Does Medicare Pay for Nebulizer Medications: Part B vs Part D

Medicare does pay for nebulizer medications, but the coverage splits between two parts of the program depending on how the drug is delivered. Part B covers FDA-approved inhalation solutions used at home through a nebulizer, along with the nebulizer machine itself, because both count as durable medical equipment and related drugs.¹ Part D covers self-administered inhalation drugs that don’t go through a nebulizer, mainly metered-dose and dry powder inhalers. Under Part B you generally pay 20% of the Medicare-approved amount after meeting the annual deductible of $283 in 2026.²

What Part B Covers

A nebulizer qualifies as durable medical equipment because it’s durable, has a medical purpose, is appropriate for home use, and is expected to last at least three years. When your doctor prescribes both the machine and the inhalation solution for home use and documents that the treatment is medically necessary, Part B pays for both.¹ The prescribing doctor has to be enrolled in Medicare, and the written order must identify the diagnosis, the specific medication, and that the treatment is for home use.

Two limits matter here. First, only FDA-approved inhalation drug formulations are covered. Compounded solutions, where a pharmacy mixes a custom preparation, are not paid for under Part B.³ Second, if none of the drugs you use with the nebulizer are covered FDA-approved formulations, Medicare may also deny the machine and accessories as not reasonable and necessary.

Which Nebulizer Medications Are Typically Covered

Part B doesn’t publish a formulary the way Part D plans do. Coverage turns on whether the drug is FDA-approved for nebulizer delivery and whether its use is medically reasonable for your condition. The inhalation solutions most commonly billed through Part B include:

Albuterol, a short-acting bronchodilator used for quick relief of asthma and COPD symptoms.
Ipratropium, an anticholinergic bronchodilator often prescribed for COPD.
Albuterol-ipratropium combination, a premixed solution for broader airway relief.
Budesonide, an inhaled corticosteroid used to control inflammation in asthma and COPD.
Levalbuterol, a more targeted version of albuterol sometimes used when standard albuterol causes side effects.
Revefenacin, a long-acting muscarinic antagonist for COPD maintenance.
Cromolyn sodium, a mast cell stabilizer used for asthma prevention.
Dornase alfa, an enzyme used in cystic fibrosis treatment to thin mucus.
Acetylcysteine, a mucolytic that helps break up thick mucus.

Each has a specific HCPCS billing code, and each must be an FDA-approved inhalation solution to qualify for Part B payment.³ A few drugs that are FDA-approved for nebulizer use are still excluded from the Part B DME benefit because the nebulizer device they require doesn’t meet Medicare’s durability standards. Aztreonam lysine and amikacin liposome both fall into that category.

When the Drug Falls Under Part D Instead

If you use an inhaler rather than a nebulizer for the same medication, coverage usually shifts to Part D. Metered-dose inhalers, dry powder inhalers, and similar handheld devices generally fall under a Part D plan’s drug benefit rather than the Part B DME benefit.

Every Part D plan keeps its own formulary, and formularies vary. Your plan may require prior authorization before covering certain inhalation drugs, or use step therapy, meaning you have to try a lower-cost option first before the plan will cover a more expensive one. If the drug you need isn’t on the formulary at all, you or your prescriber can request a formulary exception. The prescriber submits a statement, verbally or in writing, explaining why the non-formulary drug is necessary because the alternatives would be less effective or would cause adverse effects.⁴ Plans must respond within 72 hours for standard requests, or 24 hours for expedited ones when waiting could seriously harm your health.

Medicare Advantage plans have to cover everything Original Medicare covers, so a nebulizer and its solutions remain covered under Part B rules inside a Medicare Advantage plan.⁵ Most Medicare Advantage plans also fold in drug coverage equivalent to Part D. The catches: your plan may require an in-network DME supplier, may impose different prior authorization rules, and may set different cost-sharing than the standard 20%.

What You’ll Pay

Part B Costs

For the nebulizer and its inhalation solutions, you pay 20% of the Medicare-approved amount after meeting the annual Part B deductible of $283 in 2026.² Medicare pays the other 80%.⁶ The 20% applies to both the equipment and the medication. If your supplier accepts assignment, they agree to charge only the Medicare-approved amount, so your coinsurance comes off that figure rather than a higher retail price.

Medicare treats nebulizers as capped rental items. You rent the machine monthly, and you owe 20% of each month’s rental fee. After 13 months of continuous rental, ownership transfers to you at no additional cost.⁷ Once you own the equipment, rental payments stop, but Medicare keeps covering the medications and replacement supplies like tubing and mouthpieces.

