POWER OF ATTORNEY
	Know all by these presents, that the undersigned hereby constitutes and
appoints each of Reena R. Desai, and Vickie S. Reed or either of them signing
individually,
and with full power of substitution, the undersigned's true and lawful
attorney-in-fact to:

	(1) execute for and on behalf of the undersigned, in the undersigned's
capacity as an officer, director and/or more than 10% stockholder of Mirati
Therapeutics, Inc. (the "Company"), a Form ID, Forms 3, 4 and 5 and any other
documents necessary to facilitate the filing of reports in accordance with
Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder;

	(2) 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 ID or
Forms 3, 4 or 5, complete and execute any amendment or amendments thereto, and
file such forms with the SEC and any stock exchange or similar authority; and

	(3) take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, 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 attorney-in-fact 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 attorney- in-fact may approve in such
attorney-in-fact's discretion.

	The undersigned hereby grants to each attorney-in-fact full power and
authority to do and perform any and every act and thing 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 attorney-in-fact, or such
attorney-in-fact'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 attorneys-in-fact, 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 attorneys-in-fact. The undersigned hereby revokes all previous powers
of attorney granted with respect to the undersigned's holdings of and
transactions in securities issued by the Company.

	IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 20th day of September 2021.

/s/ David Meek
Signature

Name: David Meek