15.2 Guaranteed Issue, Rating Rules, and Marketplaces

Guaranteed Issue and Renewability

Before the ACA, individual health carriers used medical underwriting to decline applicants, exclude pre-existing conditions, or charge higher rates for health status. The ACA replaced that with guaranteed issue: in the individual and small-group markets, carriers must accept every applicant who applies during an open or special enrollment period, regardless of health history.

Closely related rules tested on the national exam:

• No pre-existing condition exclusions. A plan cannot deny or delay coverage for a condition that existed before the effective date — for any age group.
• Guaranteed renewability. The insurer must renew coverage at the policyholder's option, except for non-payment of premium, fraud, or the carrier leaving the market.
• No health-status rating. Premiums cannot vary based on health, gender, claims history, or occupation.

Guaranteed issue does not mean a carrier must sell outside an enrollment window. A carrier can lawfully decline an individual-market application submitted with no qualifying event during a closed period — the obligation to accept all comers operates within open and special enrollment periods. This is a frequent distractor: "guaranteed issue" is not "enroll anyone anytime." Guaranteed renewability, by contrast, runs continuously: once a policy is in force, the insured controls renewal subject only to the narrow exceptions above.

The Four Permitted Rating Factors

In the ACA individual and small-group markets, premiums may vary based on only four factors. Expect a question asking which factor is not allowed.

Trap: Gender, health status, claims experience, and occupation are prohibited rating factors. The 3:1 age band means a 64-year-old can be charged no more than three times the premium of a 21-year-old for the same plan. The 1.5:1 tobacco load means a tobacco user can be charged up to 50% more — but some states prohibit or reduce the tobacco surcharge.

Worked example: If the base premium for a 21-year-old non-tobacco user is $300/month, the maximum a carrier may charge a 64-year-old non-tobacco user for the same plan is 3 × $300 = $900/month. Layer a tobacco surcharge on the older adult and the cap becomes 1.5 × $900 = $1,350/month in states that permit the full load. Note the surcharge stacks multiplicatively against the age-adjusted figure, not the youngest-adult base.

Because the federal age curve is uniform, a carrier cannot invent its own steeper age slope; it must spread risk across the single-risk-pool community, which is why young, healthy enrollees effectively subsidize older enrollees under community rating.

The Health Insurance Marketplace (Exchange)

The ACA created the Health Insurance Marketplace (also called the Exchange) where individuals shop for QHPs and determine eligibility for subsidies. Federal and state-based exchanges exist; the federal platform is HealthCare.gov.

Key enrollment concepts:

• Open Enrollment Period (OEP): the annual window (commonly November 1 through mid-January) when anyone can enroll or change plans.
• Special Enrollment Period (SEP): a 60-day window triggered by a qualifying life event — loss of other coverage, marriage, birth or adoption, divorce affecting coverage, or a permanent move. Voluntarily dropping coverage or non-payment does not trigger an SEP.
• Subsidies (premium tax credits and cost-sharing reductions) are available only through the Marketplace, not for off-exchange plans.

SEP coverage typically begins prospectively (often the first of the month after plan selection), and the enrollee must select a plan within the 60-day window or lose the opportunity until the next OEP. Losing minimum essential coverage counts as a qualifying event, but losing coverage because you chose to stop paying premium does not. Marketplace plans are also where a producer's role is tested: an agent or broker must complete required Marketplace registration and training to enroll consumers in subsidized QHPs, and must disclose compensation as required.

Medical Loss Ratio and Other Carrier Rules

The ACA imposes a medical loss ratio (MLR) standard: carriers must spend a minimum percentage of premium dollars on medical claims and quality improvement rather than administration and profit.

If a carrier spends less than the required percentage on care, it must issue rebates to enrollees.

Worked example: A small-group carrier collects $10,000,000 in premium and the 80% MLR applies. It must spend at least $8,000,000 on claims and quality improvement. If it spends only $7,500,000, it falls $500,000 short of the threshold and must rebate that shortfall to policyholders. Carriers also must provide a plain-language Summary of Benefits and Coverage (SBC) so consumers can compare plans on a standardized form.

Open Enrollment, Special Enrollment, and the Individual Mandate

ACA individual coverage is sold during an annual open enrollment window; outside it, a person needs a qualifying life event (marriage, birth, loss of other coverage, move) to trigger a special enrollment period. This timing rule, combined with guaranteed issue, prevents people from waiting until sick to buy - the system's defense against adverse selection.

Plans, Networks, and Essential Rules

Worked trap: the federal individual mandate penalty was reduced to $0 beginning 2019, so there is no federal tax penalty for being uninsured today - but guaranteed issue and the enrollment-window rules remain. Some states impose their own mandates. Examiners test that guaranteed issue persists even though the federal penalty does not, and that tobacco use is the only health-related factor that may still surcharge a premium.