POWER OF ATTORNEY
Know all by these presents, that the undersigned hereby constitutes and appoints
each of Kimberly J. Popovits, G. Bradley Cole and Jason W. Radford, or any of
them signing singly, and with full power of substitution, the undersigned's true
and lawful attorneyinfact to:
(1) 	prepare, execute in the undersigned's name and on the undersigned's behalf,
and submit to the U.S. Securities and Exchange Commission (the "SEC") a Form ID,
including amendments thereto, and any other documents necessary or appropriate
to obtain codes and passwords enabling the undersigned to make electronic
filings with the SEC of reports required by Section 16(a) of the Securities
Exchange Act of 1934 or any rule or regulation of the SEC;
(2) 	execute for and on behalf of the undersigned, in the undersigned's capacity
as an officer and/or director of Genomic Health, Inc., a Delaware corporation
(the "Company"), Forms 3, 4, and 5 in accordance with Section 16(a) of the
Securities Exchange Act of 1934 and the rules thereunder;
(3) 	do and perform any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete and execute any such Form 3, 4, or 5,
complete and execute any amendment or amendments thereto, and timely file such
form with the SEC and any stock exchange or similar authority; and
(4) 	take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorneyinfact, may be of benefit to, in
the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorneyinfact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorneyinfact may approve in such
attorneyinfact's discretion.
The undersigned hereby grants to each such attorneyinfact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorneyinfact, or such
attorneyinfact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted.  The undersigned acknowledges that the foregoing attorneysinfact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934.
This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneysinfact.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 21st day of June, 2016.
     /s/Geoffrey M. Parker
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Signature

         Geoffrey M. Parker
______________________________________________
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