Choosing between Medicare Advantage and Original Medicare is one of the biggest healthcare decisions you’ll make at 65. Here’s what you need to know to choose wisely.

Medicare Advantage vs. Original Medicare: Quick Comparison

Feature Original Medicare (A + B) Medicare Advantage (Part C)
Run by Federal government Private insurance companies
Monthly premium (2026) Part B: $185 + Medigap ($100-$300) Often $0-$50 (plus Part B)
Provider network Any doctor accepting Medicare Network restrictions (HMO/PPO)
Out-of-pocket maximum None Required (max $8,850 in 2026)
Prior authorization Rarely Often required
Dental/vision/hearing Not covered Often included
Drug coverage Separate Part D needed Usually included
Medigap compatible Yes No
Travel coverage Limited Varies by plan
Flexibility Maximum Limited

How Original Medicare Works

The Parts

Part What It Covers Cost (2026)
Part A (Hospital) Inpatient hospital, skilled nursing, hospice $0 premium (most people)*
Part B (Medical) Doctor visits, outpatient care, preventive $185/month
Part D (Drugs) Prescription drugs $15-$100/month
Medigap (Supplement) Fills coverage gaps $100-$300/month

*Part A is premium-free if you or spouse paid Medicare taxes for 10+ years.

Original Medicare Coverage Gaps

Without supplemental coverage, Original Medicare leaves you exposed:

Gap Your Responsibility
Part A deductible $1,676 per benefit period (2026)
Part B deductible $257/year (2026)
Part B coinsurance 20% of approved amount (no limit)
Hospital days 61-90 $419/day
Hospital days 91-150 $838/day
Beyond 150 days 100% of costs
Skilled nursing days 21-100 $209.50/day
Foreign travel emergency Not covered

Why Medigap matters: A single hospitalization without Medigap could cost $20,000+ out of pocket.

How Medicare Advantage Works

Medicare Advantage plans are sold by private insurers and must cover everything Original Medicare covers, plus often more.

Plan Types

Type Network Rules Out-of-Network Coverage
HMO Must use network providers None (except emergencies)
PPO Network preferred, out-of-network allowed Higher cost-share
PFFS Any provider accepting plan terms Varies
SNP Specialized for certain conditions Network-based

What’s Typically Included

Benefit Original Medicare Many MA Plans
Hospital (Part A)
Medical (Part B)
Prescription drugs Separate Part D Usually included
Dental (routine) ✓ ($1,000-$3,000 annually)
Vision (exams + glasses) ✓ ($100-$400 annually)
Hearing aids ✓ ($500-$3,000)
Fitness (SilverSneakers)
OTC allowance ✓ ($100-$200/quarter)
Transportation ✓ (limited trips)
Meal delivery Some plans

Cost Comparison

Monthly Premium Comparison

Coverage Type Monthly Cost Annual Cost
Original Medicare Only
Part B $185 $2,220
Part D (average) $40 $480
Total (no Medigap) $225 $2,700
Original Medicare + Medigap
Part B $185 $2,220
Part D $40 $480
Medigap Plan G (typical) $180 $2,160
Total (with Medigap) $405 $4,860
Medicare Advantage
Part B (still required) $185 $2,220
MA plan premium (many $0) $0-$50 $0-$600
Total $185-$235 $2,220-$2,820

Total Annual Cost Scenarios

Scenario 1: Healthy Year (Minimal Healthcare)

Cost Component Original + Medigap Medicare Advantage
Premiums $4,860 $2,220
Deductibles $257 (Part B) $0-$300
Copays/coinsurance $200 $100
Total cost $5,317 $2,320-$2,620
Winner MA saves $2,700+

Scenario 2: Moderate Year (Several Doctor Visits, Some Tests)

Cost Component Original + Medigap Medicare Advantage
Premiums $4,860 $2,220
Medical costs $500 $800 copays
Total cost $5,360 $3,020
Winner MA saves $2,340

Scenario 3: Major Medical Event (Surgery, Hospitalization)

