The US Food and Drug Administration is alerting patients, caregivers, and healthcare providers that Philips Respironics (Philips) has recalled certain masks used with bilevel positive airway pressure (also known as Bilevel PAP, BiPAP or BPAP) machines and continuous positive airway pressure (CPAP) machines due to a serious safety concern. More than 17 million masks are impacted by this recall. BiPAP and CPAP machines help people with obstructive sleep apnea, respiratory insufficiency, or respiratory failure — health conditions that cause pauses in breathing during sleep.