This mix-up is common, and understandably so. Between "Plan G," "Plan D," and "Part D," the naming alone trips people up. Many assume Medigap plans work like the old-style supplements that once bundled in drug coverage before 2006.
They don't anymore.
This article breaks down what Plan G actually pays for, what it excludes, how prescription drug coverage fits into the picture, and what your enrollment choices look like once you understand the difference.
Key Takeaways
- Plan G covers Original Medicare Part A and Part B cost-sharing only—not prescription drugs
- Pair Plan G with a standalone Part D plan for retail prescription coverage
- Plan G cannot be combined with Medicare Advantage; most Advantage plans already include Part D
- Compare each Part D formulary and pharmacy network to your medication list before you enroll
What Is Medigap Plan G — And What Does It Cover?
Medigap Plan G is private supplemental insurance that works alongside Original Medicare (Parts A and B). In most states, insurers sell standardized, lettered Medigap policies, meaning Plan G benefits are the same no matter which company sells the policy. Only the premium and customer service differ.
Plan G is designed to cover costs Original Medicare leaves unpaid. It doesn't replace Medicare, and it isn't Medicare Advantage. With Plan G, you keep access to any provider nationwide who accepts Medicare.
What Plan G Helps Pay For
| Covered Cost | Plan G Coverage |
|---|---|
| Part A hospital coinsurance (plus 365 extra hospital days) | Covered |
| Part A deductible | Covered |
| Part B coinsurance or copayment | Covered |
| Skilled nursing facility coinsurance | Covered |
| Part A hospice coinsurance/copayment | Covered |
| First three pints of blood | Covered |
| Part B excess charges | Covered |
| Foreign travel emergency (up to plan limits) | 80% covered |
What Plan G Doesn't Cover
Plan G still leaves key costs uncovered—and routine outpatient prescription drugs are one of them:
- Part B deductible ($283 in 2026)
- Routine outpatient prescription drugs
- Routine dental and vision care
- Hearing aids
- Long-term custodial care
- Private-duty nursing
The 2026 Part B deductible comes from Medicare's published cost figures. That deductible is why Plan G is called "nearly comprehensive" only for covered medical cost-sharing, not for every healthcare bill you may face.
Keep the labels straight: Medigap Plan D and Medicare Part D are different products. Plan D is a lettered Medigap supplement (rarely purchased new). Part D is the prescription drug program. Neither name is shorthand for the other.
Does Plan G Cover Prescription Drugs?
No. Plan G doesn't cover the medications you pick up at a retail pharmacy or receive through mail order. Medicare confirms that Medigap plans sold after 2005 exclude prescription drug coverage entirely. If you bought Plan G recently, drug benefits simply weren't part of the design.
There's One Notable Exception
Original Medicare Part B does cover a limited category of drugs, typically ones a clinician administers. That includes infusions during a covered outpatient visit and certain injectables given in a doctor's office. Plan G can help with the coinsurance on that Part B-covered service.
That's different from routine prescriptions. A blood pressure pill you take at home isn't the same category as a drug injected during a covered treatment. Only the second falls under Original Medicare's medical benefit — and only then does Plan G's cost-sharing help apply.
You Can't Add Drug Coverage to Plan G
There's no rider or add-on that turns Plan G into a prescription plan. Drug coverage has to come from somewhere else entirely:
- A standalone Part D plan: Works alongside Original Medicare and Plan G
- Creditable employer or union drug coverage: Keep it if you still have it and it qualifies
- Medicare Advantage with drug coverage: Replaces Original Medicare and Plan G rather than pairing with them
If you go the standalone Part D route, compare each plan on:
- Formulary coverage for your specific drugs
- Pharmacy network access
- Prior authorization or similar rules
- Premium, deductible, and copay costs
Formularies change year to year, so this isn't a one-time check. If you take several prescriptions or a high-cost specialty drug, match your real medication list to Part D formularies every Annual Enrollment Period to avoid an expensive surprise.
What Coverage Can You Use for Prescription Drugs Instead?
Once you understand Plan G's limits, the real decision becomes: which overall Medicare structure fits your prescriptions, your doctors, and your budget?
Original Medicare + Plan G + Standalone Part D
This path suits people who want:
- Broad access to any Medicare-accepting provider nationwide
- Predictable medical cost-sharing through Plan G
- A separate, dedicated drug plan they can shop independently each year
Medicare Advantage With Drug Coverage
This path suits people who prefer:
- One bundled plan covering medical and drug benefits together
- Comfort with provider networks and referral rules
- Potentially lower monthly premiums, in exchange for network restrictions
Here's an important rule: you generally cannot have Plan G and Medicare Advantage active at the same time. You'd need to disenroll from one before enrolling in the other, and that transition has its own timing rules.
Someone who drops Medigap to try Medicare Advantage isn't always guaranteed the right to buy it back later without medical underwriting. Federal protections exist in specific windows, but they're not unlimited.
A simple way to decide:
- Take several expensive medications and want to shop drug plans independently? Lean toward Plan G plus standalone Part D
- Comfortable with networks and want bundled simplicity with your doctors in-network? Medicare Advantage with drug coverage may fit better
- Travel frequently or split time between states? Plan G's nationwide access often matters more than a bundled discount
Neither option is universally better. It depends on your medications, your doctors, and how much complexity you're willing to manage.
Wareheim Medicare Advisors walks clients through that comparison: matching a real medication list and provider preferences against actual formularies and networks, then reviewing it again each year as costs and coverage shift. Reviews are at no cost in the states where agents are licensed: Florida, Georgia, North Carolina, Nevada, and South Carolina.
Plan G Costs and Enrollment Considerations
Budgeting for Plan G means tracking more than one number. You're generally looking at:
- The Plan G premium
- The Medicare Part B premium, which everyone on Original Medicare pays
- A Part D premium and its cost-sharing, if you enroll in a standalone drug plan
- The Part B deductible and other Plan G exclusions, paid out of pocket
Plan G premiums vary widely by insurer, state, your age, tobacco use, and the rating method the insurer uses: community-rated, issue-age-rated, or attained-age-rated. There's no single national price, so get local quotes rather than relying on a generic average.
Enrollment timing is critical. The federally protected Medigap Open Enrollment Period runs six months, starting the day you're both 65 and enrolled in Part B. Apply during that window, and insurers generally can't deny you or charge more based on health. Miss it, and future applications may involve medical underwriting.
Part D has its own separate enrollment clock, especially relevant if you're leaving employer coverage. Going 63 or more consecutive days without Part D or other creditable drug coverage can trigger a late-enrollment penalty added permanently to your premium.
When comparing costs, look at the full annual picture: premiums, deductibles, expected pharmacy visits, and copayments, not just the monthly price tag.
The Takeaway
- Plan G doesn't cover routine outpatient prescription drugs
- Pair Original Medicare and Plan G with a standalone Part D plan for prescriptions
- Compare medications, doctors, pharmacies, budget, and travel habits before you enroll
- Check enrollment timing; the wrong window can cost guaranteed-issue protections or trigger a penalty
- A licensed advisor familiar with your state's plans can walk through the comparison with you
Frequently Asked Questions
How much does Plan G cost per month?
Plan G premiums vary by insurer, state, age, tobacco use, rating method, and deductible option. There's no single national price. Check current quotes on Medicare.gov or with a licensed Medicare agent for accurate figures.
Does Plan G cover prescriptions?
No. Plan G doesn't cover routine outpatient prescription drugs picked up at a pharmacy. You'll generally need a standalone Part D plan alongside Original Medicare and Plan G for drug coverage.
What is the difference between Plan G and Plan D?
Plan G is a Medigap supplement covering Original Medicare cost-sharing. Medicare Part D is prescription drug coverage. They're different types of Medicare insurance entirely, despite the similar-sounding names.
Which is better, Medicare Plan C or Plan G?
It depends on when you became eligible. People newly eligible on or after January 1, 2020 generally can't buy Plan C, so Plan G is the practical option. If you were eligible earlier, Plan C covers the Part B deductible and Plan G does not.
What is the best Medicare plan that covers prescription drugs?
There's no universal answer. Compare standalone Part D plans against Medicare Advantage plans with drug coverage, checking your specific medication list, preferred pharmacies, doctors, and total annual costs for each.
What is not covered by Medicare Plan G?
Plan G excludes prescription drugs, the Part B deductible, and routine dental, vision, and hearing care, along with long-term custodial care. Always confirm specifics with your policy documents, since details can vary.