Cost Component Original + Medigap G Medicare Advantage
Premiums $4,860 $2,220
Part B deductible $257 $0
Hospital costs $0 (Medigap covers) $2,000-$5,000
Surgery and follow-up $0 (Medigap covers) $1,500-$3,000
Total cost $5,117 $5,720-$10,220
Winner Original saves $600-$5,000

Scenario 4: Chronic Condition (Multiple Specialists, Ongoing Care)

Cost Component Original + Medigap Medicare Advantage
Premiums $4,860 $2,220
Part B deductible $257 $0
Specialist visits (12/year) $0 $600-$1,200
Procedures/tests $0 $1,500-$3,000
Prescriptions $800 $800 (similar)
Total cost $5,917 $4,620-$7,220
Winner Varies Depends on plan and utilization

The Hidden Costs of Medicare Advantage

Prior Authorization Delays

Procedure Typical Wait Time Risk
MRI/CT scan 1-5 days Delayed diagnosis
Surgery 5-14 days Delayed treatment
Specialist referral 3-7 days Delayed care
Home health 3-10 days Gap in care
Skilled nursing 5-15 days Discharged without proper care

Real risk: In 2024, Medicare Advantage plans denied 18% of prior authorization requests, many later overturned on appeal.

Network Limitations

Scenario Original Medicare Medicare Advantage
See top specialist Yes (if they accept Medicare) Only if in network
Go to Mayo Clinic Yes Usually only with referral/authorization
Snowbird (winter in FL) Same coverage Network may not cover out-of-area
Rural area care Any accepting provider Limited network providers
Second opinion Any doctor Network only (HMO) or higher cost (PPO)

Appeal and Denial Issues

Issue Original Medicare Medicare Advantage
Prior auth denials Rare 18%+ of requests
Appeals success rate N/A 75-82% of denials overturned
Time to appeal N/A Weeks to months
Patient burden Low High (must advocate for self)

When Original Medicare Is Better

Choose Original Medicare + Medigap If:

Situation Why Original Medicare Wins
Multiple chronic conditions No prior auth, see any specialist
See specialists regularly No network limits
Value provider choice Any Medicare-accepting doctor
Travel frequently Coverage works nationwide
Have complex health needs No denials or delays
Want predictable costs Medigap makes costs consistent
Live in rural area More provider options
Going to specialized hospitals Access to Mayo, Cleveland Clinic, etc.

Original Medicare Is Essential For:

Condition/Situation Why
Cancer (complex treatment) Access to best oncologists, clinical trials
Rare diseases See specialists anywhere
Transplant patients Top transplant centers
Extensive travel Consistent coverage
End-stage renal disease Full dialysis access

When Medicare Advantage Is Better

Choose Medicare Advantage If:

Situation Why MA Wins
Healthy with minimal healthcare needs Lower premiums, extra benefits
Need dental, vision, hearing Included in most plans
On tight budget $0 premium plans available
Most doctors in network anyway Network not limiting
Don’t travel much Local network is sufficient
Like all-in-one simplicity One card for everything
Want fitness benefits SilverSneakers included
Can handle prior authorizations Trade-off is acceptable

Medicare Advantage Sweet Spot:

  • Healthy 65-75 year old
  • Lives in metro area with good plan options
  • Primary doctor and hospital are in network
  • Doesn’t anticipate complex health needs soon
  • Value extras (dental, vision, gym)
  • Comfortable with managed care

The Medigap Factor

Medigap (Medicare Supplement) fills the gaps in Original Medicare:

Plan What It Covers Avg Monthly Premium (65 y/o)
Plan G All gaps except Part B deductible $150-$250
Plan N All gaps, some copays for ER/office $100-$180
Plan F* All gaps (100% coverage) $200-$350

*Plan F only available if Medicare-eligible before 2020.

Medigap Plan G Coverage

Coverage What G Pays
Part A deductible 100%
Hospital coinsurance (days 61-90) 100%
Hospital coinsurance (days 91-150) 100%
Skilled nursing coinsurance 100%
Part B coinsurance 100%
Part B excess charges 100%
Blood (first 3 pints) 100%
Foreign travel emergency 80%
Part B deductible ($257) $0 (you pay)

With Plan G, your total annual out-of-pocket is capped at $257 + premiums.

