DexCom To Present at the Piper Jaffray 21st Annual Health Care Conference

DexCom, Inc. (NASDAQ:DXCM) today announced that Terrance Gregg, President and Chief Executive Officer, will present an update on DexCom at the Piper Jaffray 21st Annual Health Care Conference in New York on Tuesday, December 1, 2009, at 9:30 a.m. (EST). The presentation, which will occur live at the New York Palace Hotel in New York, will be concurrently webcast. The link to the webcast will be available on the DexCom, Inc. website at www.dexcom.com under the investor relations, events and webcast section, and will be archived for future reference.

About DexCom, Inc.

DexCom, Inc., headquartered in San Diego, California, is developing and marketing continuous glucose monitoring systems for ambulatory use by patients and by healthcare providers in the hospital.

Cautionary Statement Regarding Forward Looking Statements

DexCom is a medical device company with a limited operating history. Successful commercialization of the company’s products is subject to numerous risks and uncertainties, including a lack of acceptance in the marketplace by physicians and patients, the inability to manufacture products in commercial quantities at an acceptable cost, possible delays in the company’s development programs, the inability of patients to receive reimbursement from third-party payors and inadequate financial and other resources. Certain of these risks and uncertainties, in addition to other risks, are more fully described in the company’s annual report on Form 10-Q for the period ending September 30, 2009, as filed with the Securities and Exchange Commission on November 4, 2009.