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Private Coverage in the U.S. Healthcare System

  • This set of notes summarizes Lecture 5: Private Coverage by Daniel Polsky, focusing on how private coverage fits into the U.S. health care system, the ACA's role, the tax subsidy, and regulation.

Private Coverage: Major concepts

  • In the U.S., private health insurance is voluntary and remains the primary source of coverage for residents who are not elderly, poor, or disabled.
  • There are two major pathways to private insurance:
    • Group coverage (employer-sponsored health insurance, ESI): a policy or plan offered by a sponsoring group such as an employer, union, or trade association.
    • Direct coverage (non-group): purchasing directly from an insurer, often via an insurance agent or an online platform like Healthcare.gov; income-based premium assistance under the ACA is available for individual/non-group plans.
  • Private coverage coexists with public coverage; many individuals carry multiple coverages (that is, multiple coverage possible).

Private Coverage: Minor types

  • Tricare: coverage for uniformed service members and their families; comprehensive and similar in function to employer-based coverage.
  • Other private plans (not always comprehensive):
    • Multiple Employer Welfare Arrangements (MEWAs): used to offer less expensive benefits to groups of employers (e.g., “Association Health Plans”).
    • Church plans: entities affiliated with religious organizations; exempt from ERISA and some ACA reforms; may exclude contraception.
    • Student health plans: college/university-sponsored plans for students; may not meet ACA market rules; states may regulate them.

Private Coverage: Sources of private insurance (overall landscape)

  • Employer-Sponsored Insurance (ESI): often the largest source of private coverage; can be Fully Insured or Self-Insured.
  • Direct Purchase: individuals buying coverage from insurers (non-group).
  • Marketplace Plans: plans offered via ACA exchanges (federally facilitated or state-based marketplaces) that are ACA-compliant.
  • Other private plans: include non-ACA-compliant plans (off-marketplace) and special arrangements (e.g., MEWAs, church plans).
  • Key takeaway: the private insurance landscape is fragmented across multiple product types and regulatory frameworks.

Overview of the topic (structure of this lecture)

  • Sections cover: (A) Employment-based coverage, (B) Tax subsidies, (C) ACA Individual Marketplace basics and premium subsidies (deep dive), and (D) Regulation of private insurance (brief intro to the rest of the regulatory landscape).
  • ERISA = Employee Retirement Income Security Act of 1974; FPL = Federal Poverty Level.

Section A: Employer Sponsored Health Insurance (ESI)

Why the system is built around employer-sponsored insurance

  • Historical accident: Dallas, 1929 – 50 cents/month for teachers for two weeks of paid hospital care, which evolved into Blue Cross/Blue Shield.
  • 1943 IRS wage controls during WWII led to a rule that employer-based health insurance could be excluded from taxable income.
  • ESI grew rapidly: ~9% of the population covered in 1940 to ~63% in 1953.
  • Today, the system has created strong linkages between employment and insurance; this has practical implications for coverage stability and policy design.

Fully-Insured vs Self-Insured Firms

  • Fully insured: employer purchases traditional insurance from a state-licensed health insurer; example: firms with many employees use fully insured plans.
  • Self-insured (self-funded): employer pays for care directly with its own assets, often contracting with an insurer to administer claims but not transferring risk to an insurer.
  • In practice, more than half of privately insured people obtain coverage through self-insured employers; self-insured plans tend to be larger employers.

ERISA – Why it matters for private coverage

  • ERISA sets the legal framework for employer benefit plans (including health benefits), shaping private insurance substantially.
  • ERISA effects on private insurance:
    • Preemption of states from imposing certain employer-mandate laws (e.g., Maryland’s 2005 Fair Share Health Care Act) – ERISA can preempt state mandates.
    • Allows self-insured plans to avoid most state insurance regulations, including specific benefit mandates.
    • ERISA preemption supports employer flexibility and the prevalence of ESI by limiting state-level cost controls and coverage mandates.
  • Caveat: ERISA preemption reduces consumer protections at the state level, potentially limiting state power to manage costs or ensure benefits.

Are employers required to offer health benefits? (ACA background)

  • Employer Mandate (ACA): if an employer has more than 50 full-time equivalent employees, they must offer health benefits that:
    • Meet minimum essential benefits (MEBs)
    • Provide sufficient value
    • Are affordable for employees or face penalties
  • Penalties:
    • If not offering coverage: $2,000 penalty per full-time employee, after the first 30 employees.
    • If offering coverage that is not affordable or not offered to all eligible employees with subsidies: $3,750 penalty per full-time employee who obtains a subsidy.
  • ACA also requires employers to ensure certain coverage standards; affordability rules expanded to families (removal of the “family glitch”): subsidies consider family-level affordability, not just individual affordability.
  • Essential benefits standards govern what counts as adequate coverage (hospital, office visits, prescription drugs, etc.); limited-benefit plans do not count as compliant.