Critical Medigap Warning

Timing Medigap Guarantee
Within 6 months of Part B enrollment (age 65) Guaranteed issue (no health questions)
After 6-month window Can be denied or charged more for health conditions
Switching from MA after window Can be denied in most states

If you start with Medicare Advantage and later develop health problems, you may not be able to get Medigap at any price.

Only 4 states (CT, MA, ME, NY) guarantee Medigap access regardless of health.

Switching Between Plans

From Original Medicare to Medicare Advantage

When How
Annual Enrollment Period (Oct 15 - Dec 7) Enroll in any MA plan
Initial Enrollment (turning 65) Can choose either
Special Enrollment Period Qualifying life events

From Medicare Advantage to Original Medicare

When How Medigap Access
Annual Enrollment Period Drop MA, return to Original May be denied Medigap
MA Open Enrollment (Jan 1 - Mar 31) Switch to another MA or return to Original May be denied Medigap
Trial right (first year of MA) Can return to Original Guaranteed Medigap access

The trap: Many people choose MA for low premiums, then when they get sick and want to switch to Original Medicare + Medigap, they can’t get Medigap due to health issues.

State-by-State Medigap Protections

State Guaranteed Issue (Any Time)
Connecticut Yes
Massachusetts Yes
Maine Yes
New York Yes
All other states Only during initial 6-month window

If you live in one of these states, you can safely try Medicare Advantage and switch to Original + Medigap later if needed.

Decision Framework

Step 1: Assess Your Health Status

Health Level Recommended Path
Excellent, minimal care Consider MA (save money while healthy)
Good, occasional care Either works (compare costs)
Chronic conditions, multiple meds Original + Medigap (access matters)
Serious illness, specialists needed Original + Medigap (strongly)
End-stage disease Original + Medigap (critical)

Step 2: Check Network Adequacy

Question If Yes If No
Is your primary doctor in network? MA viable Lean Original
Is your hospital in network? MA viable Lean Original
Are specialists you need in network? MA viable Original better
Do you travel/snowbird? Original better MA may work

Step 3: Compare Total Costs

Calculate for both options:

  • Annual premiums
  • Expected out-of-pocket based on health
  • Value of extras (dental, vision, etc.)
  • Financial risk if major event occurs

Step 4: Consider the Future

Factor Original Medicare Medicare Advantage
Health may worsen Protected (can always get care) May regret network limits
Want to switch later Easy to add MA Hard to get Medigap
Moving to new state Coverage travels May need new plan
Financial protection Medigap limits exposure Out-of-pocket max helps, but higher

Quick Decision Guide

Choose Original Medicare + Medigap If:

  • ✓ You have or expect significant health issues
  • ✓ You want to see any doctor, any specialist
  • ✓ You travel frequently
  • ✓ You live in a state without guaranteed Medigap access
  • ✓ You can afford the higher premiums for peace of mind
  • ✓ You hate dealing with prior authorizations

Choose Medicare Advantage If:

  • ✓ You’re healthy with minimal healthcare needs
  • ✓ Your doctors are in network
  • ✓ You want dental, vision, and hearing coverage
  • ✓ You’re on a tight budget
  • ✓ You live in a state with guaranteed Medigap access (can switch later)
  • ✓ You’re comfortable with managed care

The Bottom Line

Original Medicare + Medigap is the “peace of mind” option:

  • Higher monthly cost ($400+/month)
  • Maximum flexibility and provider access
  • Predictable, capped out-of-pocket costs
  • Best for anyone with health concerns

Medicare Advantage is the “affordable gamble” option:

  • Lower monthly cost ($185-$235/month)
  • Extra benefits (dental, vision, hearing)
  • Network and prior auth restrictions
  • Best for healthy people in areas with good plans

The biggest mistake: Choosing Medicare Advantage for low premiums at 65, then being stuck without Medigap access when health declines.

Best strategy for most people:

  • If healthy at 65, consider trying Medicare Advantage for the first year (you have a trial right to return to Original Medicare with Medigap).
  • If you have any chronic conditions or anticipate complex care, start with Original Medicare + Medigap from day one.

Medicare rules and costs change annually. Verify current figures at Medicare.gov or with a licensed Medicare advisor.