lower per-person cost and broad access, including coverage for people who could not qualify for individual medical insurance on their own health history.

Eligible groups

To prevent groups formed solely to buy insurance (adverse selection), states require that a group exist for a purpose other than obtaining insurance. Common eligible group types:

• Single-employer groups — the most common; employer sponsors coverage for its employees.
• Multiple-employer trusts (METs) and multiple-employer welfare arrangements (MEWAs) — small employers pool to gain group purchasing power.
• Labor union / Taft-Hartley groups — union is the sponsor.
• Trade associations — members of a bona fide association.
• Debtor groups — creditor insures lives of debtors (credit health).

The principle the exam tests: a group must be formed for a reason that is not the purchase of insurance.

Eligibility, probationary, and enrollment periods

Group plans use three key time windows. Confusing them is a classic exam trap, so anchor each one:

To be eligible, an employee generally must be full-time and actively at work. The actively-at-work provision means coverage attaches only when the employee is performing normal duties on the effective date—an employee out sick on day one may have coverage delayed.

Late enrollees and dependents

An employee who declines coverage during the eligibility period and later wants to join is a late enrollee. Late enrollees may be required to provide evidence of insurability or wait for the next open enrollment, because they represent adverse-selection risk.

Dependent coverage extends to a spouse and children. Under the Affordable Care Act, plans that offer dependent coverage must allow children to remain on a parent's plan to age 26, regardless of student status, marriage, or financial dependency. A newborn or newly adopted child is covered automatically, with notice typically required within 31 days.

Master Policy, Certificates, and Eligible Groups

Group health is issued as one master contract to the sponsor (employer, association, or trust); each covered person receives a certificate of coverage summarizing benefits — the certificate is evidence of coverage, not the contract itself. To prevent groups formed solely to buy insurance (adverse selection), the law recognizes valid groups such as single-employer, multiple-employer trusts (METs), labor unions (Taft-Hartley), and bona-fide associations.

Eligibility Waiting Periods and Enrollment

A new hire typically serves an employer eligibility waiting period (ACA caps it at 90 days) before coverage starts, then has an enrollment period to elect. Missing the initial window forces the employee to a late-enrollment status, which may require evidence of insurability or waiting for open enrollment.

Worked Example: An employee hired May 1 with a 60-day waiting period becomes covered July 1 if they enroll on time. Declining now and trying to join in September forces them to wait for the group's open enrollment, discouraging the "buy only when sick" behavior that group rating is designed to prevent.

Exam Tip: Because the group is underwritten as a unit, individual employees generally need no medical evidence if they enroll when first eligible — a major advantage over individual coverage.

Coordination of benefits (COB) — a worked example

When a person is covered by two group plans, a coordination of benefits provision prevents paying more than 100% of the loss. The birthday rule determines which parent's plan is primary for a dependent child: the plan of the parent whose birthday falls earlier in the calendar year (month/day, not birth year) pays first.

Worked numeric: A child incurs a $1,000 covered claim. Mom's birthday is March 3; Dad's is August 12. Mom's plan is primary and pays per its schedule (say 80% = $800). Dad's plan is secondary and may pay the remaining $200, but total reimbursement never exceeds the $1,000 actual charge.

Effective dates and the actively-at-work rule in practice

Group coverage typically takes effect on the first of the month after the probationary period, but only if the employee is actively at work that day. If an employee is hospitalized on the scheduled effective date, the carrier may delay attachment until the employee returns to active duty. This protects the pool from someone enrolling while a claim is already in progress.

Dependents follow a parallel rule: a dependent confined to a hospital on the effective date may have coverage deferred until discharge, except for newborns, who are covered from the moment of birth. Test items often hide the actively-at-work delay inside a fact pattern about a sick new hire.

Comparing group and individual health insurance

The exam reliably asks how group coverage differs from an individual policy. Hold these contrasts:

The headline advantage of group coverage is access without individual medical underwriting, which is why a healthy and an unhealthy employee pay the same group rate.