DexCom, Inc.[2] is a company that develops, manufactures, produces, and distributes continuous glucose monitoring (CGM) systems for diabetes management.

It operates internationally with headquarters in San Diego, California; and has manufacturing facilities in Mesa, Arizona; Batu Kawan, Malaysia; and Athenry, Ireland.

Dexcom was founded in 1999 by Scott Glenn, John Burd, Lauren Otsuki, Ellen Preston and Bret Megargel.

[17] The Dexcom G7 was approved in December 2022 by the FDA for use as a standalone device and is the most accurate currently approved CGM in the U.S.[18] In a 2024 interview, Jake Leach, Dexcom's COO, stated his belief that while noninvasive glucose monitoring is a "beautiful concept" current technology doesn't match the accuracy of existing invasive CGMs.

[19] In October 2024, Time Magazine named Dexcom Stelo's over-the-counter glucose monitor as one of the best inventions of the year.