Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement (Form S-8) pertaining to the 2005 Stock Incentive Plan of Genomic Health, Inc. of our reports dated March 12, 2009, with respect to the consolidated financial statements and schedule of Genomic Health, Inc. included in its Annual Report (Form 10-K) for the year ended December 31, 2008, and the effectiveness of internal control over financial reporting of Genomic Health, Inc. filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP
Palo Alto, California
November 9, 2009