ACA’s broader impact on private plans

  • The ACA expanded access to dependent coverage up to age 26 for plans offered by employers.
  • Preventive services are provided with no cost sharing if they meet USPSTF A/B standards and CDC/HRSA guidelines for immunizations, child/adolescent preventive care, and women’s preventive services.
  • No lifetime or annual dollar limits on health care expenditures for plans that fall under ACA rules.

Additional private plan requirements under ACA

  • Dependents up to age 25 must be allowed on plan coverage.
  • Preventive services with no cost sharing, per USPSTF, CDC immunizations, HRSA-supported pediatric/adolescent care, and Women’s Preventive Services Initiative.
  • No lifetime or annual dollar limits.

Employer-Sponsored Health Insurance: Pros and Cons (Overview)

  • Pros:
    • Efficient risk pooling: spreads risk across a large group, helping to manage adverse selection.
    • Lower administrative costs due to scale and bargaining power.
    • Tax benefits (ESI excludes premiums from taxable income).
  • Cons:
    • Coverage is uneven, especially for low-wage workers or those at small firms.
    • Tied to employment: losing a job can abruptly disrupt coverage, reducing continuity.
    • Tax benefits are arguably inefficient and inequitable, contributing to horizontal and vertical inequities, and may incentivize over-generous plans (moral hazard).

Pro – Efficient risk pooling (more detail)

  • Risk pooling is effective when coverage is provided through groups (like workplaces) with a broad mix of health statuses.
  • High enrollment in employers’ plans reduces adverse selection and costs; large pools are easier to predict costs and set premiums.
  • In larger firms, administration costs per enrollee drop because fixed costs are spread over more people; administrative efficiency improves with firm size.
  • With employer contributions often covering a large share of the premium, workers bear a smaller share of the cost, which can stabilize demand for insurance.
  • As firm size grows, the variety of plan options typically narrows, reducing adverse selection among plan types.

Pro – Lower administrative costs (more detail)

  • Group purchasing power drives favorable insurer terms; enrollment data can be efficiently collected; premiums are paid with fewer disputes.

  • Lower per-capita administrative costs in larger groups.

  • Fewer administrative transactions reduce unpaid premiums and churn; simpler compliance with enrollment and premium collection.

  • Note: Administrative costs tend to decline as group size increases; typical pattern shows higher administrative efficiency in large firms compared to small firms.

Cons of ESI (detailed)

  • Insurance is tied to employment: losing or leaving a job can disrupt coverage and continuity.
  • Job-loss or job-change events can increase the need for insurance just as coverage is lost, challenging the notion of a stable safety net.
  • Tax benefits linked to employer-provided plans are inefficient and monetarily benefits tend to favor higher-income workers due to progressive tax rates and larger subsidies for more generous plans (vertical and horizontal inequities).
  • Uneven coverage by income and firm size: smaller firms tend to offer fewer plans and higher deductibles; low-wage workers have less access to robust coverage.
  • Fragmented regulation contributes to gaps in consumer protections and affordability.

Administrative costs and medical loss ratio (MLR)

  • Medical Loss Ratio (MLR) is defined as:MLR = rac{Benefits}{Premium}.
  • For clarity, another common expression is:$$MLR = rac{Benefits}{Benefits + Administrative ext{ }Costs} = rac{Benefits}{Premium}.
  • Regulatory standard: insurers must spend a minimum percentage of premiums on medical care and quality improvement; the thresholds are:
    • 80% for individual and small group markets.
    • 85% for large group markets.
  • If insurers fail to meet MLR thresholds, they must issue rebates to enrollees or plan sponsors.

Rates of self-insured (ESI) coverage by firm size and time

  • Self-insured coverage is more common in larger firms; data come from KFF-HRET Employer Health Benefits Surveys (noting year-over-year trends, including 2022 data).
  • Smaller firms are less likely to offer self-insured plans; larger firms more commonly offer self-insured or more generous benefits.

Smaller firms vs larger firms: plan generosity and deductibles

  • Smaller firms are more likely to offer plans with higher deductibles and/or less generous coverage.
  • Larger firms tend to offer more comprehensive coverage with lower deductibles.

