Why This Matters
In the US, health insurance is almost always required before a doctor will see you for non-emergency care. Unlike in most countries, there is no universal public system — most people get coverage through an employer, a spouse's employer, or by purchasing it themselves through a marketplace.
Key Terms First
Before comparing plan types, know these terms:
- Premium: Your monthly payment for the insurance plan, whether you use it or not
- Deductible: The amount you pay out-of-pocket each year before insurance starts covering services
- Co-pay: A fixed dollar amount you pay for each visit (e.g., $30 per primary care visit)
- Co-insurance: After meeting your deductible, the percentage you still pay (e.g., 20% of the bill)
- Out-of-pocket maximum: The most you will ever pay in a calendar year; after this, insurance covers 100%
- Network: The doctors and hospitals that have contracted with your insurance company at negotiated rates
HMO (Health Maintenance Organization)
How it works: You must choose a primary care physician (PCP) who manages your care. To see a specialist, you need a referral from your PCP. You can only use in-network providers (except true emergencies).
Pros: Lower monthly premiums, lower co-pays, less paperwork
Cons: Less flexibility, referral process can slow access to specialists, no coverage outside the network
Best for: People who want predictable low costs and are comfortable having a "gatekeeper" doctor coordinate their care.
PPO (Preferred Provider Organization)
How it works: You can see any doctor — in-network or out-of-network — without a referral. In-network providers cost less; out-of-network costs more but is still partially covered.
Pros: Maximum flexibility, no referrals needed, can see specialists directly
Cons: Higher monthly premiums, more complex billing
Best for: People who already have relationships with specific doctors, who travel frequently, or who want direct access to specialists.
HDHP (High-Deductible Health Plan)
How it works: A plan with lower monthly premiums but a higher deductible (at least $1,600 for an individual in 2025). You pay most routine costs out-of-pocket until you hit the deductible.
The HSA advantage: HDHPs can be paired with a Health Savings Account (HSA). You contribute pre-tax dollars to the HSA, which can be used tax-free for qualified medical expenses — and unused funds roll over year to year.
Pros: Lowest premiums, tax-advantaged savings via HSA
Cons: High out-of-pocket costs when you actually need care
Best for: Healthy people with few medical needs who want to reduce monthly costs and save for future healthcare expenses.
Open Enrollment
You can only sign up for or change plans during specific windows:
- Employer plans: Usually one window per year in the fall
- Federal marketplace (healthcare.gov): Open Enrollment is typically November 1 – January 15
- Special Enrollment: If you lose job-based coverage, have a baby, get married, etc., you get 60 days to enroll in a new plan
One Practical Tip
When comparing plans, don't just look at the premium. Estimate your likely annual medical costs and calculate your total spending (premium × 12 + expected out-of-pocket) for each plan. The cheapest premium is not always the cheapest plan.