UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

The Securities Exchange Act of 1934

Date of report (Date of earliest event reported): October 27, 2005

PACIFICARE HEALTH SYSTEMS, INC.

(Exact Name of Registrant as Specified in Charter)

Delaware	001-31700	95-4591529
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

5995 Plaza Drive, Cypress, California 90630-5028

(Address of Principal Executive Offices, including Zip Code)

Registrant’s telephone number, including area code: (714) 952-1121

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Section 2 – Financial Information

Item 2.02 Results of Operations and Financial Condition.

On October 27, 2005, PacifiCare Health Systems, Inc. (the “Company”) issued a press release announcing its financial results for the quarter ended September 30, 2005. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein in its entirety by reference into this Item 2.02. The information included in this Item 2.02, including the press release attached as Exhibit 99.1, is “furnished” and not “filed” for purposes of Section 18 of the Securities and Exchange Act of 1934, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, except as shall be expressly set forth by specific reference in such a filing.

Section 7 – Regulation FD

Item 7.01 Regulation FD Disclosure.

The information included in Item 2.02 of this Form 8-K, including the press release attached as Exhibit 99.1, is incorporated by reference into this Item 7.01 in satisfaction of the public disclosure requirements of Regulation FD. This information is “furnished” and not “filed” for purposes of Section 18 of the Securities and Exchange Act of 1934, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, except as shall be expressly set forth by specific reference in such a filing.

Section 9 – Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits.

(c) Exhibits.

99.1 Press Release and accompanying information issued by the Company on October 27, 2005.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	PACIFICARE HEALTH SYSTEMS, INC.
Dated: October 27, 2005	By:	/s/ Peter A. Reynolds
		Peter A. Reynolds
		Senior Vice President and Corporate Controller
		(Principal Accounting Officer)

2.

INDEX TO EXHIBITS

99.1 Press Release and accompanying information issued by the Company on October 27, 2005.