Income-based disparities in ESI access (1999–2017 data)

  • There are uneven opportunities to obtain ESI across income levels; higher-income workers are more likely to have ESI through their jobs than lower-income workers.
  • Economic and job characteristics influence access to ESI and the distribution of plan generosity.

2023 snapshot: employer-based coverage by income

  • Rates of nonelderly employer-based coverage vary by income, reflecting both employment rates and employer plan offerings.
  • The data series combines opportunity variations (whether employed) with employment mix by income.
  • Source: calculations from the Current Population Survey (March Supplement).

Section B: The Tax Subsidy for Employment-Based Insurance

What is the tax subsidy?

  • The tax subsidy refers to the exclusion of employer-provided health insurance premiums from taxable income and payroll taxes, creating a tax expenditure.
  • On average, the subsidy amounts to about 35% of the premium, but ranges roughly from 15% to 50% depending on employer offer and income.
  • The subsidy is large and creates inequities and inefficiencies in the system (detailed below).

Inequities in the tax subsidy

  • Horizontal inequity: subsidies differ based on whether an employer offers coverage.
  • Vertical inequity: subsidies differ by income due to higher marginal tax rates for higher incomes, meaning higher-income workers receive larger subsidies.
  • The subsidy is inequitable because higher incomes typically face higher marginal tax rates, magnifying the subsidy.

Inefficiency and moral hazard

  • The subsidy tends to favor more generous plans, which, in turn, can lead to higher overall health care utilization and costs (moral hazard).
  • The subsidy varies with plan generosity; more generous plans receive larger subsidies, potentially encouraging overconsumption of care.

How the tax subsidy works (illustrative example)

  • Example: Suppose you earn $50,000 annually and have a 20% income tax rate; total premium is $5,000.
  • If employer does not offer coverage: Income tax = $0.20 × $50,000 = $10,000.
  • If employer pays $5,000 toward insurance: Salary is effectively $45,000 to keep total compensation at $50,000; income tax = $0.20 × $45,000 = $9,000.
  • Tax subsidy equals the reduction in taxes: $10,000 − $9,000 = $1,000.
  • This can be viewed as 20% × $5,000 = $1,000, illustrating how the tax exclusion translates a portion of the premium into a tax saving.

Federal tax expenditures and scale

  • The federal budget items show that tax expenditures related to employment-based health insurance are among the largest.
  • The combined effect across the federal and state tax systems underscores the magnitude of the subsidy and its impact on public finances.

Subsidy concentration by income (vertical inequality)

  • The concentration of the tax subsidy is higher among those with higher incomes because they face higher marginal tax rates and often have larger subsidies due to more generous plans.
  • Horizontal inequality also exists because higher-income individuals are more likely to receive the most generous coverage.

Evidence and visuals

  • Graphs illustrate that the subsidy rises with income and plan generosity; the highest subsidies are for high-income individuals in generous plans.
  • The marginal tax rate schedule (2022) underpins the vertical inequity: higher tax brackets produce larger subsidies when health benefits are tax-excluded.

Policy implications and moral hazard in ESI subsidies

  • The subsidy tends to promote more generous health plans, which can increase overall health spending and reduce price signals in the health market.
  • This created inefficiencies because incentives may encourage over-consumption of higher-value care and under-investment in lower-value care.

Section C: The ACA's Individual Marketplace

What is the ACA and the ACA Marketplace?

  • The Affordable Care Act (ACA), signed into law on March 23, 2010, made major changes to the U.S. health care system.
  • Before the ACA, high uninsurance rates existed due to cost and preexisting-condition exclusions.
  • ACA goals and actions:
    • Expanded Medicaid in participating states.
    • Required dependent coverage for children up to age 26 under employer plans.
    • Initiated hospital payment reform experiments and broader payment reform experiments.
    • Addressed problems in the individual market to make private plans more affordable and stable via the ACA Marketplace.
    • Implemented consumer protections to reduce adverse selection in the individual market.

ACA Marketplace basics

  • The ACA Marketplace (exchanges) is a place to shop for private health insurance in the individual market, designed to be more organized, competitive, and understandable for consumers.
  • Plans sold on the Marketplace must be ACA-compliant (they may also be sold off-marketplace but with different subsidies and protections).
  • Premium and cost-sharing subsidies are provided based on income to make coverage more affordable.
  • Each state has a Marketplace; some are state-operated, others are Federally Facilitated Marketplaces (healthcare.gov).
  • Non-compliant plans exist off-marketplace and typically do not