Two broad paths to coverage
In the United States, most people use private insurance (through an employer or the individual market) or a public program (such as Medicare or Medicaid). Some have both during transition periods.
The right category depends on age, income, disability status, and employment. This guide compares how each path typically works, not every state-specific rule.
Private insurance at a glance
Private coverage is sold by insurance companies. Employer plans are the most common form. Individuals who do not have affordable job-based coverage can shop on HealthCare.gov or state marketplaces.
- Premiums paid by you, your employer, or both
- Plan choice varies by employer or marketplace region
- Networks and formularies differ significantly by carrier
- Subsidies on the marketplace depend on household income
- Open enrollment and special enrollment rules apply
Public programs at a glance
Public insurance is funded by federal and state governments. Eligibility is based on age, income, disability, or other criteria rather than an employer offering benefits.
- Medicare: primarily age 65+ or certain disabilities
- Medicaid: income-based coverage that varies by state
- CHIP: coverage for children in families that earn too much for Medicaid
- VA health care: for eligible veterans
- TRICARE: for active military, retirees, and families
Cost comparison factors
Public programs often have lower premiums but may have limited provider networks or separate drug coverage (as with Medicare Part D). Private employer plans may subsidize a large share of the premium, making them look inexpensive on paper.
When comparing options, add premiums, expected copays, and maximum out-of-pocket limits. A Medicaid plan with no premium can still involve transportation costs or longer wait times for specialists in some areas.
Can you have both or switch?
Some people qualify for Medicaid as a secondary payer or during gaps between jobs. Medicare beneficiaries may buy private Medigap or Medicare Advantage plans.
Life changes trigger new choices. Job loss may open marketplace enrollment. Turning 65 shifts most people toward Medicare. Review options whenever your income or household size changes.