FEHB vs Medicare: The Ultimate Guide for Federal Retirees

The Big Question: Do You Need Both FEHB and Medicare?

This is one of the most confusing decisions federal retirees face. Here's the short answer:

Understanding the Basics

What is FEHB?

The Federal Employees Health Benefits program offers comprehensive health insurance through private carriers (Blue Cross Blue Shield, GEHA, Kaiser, etc.). As a retiree, the government continues to pay ~72% of your premium.

What is Medicare?

• Part A (Hospital Insurance): FREE for most people. Covers inpatient hospital stays, skilled nursing facilities, hospice care.
• Part B (Medical Insurance): Costs $185/month in 2026 (higher incomes pay more). Covers doctor visits, outpatient care, preventive services, durable medical equipment.
• Part D (Prescription Drugs): Separate premium. NOT needed if you have FEHB (FEHB includes drug coverage).
• Medicare Advantage (Part C): Private plan alternative to Original Medicare. You generally CANNOT use this with FEHB.

Your Four Options at Age 65

Option 3: Medicare Part A + FEHB (No Part B)

This is the "sweet spot" for many federal retirees.

Advantages

• Save $185/month: That's $2,220/year or $22,200 over 10 years
• FEHB is Primary: Your FEHB plan pays first, just like when you were working
• Part A Covers Hospital Stays: Free hospital coverage complements your FEHB
• No Late Penalty: You can enroll in Part B later during Special Enrollment Period if needed

Disadvantages

• Gap Coverage: If you need extensive outpatient care, you'll pay FEHB cost-sharing without Medicare coordination
• Future Enrollment: You must enroll in Part B within 8 months of losing FEHB coverage (if you ever do) to avoid penalties

Option 4: Medicare A + B + FEHB (Triple Coverage)

This gives you the most comprehensive coverage but at a higher cost.

How Coordination Works

• If you're retired: FEHB is primary payer, Medicare is secondary
• Medicare pays first: For services it covers, Medicare pays its share
• FEHB picks up the rest: Your FEHB plan often covers Medicare's deductibles and coinsurance
• Result: Near-zero out-of-pocket costs for most services

Is It Worth $185/Month?

Decision Framework: Which Option Is Right for You?

Choose Medicare A + FEHB (Skip Part B) If:

• You're generally healthy with few doctor visits
• You want to minimize fixed monthly costs
• Your FEHB plan has good coverage and reasonable cost-sharing
• You're comfortable with some financial risk if major illness occurs

Choose Medicare A + B + FEHB If:

• You have chronic conditions requiring frequent specialist visits
• You take expensive medications (though FEHB drug coverage is usually excellent)
• You want near-zero out-of-pocket costs and peace of mind
• You can comfortably afford the extra $185/month
• You travel frequently and want Medicare's nationwide acceptance

Common Mistakes to Avoid

❌ Enrolling in Medicare Advantage (Part C)

You generally cannot use Medicare Advantage plans alongside FEHB. Stick with Original Medicare (Parts A & B) if you want coordination with FEHB.

❌ Forgetting to Enroll in Part A

Part A is FREE and provides valuable hospital coverage. There's no reason not to enroll at age 65.

❌ Dropping FEHB Prematurely

Once you drop FEHB in retirement, you generally cannot re-enroll. Think very carefully before giving up this valuable benefit.

❌ Missing the Part B Special Enrollment Period

If you skip Part B at 65 but later want it, you have an 8-month window after losing FEHB coverage. Miss this, and you'll face a permanent 10% penalty per year of delay.