12.1 Group Health Fundamentals and Eligibility
Key Takeaways
- The employer holds the master policy (the contract); employees hold certificates that are proof, not the contract.
- Group coverage underwrites the group as a whole, so individual medical exams are generally not required.
- Eligibility safeguards — waiting period (max 90 days), active-at-work, and full-time definition — control adverse selection.
- ACA dependent children are covered to age 26 regardless of marriage, student status, or residency.
- Special enrollment is generally 30 days from a qualifying life event; 60 days for Medicaid/CHIP.
What Group Health Insurance Is
Group health insurance covers a defined group of people — most often the employees of a single employer — under one contract. The insurer issues a single master policy (master contract) to the policyholder (the employer), and each covered employee receives a certificate of insurance. The certificate summarizes coverage and serves as proof of insurance, but it is not the legal contract; the master policy controls. When a conflict arises between the certificate and the master policy, the master policy governs.
Master Policy vs. Certificate
| Feature | Master Policy | Certificate of Insurance |
|---|---|---|
| Holder | Employer (policyholder) | Each covered employee |
| Legal status | The actual contract | Summary / proof only |
| Contents | All terms, benefits, exclusions | Highlights of coverage |
| Amendments | Negotiated employer–insurer | Reflect master policy changes |
Exam trap: A common wrong answer states the certificate is the contract. It is not — the employer holds the contract; employees hold certificates.
Parties and How the Contract Flows
Understanding the chain of parties keeps you from confusing roles on exam fact patterns. The insurer issues coverage to the policyholder, who distributes evidence of that coverage to the insureds. The flow runs: Insurer → Master Policy → Employer (policyholder) → Certificates → Employees (insureds and their dependents).
The employer negotiates terms, pays or collects premium, and administers enrollment, but the employer is not the insurer and does not adjudicate claims. The insurer bears the risk on a fully insured plan. Each insured employee is a certificate holder, and covered dependents derive their coverage through that employee.
When the master policy is amended — say, a new deductible — the change flows down to every certificate automatically; individual employees do not separately renegotiate. This is why a single late or incorrect certificate cannot override the master contract: the certificate merely reports what the master policy already says.
Why Groups Are Cheaper and Easier to Get
Group coverage is priced and underwritten on the characteristics of the group as a whole, not on each individual's health. Because the insurer underwrites the group, individual medical exams and detailed health questionnaires are generally not required, and coverage is usually guaranteed issue up to defined limits. The group itself controls adverse selection through eligibility rules rather than through per-person medical screening.
Eligibility Safeguards Against Adverse Selection
- Probationary (waiting) period — a new hire waits before becoming eligible (max 90 days under the ACA).
- Active-at-work requirement — the employee must actually be working on the effective date.
- Definition of eligible employee — full-time, generally 30+ hours/week under the ACA.
- Minimum participation — ensures a healthy mix of risks (covered in 12.2).
These rules keep individuals from buying in only when they expect large claims, which would otherwise drive premiums up.
Probationary Periods, Eligible Employees, and Classes
The probationary period (also called the waiting period) is the time a newly hired employee must work before becoming eligible to enroll. Under the ACA the maximum is 90 days; employers may set a shorter period or none at all, but never longer.
An eligible employee is normally defined as full-time — generally averaging 30 or more hours per week under the ACA. Part-time, seasonal, and temporary workers are frequently excluded. Employers may also create bona fide employee classes (for example, salaried vs. hourly, or management vs. staff) and offer different contributions or waiting periods to each class.
The critical limit: classifications must rest on legitimate employment criteria — job title, hours, length of service — and never on health status. Carving out a class based on who is sick would violate HIPAA nondiscrimination rules and defeat the risk-spreading purpose of group coverage.
Who Counts as a Group, and Who Is an Eligible Dependent
The sponsoring group must exist for a reason other than obtaining insurance — a bona fide employer, association, or labor union, not a group formed only to buy coverage. Common sponsor types include single-employer groups (most common), trade/professional associations, MEWAs (multiple employer welfare arrangements), and Taft-Hartley (multi-employer union) trusts.
Dependent Eligibility Under the ACA
| Dependent | Rule |
|---|---|
| Spouse | Legal spouse covered |
| Children | To age 26, regardless of marriage, student status, residency, or financial dependency |
| Disabled child | May continue past 26 with proof of disability |
Enrollment Timing Snapshot
- Initial enrollment — typically 30–31 days from eligibility.
- Open enrollment — annual window; changes usually effective Jan 1.
- Special enrollment (SEP) — triggered by qualifying life events (marriage, birth, adoption, loss of other coverage), generally 30 days; 60 days for Medicaid/CHIP changes.
Worked example — effective date: An employee hired June 3 under a plan with a "first of the month following 60 days" rule completes the waiting period around Aug 2, so coverage is effective Sept 1. The active-at-work rule means if she is out sick on Sept 1, the effective date may be delayed until she returns.
In a group health plan, which document is the actual legal contract, and who holds it?
Under the ACA, a dependent child must be allowed to remain on a parent's group plan until what age, and on what condition?
Conversion Rights and the Actively-at-Work Rule
Two group-eligibility rules round out the fundamentals. Most group health certificates include a conversion privilege: an employee leaving the group may convert to an individual policy without evidence of insurability, though at individual (higher) rates and often narrower benefits. Insurers protect the pool with the actively-at-work provision, which requires an employee to be performing normal duties on the effective date for coverage to begin.
| Group safeguard | What it prevents |
|---|---|
| Actively-at-work requirement | Enrolling already-disabled employees |
| Probationary period | Short-term churn enrollment |
| Minimum participation % | Healthy employees opting out |
| Annual/special open enrollment | Buying coverage only when sick |
Eligible Groups Beyond the Employer
The exam recognizes several eligible group types besides single employers: multiple-employer trusts (METs/MEWAs), trade and professional associations, labor unions (Taft-Hartley), and creditor groups (covering debtors' outstanding balances). The unifying rule is that the group must have formed for a purpose other than obtaining insurance — a requirement that blocks fictitious groups assembled solely to buy cheap coverage and thereby defeat the law of large numbers.