The FDA classifies CPAP machines, complete masks, and humidifiers as Class II medical devices, meaning you must have a valid prescription to buy them.

You can typically buy replacement parts like tubing, individual mask cushions, and filters without a new prescription. 3. Buying Online vs. In-Store

The Ultimate Guide to Buying CPAP Supplies: Comfort, Compliance, and Savings

Every 6 months, as the fabric and plastic lose their structural integrity. 2. Prescription Requirements: What You Need

Before you shop, it is important to know what requires a doctor’s note.