EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of HCP, Inc., a Maryland corporation (the “Company”), hereby certifies, to his knowledge, that:

(i) the accompanying quarterly report on Form 10-Q of the Company for the period ended June 30, 2008 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: August 5, 2008	/s/ JAMES F. FLAHERTY III
	James F. Flaherty III
	Chairman and Chief Executive Officer
	(Principal Executive Officer)

A signed original of this written statement required by Section 906 has been provided to HCP, Inc. and will be retained by HCP, Inc. and furnished to the Securities and Exchange Commission or its staff upon request. Such certification will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except to the extent that the Company specifically incorporates it by reference.