Part D Costs

For inhalation drugs covered under Part D, what you pay depends on the coverage stage. Part D plans can charge a deductible of up to $615 in 2026, during which you pay the full drug cost.⁸ Some plans waive the deductible or waive it for certain drug tiers. After the deductible, you pay 25% coinsurance on both generics and brand-name drugs in the initial coverage stage. Once your out-of-pocket spending hits $2,100 in 2026, you enter catastrophic coverage and pay nothing for covered Part D drugs for the rest of the year.⁹ The old coverage gap no longer exists; the Inflation Reduction Act replaced it with the hard annual cap, set at $2,100 for 2026.

What Your Prescription and Records Need to Show

Payment for a nebulizer takes more than a standard prescription. Federal rules require a face-to-face encounter with a physician, nurse practitioner, physician assistant, or clinical nurse specialist within the six months before the written order is issued.¹⁰ That visit can happen by telehealth. The record must show you were evaluated or treated for a condition that supports needing a nebulizer.

The written order itself has to identify the item, the diagnosis, and enough detail for the supplier to fill it, including the medication name, dosage, frequency, and duration of treatment. If a nurse practitioner, physician assistant, or clinical nurse specialist writes the order, a physician has to co-sign the part of the record documenting the face-to-face encounter. Missing any of these pieces is one of the most common reasons nebulizer claims get denied, so confirm with your doctor’s office that the paperwork is complete before you pick up the equipment.

Using a Medicare-Approved Supplier

Once you have a valid prescription, you need a DME supplier enrolled in Medicare. Not every pharmacy or medical supply company qualifies. Under Original Medicare, look for a supplier that accepts assignment, so they bill Medicare directly and charge you only the coinsurance plus any unmet deductible. You can search for enrolled suppliers through the Supplier Directory on Medicare.gov or by calling 1-800-MEDICARE (1-800-633-4227).¹¹ With a Medicare Advantage plan, use one of the plan’s network suppliers; out-of-network could mean higher costs or no coverage at all. Before the first delivery, ask the supplier for your expected cost-sharing amount in writing, which helps head off surprise bills if something isn’t covered or needs prior authorization.

If Medicare Denies Coverage

You have the right to appeal a denial, and you have to start at the first level and work up if needed. Redetermination is the first step: you ask the Medicare contractor that denied the claim to review it again, and you have 120 days from receiving the denial notice to file. If that fails, a Qualified Independent Contractor takes a fresh look at reconsideration. Above that sit a hearing before an Administrative Law Judge, review by the Medicare Appeals Council, and finally federal district court, which requires the amount in controversy to reach $1,960 in 2026.

Most nebulizer disputes resolve at the first or second level.¹² The usual reasons for denials are incomplete documentation from the prescriber, a missing face-to-face encounter, or a supplier that isn’t enrolled in Medicare. Check the reason code on the denial notice first. Often the fix is your doctor’s office resubmitting the paperwork with the missing information, which may clear things up without a formal appeal.

Extra Help for Part D Costs

If your income and resources are limited, the Extra Help program (also called the Low-Income Subsidy) can sharply cut what you pay for Part D drugs, including inhalers used instead of nebulizer solutions. In 2026, beneficiaries with full Extra Help pay no deductible and copayments ranging from $0 to $12.65 per prescription depending on income level and whether the drug is generic or brand-name.¹³ After reaching the $2,100 out-of-pocket cap, all Part D beneficiaries, Extra Help recipients included, pay $0 for covered drugs the rest of the year.

Eligibility in 2026 requires income at or below 150% of the federal poverty level and countable resources no greater than $16,590 for a single person or $33,100 for a married couple. Resources include bank accounts, stocks, and bonds, but not your primary home or personal belongings.¹³ You can apply through Social Security online, by phone, or at a local Social Security office. Extra Help applies only to Part D costs, not to the 20% coinsurance on Part B nebulizer medications, though separate Medicare Savings Programs may help with Part B costs for qualifying individuals.

1
Medicare.gov. Nebulizers and Nebulizer Medications
2
Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles
3
Centers for Medicare & Medicaid Services. Nebulizers – Policy Article
4
Centers for Medicare & Medicaid Services. Exceptions
5
eCFR. 42 CFR 422.100 – General Requirements
6
Medicare.gov. Medicare Coverage of Durable Medical Equipment and Other Devices
7
eCFR. 42 CFR 414.229 – Capped Rental Items
8
Centers for Medicare & Medicaid Services. Final CY 2026 Part D Redesign Program Instructions
9
Medicare.gov. How Much Does Medicare Drug Coverage Cost
10
eCFR. 42 CFR 410.38 – Durable Medical Equipment, Prosthetics, Orthotics and Supplies (DMEPOS) Scope and Conditions
11
Medicare.gov. Durable Medical Equipment Cost Compare
12
Medicare.gov. Filing an Appeal
13
Centers for Medicare & Medicaid Services. Calendar Year (CY) 2026 Resource and Cost-Sharing Limits