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Medicare Part D
Prescription Drug Coverage 2027
Is Prolia Covered by Medicare Part D in 2027? Part B vs Part D, Explained With Costs
Reviewed by Russell Noga, Licensed Medicare Insurance Broker (all 50 states) — Last updated November 1, 2026
Prolia can be covered by Medicare Part D in 2027 when it is filled at a pharmacy, but Medicare Part B usually pays when a doctor’s office buys and gives the injection. Which part pays changes your cost: Part B generally means 20% coinsurance, while Part D applies the plan’s deductible and coinsurance up to the $2,400 yearly cap.
2027 by the Numbers
Every 6 months
Prolia dosing schedule, given by a health care provider (FDA label)
20%
typical Part B coinsurance on a covered drug after the Part B deductible (Medicare.gov)
$1,325
2027 Part D cost for two Prolia doses at an assumed $1,600 each (our math)
Prolia (denosumab) is a shot given twice a year to treat osteoporosis in people at high risk of fractures. It is also used to build bone in men on hormone therapy for prostate cancer and women on aromatase inhibitors for breast cancer. Unlike most Part D drugs, it is meant to be given by a health care provider, which is why the Part B versus Part D question comes up so often.
The answer for 2027 depends on who buys the drug and where the shot happens. This page lays out each route, runs the numbers under 2027 rules, and flags a few things that differ between the two parts of Medicare. For the year’s Part D basics, start with the Medicare Part D plans 2027 hub.
Key Takeaways
- Clinic-bought, clinic-given Prolia is usually billed to Part B; a pharmacy-filled dose is billed to Part D.
- Part B also covers the injection at home through home health for women who meet strict fracture and self-injection criteria.
- Part D’s $2,400 cap and the Prescription Payment Plan apply only to the Part D route.
- The FDA has approved interchangeable denosumab biosimilars, starting with Jubbonti in 2024.
- Prolia is not on the negotiated price lists for 2026, 2027 or the drugs selected for 2028.
Which Part of Medicare Pays for Prolia
| How you get the shot | Usually billed to | What you typically owe |
|---|---|---|
| Doctor’s office buys the drug and gives the injection | Part B | 20% of the Medicare-approved amount after the Part B deductible |
| Home health nurse gives it, for women who qualify | Part B | 20% of the drug; the nurse visit itself costs nothing |
| Specialty pharmacy ships it, then a clinic gives it | Part D | Plan deductible and coinsurance or copay, up to the $2,400 cap |
| Medicare Advantage plan | Plan’s Part B or Part D side | Plan cost sharing, which varies by plan |
Billing depends on how the clinic orders the drug and the plan’s rules. Ask the office which route it uses before your appointment.
Rule of thumb: Medicare does not pay for the same dose under both parts. The route that buys the drug determines which benefit is billed.
The Part B Home Health Route
All of these must be true (Medicare.gov)
✔
You are a woman with osteoporosis
✔
You qualify for Medicare home health services
✔
A provider certifies a bone fracture related to postmenopausal osteoporosis
✔
A provider certifies you cannot give yourself the shot or learn to
✔
Family or caregivers are unable or unwilling to give it
Because every condition must be met, many people on Medicare get Prolia in a clinic instead. Men, and women without a qualifying fracture, generally need the office or pharmacy route.
Our Math: Part B Versus Part D for Two Doses in 2027
The figures below assume an illustrative price of $1,600 per Prolia dose, given in January and July. Actual prices differ by clinic, pharmacy and plan, and biosimilars may cost less. Part D uses the CMS 2027 standard benefit. The Part B line assumes the Part B deductible was already met by other care.
| Route | January dose | July dose | 2027 total for Prolia |
|---|---|---|---|
| Part B, Original Medicare only | $320 | $320 | $640 |
| Part B with a Medigap plan that pays coinsurance | $0 to small amount | $0 to small amount | Depends on the Medigap plan |
| Part D, standard 2027 benefit | $925 ($700 deductible + 25% of $900) | $400 (25% of $1,600) | $1,325 |
Our illustrative math. Office visit and administration charges are extra on every route. Part D figures exclude premiums.
A difference most comparisons skip: Original Medicare Part B has no yearly out-of-pocket limit, while Part D stops at $2,400. For a person with large Part D drug costs already, a pharmacy-filled Prolia dose may cost little or nothing once the cap is reached.
