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Exhibit 23.02
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the reference to our firm under the caption "Experts" and to the use of our report dated February 17, 2006, except for Note 11, as to which the date is April 4, 2006, in the Registration Statement (Form S-1) and related Prospectus of Dexcom, Inc. expected to be filed on or about April 5, 2006.
/s/ ERNST & YOUNG LLP
San Diego, California
April 4, 2006
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM