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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 January 22, 2005, except for Note 10, as to which the date is March 23, 2005, in Amendment No. 4 to the Registration Statement (Form S-1 No. 333-122454) and related Prospectus of Dexcom, Inc.
/s/ ERNST & YOUNG LLP | |
San Diego, California March 23, 2005 |