Complete Medicare Guide 2026 — Everything You Need to Know
Medicare is the federal health insurance program for Americans age 65 and older, as well as certain younger people with disabilities. Understanding your Medicare options is one of the most important financial decisions you will make in retirement. This guide covers everything you need to know for 2026.
The Four Parts of Medicare
| Part | What It Covers | 2026 Cost |
|---|---|---|
| Part A — Hospital | Inpatient hospital care, skilled nursing, hospice, some home health | Free for most people; $1,736 deductible per hospital stay |
| Part B — Medical | Doctor visits, outpatient care, preventive services, medical equipment | $202.90/month premium + $283 annual deductible |
| Part C — Medicare Advantage | Alternative to Original Medicare through private insurers | Varies; often $0–$50/month but higher cost-sharing |
| Part D — Prescription Drugs | Prescription drug coverage through private insurers | Average ~$34.50/month; $2,100 OOP cap in 2026 |
Step 1 — Understand Your Initial Enrollment Period
Your Initial Enrollment Period (IEP) is the 7-month window during which you first become eligible to enroll in Medicare. It begins 3 months before the month you turn 65, includes your birthday month, and ends 3 months after. Enrolling in the first 3 months of your IEP ensures your coverage starts the month you turn 65. If you wait until your birthday month or after, coverage may be delayed by 1–3 months.
Step 2 — Enroll in Parts A and B
If you are already receiving Social Security benefits when you turn 65, you are automatically enrolled in Parts A and B and will receive your Medicare card in the mail. If you are not yet receiving Social Security, you must actively enroll through Social Security Administration at ssa.gov, by phone at 1-800-772-1213, or at your local Social Security office.
If you are still working and covered by employer insurance with 20 or more employees, you can delay Part B enrollment without penalty until you retire or lose employer coverage. You then have an 8-month Special Enrollment Period to enroll without penalty.
Step 3 — Choose Your Coverage Path
Once enrolled in Original Medicare (Parts A and B) you have two main paths for additional coverage:
- AOriginal Medicare + Medigap + Part D: Keep Original Medicare, add a Medigap supplement plan to cover gaps, and add a separate Part D drug plan. Maximum flexibility — see any doctor who accepts Medicare nationwide. Most predictable costs. Higher monthly premiums but lower and more predictable out-of-pocket costs.
- BMedicare Advantage (Part C): Replace Original Medicare with an all-in-one private plan. Often includes drug coverage. Usually lower monthly premiums but requires using a network, may need referrals, and can have higher costs when you need significant care. Coverage rules can change annually.
Step 4 — Add Part D Drug Coverage
Even if you currently take no medications, enrolling in a low-cost Part D plan when you first become eligible is strongly recommended. The late enrollment penalty for Part D is 1% of the national base premium ($38.99 in 2026) for every month you go without creditable coverage — and it is permanent. A basic Part D plan often costs $15–$25/month and protects you from this lifetime penalty.
Step 5 — Enroll in a Medigap Plan During Open Enrollment
If you choose the Original Medicare path, enroll in a Medigap supplement plan during your 6-month Medigap Open Enrollment Period — which begins the month you are both 65 or older AND enrolled in Part B. During this window insurers must sell you any plan at the standard rate regardless of health. Outside this window you may face medical underwriting and higher rates or denial.
In 2026 Plan G is the most popular Medigap plan for new enrollees because it covers almost everything except the $283 Part B annual deductible. Plan N is a strong alternative offering $25–$40/month savings in exchange for small copays.
Compare Plan G vs Plan N for your situation
Use our free calculator to see which plan costs less based on your health usage.
Use the Free Calculator →Annual Enrollment Period
Every year from October 15 through December 7 is Medicare's Annual Enrollment Period. During this window you can switch between Medicare Advantage plans, switch between Part D drug plans, or switch between Medicare Advantage and Original Medicare. Changes take effect January 1. This is your annual opportunity to review your coverage and make changes if your health needs or available plans have changed.