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Spreading a Part D Prolia Bill Across the Year
Prolia’s twice-a-year schedule creates two large pharmacy bills under Part D. The Medicare Prescription Payment Plan can turn them into monthly installments. It is a Part D feature only and does not apply to Part B drug bills.
$77.08
monthly installment January to June (our math)
$143.75
monthly installment July to December
$1,325
total paid, unchanged by the plan
These installments assume you join in January and use the two-dose example above. Sign-up rules are on the Medicare Prescription Payment Plan 2027 page.
Biosimilars and the Price Outlook
1
2024. FDA approves Jubbonti, the first biosimilar to Prolia, as interchangeable.
2
2025. More denosumab biosimilars receive FDA approval, and some begin reaching the market.
3
2026 and 2027. Clinics and plans may prefer a biosimilar, depending on the plan and area.
4
Negotiation lists. Denosumab is not among the drugs with negotiated prices for 2026 or 2027, or the 15 picked for 2028.
An interchangeable biosimilar can be substituted at the pharmacy where state law allows. If your clinic or plan switches products, ask whether your cost share changes. The negotiation program itself is covered on Medicare negotiated drug prices 2027.
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Medicare Advantage and Prolia
When the plan treats it as a Part B drug
✔
Medical-side copay or coinsurance, often up to 20%
✔
Counts toward the plan’s yearly in-network out-of-pocket maximum
✔
Prior authorization is common
When the plan treats it as a Part D drug
✔
Drug tier, deductible and coinsurance apply
✔
Counts toward the $2,400 Part D cap
✔
Specialty pharmacy may be required
Plans may also require step therapy, such as trying an oral osteoporosis drug first. Ask the plan which side covers Prolia before you schedule the shot.
Steps to Confirm Coverage Before Your Next Shot
Call or check these, in this order
✔
Ask the clinic whether it buys Prolia itself or uses a pharmacy-shipped dose
✔
If Part D, confirm Prolia or a biosimilar is on your 2027 formulary; not all plans cover every drug
✔
Find the tier and whether the deductible applies
✔
Ask about prior authorization and which specialty pharmacy to use
✔
Review whether Extra Help or a Medigap plan lowers your share
Tier and exception basics are in our Medicare Part D formulary 2027 guide, and income-based help is on Extra Help Medicare Part D 2027.
The Bottom Line
The Bottom Line
Prolia can be covered by Part D in 2027 when it comes from a pharmacy, but it is more often billed to Part B when a clinic supplies and gives the shot. In our two-dose example, Part B coinsurance is lower than the Part D standard benefit, though Part D has a yearly cap and payment plan that Part B lacks. Confirm with the clinic and your plan which route applies before each dose.
We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE (TTY 1-877-486-2048) to get information on all of your options.
Frequently Asked Questions
➤ Is Prolia a Part B or Part D drug?
It can be either. When a doctor’s office buys and gives Prolia, it is usually billed to Part B. When a pharmacy dispenses it, your Part D plan handles it.
➤ Who qualifies for Prolia at home under Part B?
Women with osteoporosis who qualify for home health, have a certified fracture linked to postmenopausal osteoporosis, and cannot self-inject, with no caregiver able or willing to help.
➤ Does a Medigap plan help with Prolia?
If Prolia is billed to Part B, many Medigap plans pay some or all of the 20% coinsurance. Medigap does not cover Part D drug costs.
➤ Does Prolia count toward the $2,400 Part D cap?
Only when it is covered under your Part D plan. Part B drug costs do not count toward the Part D limit.
➤ Is a Prolia biosimilar covered by Medicare?
Biosimilars such as Jubbonti can be covered under Part B or Part D, like Prolia. Plans may list or prefer certain products, depending on the plan.
➤ Does Prolia have a Medicare-negotiated price in 2027?
No. Denosumab is not on the 2026 or 2027 negotiated drug lists, or the list of drugs selected for 2028.
➤ Can I use the Prescription Payment Plan for Prolia?
Yes, if your Part D plan covers the dose. The payment plan does not apply to drugs billed under Part B.
➤ Will Medicare Advantage cover my Prolia shot?
Medicare Advantage plans cover Prolia under their medical or drug benefit. Cost sharing and approval rules vary, so ask the plan which side applies.
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