Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
We consent to the reference to our firm under the caption “Experts” in this Registration Statement(Form S-3) and related Prospectus of Dexcom, Inc. for the registration of common stock, preferred stock, debt securities, warrants, subscription rights, and units and to the incorporation by reference therein of our reports dated February 27, 2018, with respect to the consolidated financial statements and schedule of Dexcom, Inc., and the effectiveness of internal control over financial reporting of Dexcom Inc., included in its Annual Report(Form 10-K) for the year ended December 31, 2017, filed with the Securities and Exchange Commission.
/s/ Ernst & Young LLP San Diego, CA |
| November 19, 2018 |
