SECURITIES AND EXCHANGE COMMISSION

                           Washington, D.C. 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): September 20, 2002


                             UNILAB CORPORATION

           (Exact name of registrant as specified in its charter)


     Delaware                     0-22758                  95-4415490
(State or other           (Commission File Number)       (I.R.S. Employer
jurisdiction of                                          Identification No.)
incorporation)


         18448 Oxnard Street
         Tarzana, California                                   91356
(Address of principal executive offices)                      (Zip Code)


                               (818) 996-7300
             Registrant's telephone number, including area code


                                    N/A
       (Former Name or Former Address, if Changed Since Last Report)



Item 5.  Other Events.

         Attached hereto and incorporated herein by reference as Exhibit
99.1 is a copy of a press release issued by Unilab Corporation on September
20, 2002.


Item 7.  Financial Statements and Exhibits

         (c) Exhibits

             (99.1)   Press Release, dated September 20, 2002.




                                 SIGNATURES

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, hereunto duly authorized.

                                       UNILAB CORPORATION
                                       (Registrant)


                                       By:  /s/ David W. Gee
                                            --------------------------
                                            Name:   David W. Gee
                                            Title:  Executive Vice President,
                                            Secretary and General Counsel

<PAGE>

Exhibit No.                  Description
-----------                  -----------

(99.1)        Press Release issued by Unilab Corporation on September 20, 2002.


<PAGE>


EXHIBIT (99.1)

For Immediate Release

SOURCE: Unilab Corporation

Unilab Announces Delay in Transaction with Quest Diagnostics

         TARZANA, Calif. -- (BUSINESS WIRE)--September 20, 2002 -- Unilab
Corporation (Nasdaq:ULAB) announced today that Unilab and Quest Diagnostics
Incorporated (NYSE: DGX) were engaged in discussions, including settlement
discussions, with United States Federal Trade Commission regarding the
proposed acquisition of Unilab by Quest Diagnostics. As a result, the
parties no longer expect the transaction to close in the third quarter of
2002, as previously announced.

         Unilab also announced that it was in discussions with Quest
Diagnostics regarding an extension of the termination date in the merger
agreement between the parties. Unless extended, either party is permitted
to terminate the merger agreement without payment of a break-up fee or
expense reimbursement if Quest Diagnostics' exchange offer for Unilab's
shares is not consummated on or before September 30, 2002.

Unilab Corporation is the largest provider of clinical laboratory testing
services in California through its primary testing facilities in Los
Angeles, San Jose and Sacramento and over 400 regional service and testing
facilities located throughout the state. Additional information is
available on the Company's website at www.unilab.com.

                               END OF FILING
[{"type": "8-K", "sequence": "1", "filename": "s383832.txt", "description": "FORM 8-K", "secsgml_size_bytes": 3716}]
{"company-data": {"conformed-name": "UNILAB CORP /DE/", "cik": "0000899714", "assigned-sic": "8071", "irs-number": "954415490", "state-of-incorporation": "DE", "fiscal-year-end": "0326"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-11839", "film-number": "02769009"}, "business-address": {"street1": "18448 OXNARD ST", "city": "TARZANA", "state": "CA", "zip": "91356", "phone": "8187586642"}, "mail-address": {"street1": "UNILAB CORP", "street2": "18448 OXNARD ST.", "city": "TARZANA", "state": "CA", "zip": "91356"}, "former-company": {"former-conformed-name": "METCAL INC", "date-changed": "19930401"}}
SECURITIES AND EXCHANGE COMMISSION

                           Washington, D.C. 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): September 20, 2002

                             UNILAB CORPORATION

           (Exact name of registrant as specified in its charter)

     Delaware                     0-22758                  95-4415490
(State or other           (Commission File Number)       (I.R.S. Employer
jurisdiction of                                          Identification No.)
incorporation)

         18448 Oxnard Street
         Tarzana, California                                   91356
(Address of principal executive offices)                      (Zip Code)

                               (818) 996-7300
             Registrant's telephone number, including area code

                                    N/A
       (Former Name or Former Address, if Changed Since Last Report)

Item 5.  Other Events.

         Attached hereto and incorporated herein by reference as Exhibit
99.1 is a copy of a press release issued by Unilab Corporation on September
20, 2002.

Item 7.  Financial Statements and Exhibits

         (c) Exhibits

             (99.1)   Press Release, dated September 20, 2002.

                                 SIGNATURES

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, hereunto duly authorized.

                                       UNILAB CORPORATION
                                       (Registrant)

                                       By:  /s/ David W. Gee
                                            --------------------------
                                            Name:   David W. Gee
                                            Title:  Executive Vice President,
                                            Secretary and General Counsel
Exhibit No.                  Description
-----------                  -----------

(99.1)        Press Release issued by Unilab Corporation on September 20, 2002.
EXHIBIT (99.1)

For Immediate Release

SOURCE: Unilab Corporation

Unilab Announces Delay in Transaction with Quest Diagnostics

         TARZANA, Calif. -- (BUSINESS WIRE)--September 20, 2002 -- Unilab
Corporation (Nasdaq:ULAB) announced today that Unilab and Quest Diagnostics
Incorporated (NYSE: DGX) were engaged in discussions, including settlement
discussions, with United States Federal Trade Commission regarding the
proposed acquisition of Unilab by Quest Diagnostics. As a result, the
parties no longer expect the transaction to close in the third quarter of
2002, as previously announced.

         Unilab also announced that it was in discussions with Quest
Diagnostics regarding an extension of the termination date in the merger
agreement between the parties. Unless extended, either party is permitted
to terminate the merger agreement without payment of a break-up fee or
expense reimbursement if Quest Diagnostics' exchange offer for Unilab's
shares is not consummated on or before September 30, 2002.

Unilab Corporation is the largest provider of clinical laboratory testing
services in California through its primary testing facilities in Los
Angeles, San Jose and Sacramento and over 400 regional service and testing
facilities located throughout the state. Additional information is
available on the Company's website at www.unilab.com.

                               END OF FILING