Yes, Medicare Part B covers Prolia (denosumab) when a healthcare professional gives the injection in a doctor’s office, clinic, or other outpatient setting. After you meet the annual Part B deductible — $283 in 2026 — Medicare pays 80% of the approved amount for the drug and the injection, and you pay the remaining 20%.1Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles Coverage depends on a qualifying diagnosis and on the drug being administered by a licensed provider rather than self-injected at home.
Why Prolia Is a Part B Drug
Part B covers drugs that are “not usually self-administered by the patient” when a provider gives them as part of a medical service. The rule comes from the Social Security Act2Social Security Administration. Social Security Act Section 1861 and the corresponding federal regulation, which excludes self-administered drugs from Part B payment.3eCFR. 42 CFR 410.29 – Limitations on Drugs and Biologicals
Prolia fits that definition. You don’t fill it at a retail pharmacy; the doctor’s office buys the drug, stores it, and injects it during your visit. Because the whole process happens in a clinical setting, Prolia falls under Part B rather than Part D.
Who Qualifies for Coverage
Coverage requires more than being a Part B enrollee. Medicare pays only when the treatment is “reasonable and necessary” for your condition, and the claim must include ICD-10 diagnosis codes that support the drug’s use. The common qualifying diagnoses are postmenopausal osteoporosis in women at high fracture risk, osteoporosis in men at high fracture risk, and glucocorticoid-induced osteoporosis in patients on long-term steroids such as prednisone.
A DXA (dual-energy X-ray absorptiometry) scan is the standard way to document bone loss. A T-score of -2.5 or lower generally indicates osteoporosis, and a prior fragility fracture strengthens the case. Your physician must certify that Prolia is appropriate for your situation.
Part B also covers the bone density scan itself once every 23 months if you meet at least one qualifying condition, including being an estrogen-deficient woman at risk for osteoporosis, having X-ray findings suggestive of osteoporosis or vertebral fractures, taking or preparing to take steroid medications, having primary hyperparathyroidism, or being monitored on osteoporosis drug therapy.4Medicare. Bone Mass Measurements More frequent scans are allowed when medically necessary, such as when starting or changing treatment.5eCFR. 42 CFR 410.31 – Bone Mass Measurement: Conditions for Coverage and Frequency Standards That last category matters if you’re already on Prolia, because follow-up scans both track your response and support ongoing medical necessity.
What You’ll Pay
The math is simple once you meet the deductible. Medicare pays 80% of the approved amount for the drug and the administration fee, and you owe 20%.6eCFR. 42 CFR 410.152 – Amounts of Payment Prolia is given as one subcutaneous injection every six months, so this cost repeats twice a year.
Your bill can go up if your provider doesn’t accept assignment. Providers who accept assignment take the Medicare-approved amount as full payment and collect only your deductible and coinsurance.7eCFR. 42 CFR 424.55 – Payment to the Supplier Providers who don’t accept assignment can charge up to 115% of the Medicare fee schedule; that extra amount is called a Part B excess charge and comes out of your pocket unless another policy pays it.8eCFR. 42 CFR 414.48 – Limits on Actual Charges of Nonparticipating Suppliers Confirm assignment status before your appointment.
A short note on billing: Prolia is billed under HCPCS code J0897 (60 units for the standard 60 mg dose), with the injection billed separately under CPT 96372.9Centers for Medicare & Medicaid Services. Billing and Coding: Denosumab (Prolia, Xgeva) Keep copies of your DXA results and your doctor’s written order in case a coverage question comes up.
Lowering Your Share
A Medigap (Medicare Supplement) policy is the most common way to cover the 20% coinsurance. Every standardized Medigap plan pays at least some Part B coinsurance, and Plans F and G also pay Part B excess charges in full; other plans do not cover excess charges.10Medicare. Compare Medigap Plan Benefits
If your income is limited, a Medicare Savings Program can help. The Qualified Medicare Beneficiary (QMB) program pays your Part B premium, deductible, and all coinsurance, which can bring your out-of-pocket cost for Prolia to zero. The 2026 QMB income limits are $1,350 per month for an individual and $1,824 for a couple, with resource limits of $9,950 and $14,910.11Medicare. Medicare Savings Programs Two related programs, SLMB and QI, help with Part B premiums but don’t cover coinsurance. Apply through your state Medicaid office.
One boundary worth naming: the “Extra Help” low-income subsidy applies only to Part D. It won’t reduce what you pay for a Part B drug like Prolia.
Biosimilar versions of denosumab are also approved and covered by Part B under the same 80/20 rules.12U.S. Food and Drug Administration. Biosimilar Product Information Because Medicare bases payment on the drug’s average sales price, a biosimilar with a lower approved amount directly lowers your 20% share. Ask your doctor whether one is appropriate for you.
If You Have Medicare Advantage
Medicare Advantage (Part C) plans must cover everything Original Medicare covers, so Prolia is covered. Plans can, however, layer on requirements Original Medicare doesn’t use. Prior authorization is the most common one for denosumab: your doctor submits your diagnosis, DXA results, and treatment history to the plan for approval before administering the drug. Cost sharing follows your plan’s rules rather than the standard 80/20 split, and appeals go through your plan’s internal process. Check your plan’s evidence of coverage or call the plan to confirm what’s required and how far ahead the request should be submitted.
If Your Claim Is Denied
Denials for Prolia are usually fixable. The most common causes are a missing or mismatched diagnosis code, thin documentation of medical necessity, or a billing error such as the wrong number of units. Start by reading the denial notice for the stated reason and asking your provider’s office to correct any coding error and resubmit.
If a correction doesn’t resolve it, Original Medicare has a five-level appeals process.13Centers for Medicare & Medicaid Services. Medicare Parts A and B Appeals Process The first step, redetermination, is filed with your Medicare Administrative Contractor within 120 days of the denial notice using CMS Form 20027.14Medicare. Appeals Forms If that fails, reconsideration by a Qualified Independent Contractor comes next, followed by an Administrative Law Judge hearing, Medicare Appeals Council review, and finally federal district court. Most Prolia disputes end at the first or second level. Attach the supporting records — DXA results, the written order, treatment notes — with your appeal, and you can authorize your provider to file it for you using CMS Form 20031.