Does Medicare Cover Portable Oxygen Concentrators?

How Medicare Categorizes Oxygen Equipment

Medicare categorizes oxygen concentrators as durable medical equipment (DME) under Part B — meaning coverage falls under the same rules as other long-term medical devices like walkers, wheelchairs, or home infusion pumps.

Medicare does not cover the cost of purchasing an oxygen concentrator. Instead, coverage applies to rental costs only. You rent from a Medicare-approved DME supplier; Medicare pays its share of those monthly rental payments.1

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Medicare Eligibility Criteria for Oxygen Coverage

Medicare doesn't cover oxygen equipment simply because a doctor thinks it would help. You're eligible for oxygen delivery under Medicare when your healthcare provider says you aren't getting enough oxygen, your health might improve with oxygen therapy, and your arterial blood gas level falls within a certain qualifying range.

Specifically, meeting all of the following is typically required:

• A qualifying diagnosis (such as COPD, pulmonary fibrosis, or congestive heart failure)
• Blood oxygen saturation at or below 88% on room air, confirmed by clinical testing
• A physician's detailed written order specifying your required flow rate and delivery mode
• A Certificate of Medical Necessity (CMN) completed by your doctor
• Equipment must be from a Medicare-approved DME supplier

In practical terms, the approval process usually works like this:

1. Your doctor evaluates your symptoms, diagnosis, and oxygen saturation or arterial blood gas results.
2. Your doctor documents that oxygen therapy is medically necessary.
3. Your doctor writes an order that specifies your oxygen needs, such as flow rate and delivery method.
4. You work with a Medicare-approved DME supplier.
5. Medicare pays its approved share of the rental cost if all requirements are met.

Medicare may cover portable oxygen equipment specifically, but only when you meet oxygen therapy criteria through blood gas or oxygen saturation tests, demonstrate medical need, meet mobility requirements, and rent from a Medicare-approved supplier like Inogen.

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What Medicare Actually Pays: The Cost Breakdown

Medicare Part B requires a monthly premium and annual deductible. In 2026, the standard Part B monthly premium is $202.90, and the annual Part B deductible is $283.2

After you meet the deductible, you are generally responsible for 20 percent of the Medicare-approved rental amount for oxygen equipment, unless you have Medigap, Medicaid, or another form of secondary coverage that helps pay your share.3

In practice, typical monthly rental costs range from $150 to $400 depending on the model and service package, leaving the patient with a monthly 20% coinsurance payment — often between $30 and $80 per month — unless covered by a Medigap policy or Medicaid.

The 36-Month Rental Structure Explained

Medicare's oxygen coverage follows a structured timeline that many beneficiaries aren't initially aware of:

If you have Medicare Part B, you will rent your oxygen concentrator from a DME supplier for 36 months (three years). After that period, your supplier will continue to provide coverage for an additional 24 months (two years), as long as you still have a medical need for oxygen therapy.

As long as you have a medical need for oxygen, your supplier must continue to maintain the oxygen equipment in good working order and provide related supplies for that additional 24-month period, up to a total of 5 years.

One important note: the equipment belongs to the supplier throughout the entire 5-year period — Medicare doesn't transfer ownership to the patient at the end of the rental.

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The Portable Concentrator Catch: What Many People Don't Realize

Here's a nuance that catches many Medicare beneficiaries off guard: portable oxygen concentrators are covered by Medicare only if the DME supplier agrees to offer you a portable option.

Since portable concentrators are more expensive than stationary ones — and because Medicare's reimbursement rate to the supplier is the same either way — many suppliers will only offer stationary oxygen concentrators to Medicare beneficiaries.

Some oxygen companies like Inogen skip the supplier and negotiate directly with Medicare themselves, and as a result are more likely to rent you a portable machine. If portability is important to your daily life, working directly with a manufacturer that participates in Medicare — rather than relying on a general DME supplier — may get you better results.

Also important: if you travel by plane, your oxygen supplier is not required to give you an airline-approved portable oxygen concentrator, and Medicare won't pay for any oxygen related to air travel. Travel rentals are entirely separate from Medicare-covered therapy.

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Questions to Ask Before Choosing a Medicare Oxygen Supplier

Before you commit to a supplier, ask these questions:

• Do you provide portable oxygen concentrators, stationary concentrators, or both?
• Which specific models are available through Medicare rental?
• Will the equipment meet my prescribed oxygen flow needs during rest, exertion, and sleep?
• What accessories are included, such as batteries, tubing, carts, or carrying bags?
• What happens if the unit breaks or my oxygen needs change?
• Do you provide service if I travel or temporarily stay somewhere else?
• What will my estimated monthly coinsurance be after Medicare pays its share?

These questions can help you avoid one of the biggest frustrations with Medicare oxygen coverage: qualifying for oxygen therapy, but discovering that the supplier does not offer the portable model you expected.

Medicare Advantage and Other Options

Beneficiaries enrolled in Medicare Advantage plans may face restrictions regarding access to certain brands of portable oxygen concentrators, and coverage is not guaranteed — it depends on meeting all eligibility criteria set forth by the plan.

However, a Medicare Advantage plan may pay an even higher proportion of the rental cost, leaving you with a smaller monthly payment than Original Medicare.

If Medicare doesn't cover the specific device you need, additional options include Medicaid (for qualifying low-income beneficiaries), Veterans Affairs benefits, manufacturer assistance programs, and HSA/FSA funds for direct purchase.

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Medicare vs. Other Ways to Pay for an Oxygen Concentrator

Medicare can lower the cost of oxygen therapy, but it is not always the fastest or most flexible way to get the exact concentrator you want. Here’s how the main payment options compare.

For many older adults, the best path is to start with Medicare coverage and then ask whether a Medigap policy, Medicaid, Veterans Affairs benefits, or manufacturer financing can reduce the remaining cost. If you need a specific lightweight portable unit, paying out of pocket may give you more choice, but it also comes with the highest upfront cost.

The Bottom Line

Medicare can be a significant help in covering the cost of portable oxygen therapy — but the rules are more specific than many people expect, and the path to getting a portable rather than stationary device can require some advocacy.

Know your eligibility requirements before you start, work with your physician to document not just your diagnosis but your mobility needs, and consider working directly with a manufacturer like Inogen that engages with Medicare as a supplier. With the right preparation, Medicare's oxygen benefit can genuinely reduce your costs and support your independence.