Health Insurance Open Enrollment Guide 2026: Everything You Need to Know

Updated March 28, 2026 • 11 min read • By National Healthcare Connect

Open enrollment is the one time each year when you can enroll in, change, or drop a health insurance plan. Outside of this window, you can only make changes if you experience a qualifying life event. The decisions you make during open enrollment affect your healthcare costs, access to doctors, and out-of-pocket exposure for the entire year — yet most people spend less than 20 minutes on them.

This guide gives you a structured approach to make the best choice for your situation.

Open Enrollment Periods by Insurance Type

Step 1: Review What You Used This Year

Before looking at new plans, understand your actual healthcare usage from the past 12 months:

• How many doctor visits, specialist visits, and ER visits did you have?
• What medications do you take regularly? How much did they cost?
• Did you hit your deductible? Your out-of-pocket maximum?
• Did any providers you use go out-of-network?
• What major health events or procedures do you anticipate next year?

This review tells you whether your current plan is the right fit, or whether you're overpaying for coverage you don't use — or underinsured for the care you actually need.

Step 2: Understand the Plan Types

The four main plan types vary in cost, flexibility, and how you access care:

• HMO (Health Maintenance Organization) — Lower premiums, requires a primary care physician, referrals needed for specialists, no out-of-network coverage except emergencies. Best for: healthy people who rarely use care, budget-conscious buyers who don't mind the referral process.
• PPO (Preferred Provider Organization) — Higher premiums, see any doctor without referrals, partial out-of-network coverage. Best for: people who see multiple specialists, want flexibility, or travel frequently.
• EPO (Exclusive Provider Organization) — Lower premiums than PPO, no referrals needed, but strictly in-network only (except emergencies). Best for: people who want PPO-style access but within a network.
• HDHP + HSA (High-Deductible Health Plan with Health Savings Account) — Lowest premiums, highest deductibles ($1,650+ individual, $3,300+ family in 2026), but HSA contributions are tax-deductible and funds roll over indefinitely. Best for: healthy adults who can afford to fund the HSA and won't be financially devastated by a high deductible.

Step 3: Understand the Numbers That Actually Matter

The monthly premium is just one cost. These are the numbers you need to compare:

• Deductible — What you pay before insurance starts covering most services. A $5,000 deductible means you're paying the first $5,000 of your healthcare costs out of pocket each year.
• Copays — Fixed amounts you pay per visit ($25 PCP copay, $50 specialist copay, etc.)
• Coinsurance — Your percentage share after the deductible. An 80/20 plan means insurance pays 80%, you pay 20% — until you hit the out-of-pocket maximum.
• Out-of-pocket maximum — The most you'll ever pay in a year ($9,200 individual limit in 2026 for ACA plans). After this, insurance covers 100% for the rest of the year. This is your catastrophic protection number.

To compare plans fairly, calculate your total annual cost: (Monthly premium × 12) + estimated out-of-pocket costs based on your expected usage. A plan with a lower premium but higher deductible may cost more overall if you use healthcare regularly.

Step 4: Check Your Doctors and Medications

The most common open enrollment mistake is choosing a plan based on premium alone, then discovering your doctors or medications aren't covered. Before enrolling:

• Verify all your current providers are in-network. Call each doctor's office and ask: "Do you accept [Plan Name] from [Insurer Name] for [year]?" Don't rely on the online directory alone — it's often outdated.
• Check your medications on each plan's formulary. Every insurer has a drug formulary (list of covered drugs) divided into tiers. A Tier 1 drug might cost $10/month; a Tier 3 or 4 drug might cost $100–$300/month even with insurance. Look up your medications on each plan before enrolling.
• Check specialty coverage. If you see oncologists, pain management specialists, or other specialty providers regularly, verify each is in-network for plans you're considering.

Step 5: Check for Subsidies (ACA Marketplace Buyers)

If you're buying through the ACA marketplace (Healthcare.gov), you may qualify for significant financial assistance:

• Premium tax credits reduce your monthly premium. You may qualify if your household income is between 100% and 400% of the federal poverty level (higher thresholds with current subsidy expansions).
• Cost-sharing reductions (CSRs) lower your deductible, copays, and out-of-pocket maximum if you earn between 100%–250% FPL and enroll in a Silver plan.

Use the Healthcare.gov estimator or call 1-800-318-2596 to see what you qualify for before choosing a plan. Many people eligible for subsidies never apply because they assume they don't qualify.

Special Enrollment Periods: When You Can Enroll Outside Open Enrollment

Missed open enrollment? You may still be able to enroll through a Special Enrollment Period (SEP) if you experience a qualifying life event:

• Loss of other health coverage (job loss, aging off parents' plan)
• Marriage or domestic partnership
• Divorce or legal separation
• Birth, adoption, or placement of a child
• Move to a new ZIP code or county (with new plan options)
• Gaining citizenship or immigration status
• Release from incarceration

You typically have 60 days from the qualifying event to enroll. Income-based eligibility for Medicaid and CHIP is open year-round.

Once you have coverage, the next step is finding providers who accept your plan. Browse the National Healthcare Connect directory to find in-network doctors near you.