Can You Buy a CPAP Machine Without a Prescription?

The Short Answer

In the United States, CPAP machines are classified as Class II medical devices by the FDA. That means a prescription is required to buy a new one from an authorized retailer. But that's not the end of the story. There are legitimate ways to get a CPAP machine with minimal friction, and replacement supplies like masks, tubing, and filters never require a prescription at all.

Here's a practical breakdown of your options.

Why the FDA Requires a Prescription

CPAP machines deliver pressurized air to keep your airway open during sleep. The pressure settings need to match your specific diagnosis. Too little pressure and the therapy won't work. Too much and you'll experience discomfort, aerophagia (swallowing air), or central apneas.

A sleep study (polysomnography or a home sleep test) determines two things: whether you have sleep apnea, and how severe it is. Your prescribing physician then specifies the pressure range your machine should use. This is why the FDA treats CPAP as a prescription device. The therapy needs to be calibrated to your condition.

That said, most modern CPAP machines are auto-adjusting (APAP). They operate within a pressure range and adjust breath-by-breath based on what they detect. This makes the "exact pressure" argument less critical than it was a decade ago, but the FDA classification hasn't changed.

Buying a New CPAP Machine With a Prescription

If you have a prescription (or can get one easily), buying online is straightforward. Several reputable retailers specialize in CPAP equipment and make the prescription process simple.

How Online Retailers Handle Prescriptions

Most online CPAP retailers follow the same basic process:

1. Place your order. Select your machine and check out.
2. Upload your prescription. You can typically upload a photo or scan of your prescription, or provide your doctor's contact information so the retailer can request it directly.
3. Verification. The retailer confirms the prescription with your provider.
4. Shipping. Once verified, your machine ships.

The entire process usually takes 1 – 3 business days for prescription verification. Some retailers also offer telemedicine consultations where a licensed physician can evaluate you and write a prescription during a single video visit, often for under $100.

Getting a Prescription If You Don't Have One

If you suspect you have sleep apnea but haven't been diagnosed, here are your options:

• Your primary care doctor can order a home sleep test or refer you to a sleep specialist
• Home sleep test services offer mail-order testing kits that you use for one or two nights, then return for analysis. If the results indicate sleep apnea, the service's physician writes your prescription.
• Telemedicine sleep consultations provide remote evaluations, often bundled with home testing

A home sleep test typically costs $150 – $300 out of pocket, or may be covered by insurance with a referral.

The Used and Refurbished Market

Here's where things get more flexible. The FDA prescription requirement applies to the initial sale of a new device. Used and refurbished CPAP machines can often be purchased without a prescription through secondary markets, private sales, and some online platforms.

What to Know Before Buying Used

Pros:

• No prescription required in most cases
• Significantly lower cost (often 40 – 60% less than new)
• Good option if you need a backup or travel machine

Cons:

• No manufacturer warranty
• Unknown usage history and maintenance record
• Older models may lack current features (auto-adjusting pressure, Bluetooth connectivity)
• You still need to know your pressure settings to configure the machine properly

Important: Even if you buy a used machine, you should still have a sleep study and a physician-determined pressure setting. Running a CPAP at the wrong pressure isn't just ineffective. It can cause new problems.

Where to Find Used Machines

• Online marketplaces and auction sites
• CPAP user forums and community groups
• Medical equipment resellers that specialize in refurbished devices

If buying used, verify the model number, check for any FDA recalls, and make sure the device hasn't been affected by manufacturer safety notices (such as the Philips Respironics recall that impacted millions of devices starting in 2021).

Replacement Supplies: No Prescription Needed

This is the good news. CPAP supplies and accessories never require a prescription. You can buy all of the following freely:

• Masks and mask cushions (the part that actually seals against your face)
• Headgear and straps
• Tubing and hoses
• Filters (disposable and reusable)
• Water chambers for your humidifier
• SD cards for data recording
• CPAP cleaning supplies

These are consumable items that need regular replacement. Cushions wear out every 1 – 3 months, filters should be changed monthly, and tubing should be replaced every 3 – 6 months.

