Do I need a prescription for Lingo? November 18, 2025 23:23 Updated No, you do not need a prescription to purchase Lingo. Lingo is available on our website as an over-the-counter glucose biosensor, or OTC continuous glucose monitor, and does not require a prescription to purchase. Related articles Who can buy an OTC CGM? What glucose range does Lingo show? How does a CGM work? How many biosensors come with my initial purchase? Is Lingo available on Android™?