Most insurance plans, including Medicare, will pay for a new CPAP machine once every five years. That five-year clock starts from the date you receive the equipment, and the machine must be worn out or no longer functioning adequately for a replacement to be approved. Between replacements, insurance covers accessories like masks, tubing, and filters on shorter schedules.
The Five-Year Standard
Five years is the widely used benchmark across Medicare and most private insurers for CPAP machine replacement. Medicare classifies CPAP devices as durable medical equipment (DME), and the expectation is that a machine has a reasonable useful life of five years. Once that period has passed, you can work with your supplier to get a new one covered.
Private insurers like Blue Cross Blue Shield, Aetna, UnitedHealthcare, and Cigna generally follow the same five-year guideline, though the exact terms vary by plan. Some plans may allow replacement slightly sooner if the device is no longer repairable, while others stick rigidly to the five-year mark. Checking your specific plan’s DME policy is the fastest way to confirm your timeline.
How Medicare’s Rental Model Works
Medicare doesn’t purchase your CPAP machine outright. Instead, it pays your supplier a monthly rental fee for 13 consecutive months, as long as you’ve been using the device without interruption. After those 13 months of payments, you own the machine. From that point forward, the supplier is responsible for repairs and maintenance through the end of the five-year period, but you won’t see additional rental charges on your statements.
This rent-to-own structure means your first machine is essentially on a trial basis during that initial period. If you stop using it or fail to meet compliance requirements, Medicare can stop payments, and you won’t take ownership.
Compliance Rules You Need to Meet
Insurance coverage for your CPAP isn’t automatic just because you have a sleep apnea diagnosis. You need to prove you’re actually using the machine, especially during the first 90 days. The standard set by the Centers for Medicare and Medicaid Services requires a minimum of 4 hours of use per night on at least 70% of nights within any consecutive 30-day period during those first three months. In practical terms, that means wearing your CPAP for at least 21 out of every 30 nights, for at least 4 hours each time.
Your CPAP machine tracks this data automatically, and your supplier or sleep provider will pull those numbers. If you fall short, your insurer can deny continued coverage, and you may be responsible for the cost of the equipment. After that initial 90-day window, your doctor also needs to document that your symptoms have improved and that you’re sticking with therapy. This reassessment typically happens around the 12-week mark.
These compliance rules also apply when you request a replacement machine after five years. Many insurers want to see recent usage data confirming you’re still actively using CPAP therapy before approving a new device.
Accessory Replacement Schedules
While the machine itself is on a five-year cycle, the parts that wear out faster are covered on shorter intervals. Most insurance plans follow a schedule similar to this:
- Full face mask or nasal mask: every 3 months
- Mask cushions and nasal pillows: every 1 to 2 months, depending on the type
- Tubing: every 3 months
- Disposable filters: every 2 weeks to 1 month
- Non-disposable filters: every 6 months
- Headgear and chin straps: every 6 months
- Humidifier water chamber: every 6 months
These are maximum replacement frequencies, meaning your plan will cover a new one up to that often. You don’t have to replace parts on this exact schedule, but keeping supplies fresh helps the machine work properly and keeps your therapy effective. Your DME supplier will often reach out proactively when you’re eligible for new supplies.
Getting a Replacement Before Five Years
There are circumstances where insurance may approve a new CPAP machine before the five-year mark. The most common scenario is a machine that has failed and can’t be repaired. If your supplier documents that the device is beyond repair, your insurer may authorize a replacement regardless of how long you’ve had it.
A change in your medical needs can also justify early replacement. If your sleep apnea has worsened significantly and your current machine can’t deliver the pressure range you now require, or if your doctor determines you need a bilevel (BiPAP) device instead of a standard CPAP, insurance may cover the switch. You’ll typically need updated sleep study results or clinical documentation supporting the change.
In either case, expect a prior authorization process. Your doctor or DME supplier will submit paperwork to your insurer explaining why the current machine no longer meets your needs. Approvals aren’t guaranteed, and some plans require an appeal if the initial request is denied.
What You Need for Initial Coverage
Before insurance covers any CPAP machine, whether it’s your first or a replacement, specific diagnostic criteria must be met. You need a qualifying sleep study, either conducted in a sleep lab or through an approved home sleep test. The results must show a certain severity of sleep apnea: at least 15 breathing disruptions per hour, or between 5 and 14 disruptions per hour combined with symptoms like excessive daytime sleepiness, mood changes, insomnia, high blood pressure, or heart disease.
Your doctor also needs to have conducted an in-person evaluation before ordering the sleep test. This isn’t just a formality. Insurers audit these claims, and missing documentation is one of the most common reasons for denied coverage.
Medicaid and State Variations
Medicaid covers CPAP machines in most states, but the replacement timelines and rules vary significantly depending on where you live. Some state Medicaid programs follow Medicare’s five-year standard closely, while others have their own policies around rental periods, compliance monitoring, and accessory schedules. If you’re on Medicaid, contact your state’s program directly or ask your DME supplier what your specific plan allows. The differences can be substantial enough that general guidelines won’t give you an accurate picture.
Tips for a Smooth Replacement Process
When your five-year window approaches, a few steps can prevent delays. First, make sure your usage data is up to date and shows consistent use. Many modern CPAP machines upload this data wirelessly, but it’s worth confirming your provider has access to recent numbers. Second, schedule a visit with your sleep doctor to get a current prescription. Even if your pressure settings haven’t changed, most insurers require a prescription written or renewed within the past year or two.
Keep records of any machine malfunctions, error codes, or performance issues. If your machine has been gradually losing effectiveness, documenting that pattern strengthens your case for replacement. Finally, work with a DME supplier who handles the prior authorization process regularly. They’ll know what documentation your specific insurer requires and can flag potential issues before they become denials.