Browse CPAP replacement supplies on Amazon (opens in new tab) to find masks, cushions, filters, tubing, and more from major brands like ResMed and Fisher & Paykel.

Keeping your supplies fresh is one of the easiest ways to improve therapy. A worn-out cushion causes leaks, which causes pressure loss, which reduces therapy effectiveness. If your leak rate has been climbing, a new cushion is usually the first thing to try.

Insurance vs. Out-of-Pocket

Insurance Coverage

Most health insurance plans cover CPAP machines and supplies with a prescription and documented medical necessity. Here's what to expect:

• Deductible applies. You'll typically pay full price until you hit your annual deductible.
• Copay or coinsurance. After the deductible, you'll usually pay 20 – 40% of the cost.
• Rental vs. purchase. Many insurers rent the machine to you for 10 – 13 months before you own it. You must demonstrate compliance (at least 4 hours per night on 70% of nights within the first 90 days) or they may stop covering it.
• Supply replacement schedule. Insurance covers replacement supplies on a set schedule (for example, one mask every 3 months, two filters per month). You can often replace supplies more frequently out of pocket.

Out-of-Pocket Purchase

Buying without insurance has some real advantages:

• No compliance tracking. The machine is yours from day one. No rental period, no usage monitoring by your insurer.
• Choose any machine. Insurance may limit you to specific models. Paying out of pocket lets you pick the ResMed AirSense 11 (opens in new tab) or whatever model fits your needs.
• Faster process. No prior authorization, no waiting for insurance approval.
• Cost: A new auto-adjusting CPAP machine typically costs $500 – $900 out of pocket. That's comparable to what many people pay through insurance after deductibles and copays.

Travel CPAP Options

If you travel frequently, a dedicated travel CPAP can be a worthwhile investment. Travel machines are smaller, lighter, and often FAA-approved for in-flight use.

Travel CPAPs are subject to the same FDA prescription requirements as full-size machines when purchased new. However, the same used-market rules apply, and many travelers find them on secondary markets.

Popular travel CPAP features to look for:

• Weight under 1 lb for easy packing
• FAA compliance for use on airplanes
• Battery operation for camping or locations without reliable power
• Integrated humidification (some travel models skip this to save size)

Keep in mind that travel machines may not have SD card slots or the same data recording capabilities as your home machine. If tracking your therapy data matters to you (and it should), check the specifications before buying.

Always Start With a Diagnosis

This is the most important section of this article. While there are ways to obtain a CPAP machine without a traditional prescription process, you should always get a proper sleep study and diagnosis first.

Here's why:

1. Not all snoring is sleep apnea. Other conditions (upper airway resistance syndrome, positional snoring, nasal obstruction) require different treatments. Using CPAP when you don't have obstructive sleep apnea won't help and may cause unnecessary side effects.

2. Central sleep apnea requires different treatment. If your apneas are central (brain-signaling) rather than obstructive (airway collapse), a standard CPAP may not be appropriate. You might need a BiPAP or ASV machine instead.

3. Pressure settings matter. Even with an auto-adjusting machine, the minimum and maximum pressure range should be guided by your study results. A machine set to the wrong range won't treat you effectively.

4. Underlying conditions. A sleep study can reveal other issues: periodic limb movements, REM behavior disorder, or heart-related breathing patterns that need separate treatment.

5. Insurance and medical records. A documented diagnosis creates the medical record you'll need if you ever want insurance to cover your therapy, qualify for equipment upgrades, or demonstrate compliance for professional requirements (pilots, commercial drivers).

Bottom line: Getting a CPAP machine is getting easier. Getting the right diagnosis first is still essential.

Track Your Therapy Once You're Set Up

However you obtain your CPAP machine, understanding your nightly data is key to making therapy work. Your machine records detailed information every session: AHI, leak rates, pressure data, respiratory patterns, and more.

CPAP Clarity reads your SD card data and turns it into clear, actionable insights, all in your browser, with your health data never leaving your device. Whether you bought your machine through insurance or out of pocket, with a prescription or from the used market, your therapy data deserves the same level of attention.

Analyze your CPAP data for free →