Biosite Incorporated To Conduct Fourth Quarter And Year End Results Conference Call

Biosite Incorporated announces the following webcast:

Biosite Incorporated will announce 2005 fourth quarter results on Thursday, February 9, 2006 following the close of the market. The Company will also webcast a conference call on the same day (February 9) at 1:30 p.m. Pacific.

What: Biosite’s Fourth Quarter and Year End Results Conference Call When: Thursday, February 9, 2006 at 1:30 p.m. Pacific

Where: http://phx.corporate-ir.net/phoenix.zhtml?p=irol- eventDetails&c=69046&eventID=1197995

OR www.biosite.com How: Live over the Internet -- Simply log onto the web at the address above. Telephonic: United States/Canada/International: (617) 614-4929 Passcode: 54201653 You may dial *0 at any time for Operator assistance Contact: Simona Dixon Corporate and Investor Relations Biosite Incorporated (858) 805-2824 email: sdixon@biosite.com

If you are unable to participate during the live webcast, the call will be archived on the Biosite website www.biosite.com until March 2, 2006. The telephone replay number for U.S. callers is (888) 286-8010 and (617) 801-6888 for international callers, passcode: 13230156.

About Biosite Incorporated

Biosite Incorporated is a leading bio-medical company commercializing proteomics discoveries for the advancement of medical diagnosis. The Company’s products contribute to improvements in medical care by aiding physicians in the diagnosis of critical diseases and health conditions. Biosite’s Triage(R) rapid diagnostics are used in approximately 50 percent of U.S. hospitals and in over 50 international markets. Information on Biosite can be found at www.biosite.com.

(Minimum Requirements to listen to broadcast: The Windows Media Player software, downloadable free from: http://www.microsoft.com/windows/windowsmedia/EN/default.asp and at least a 28.8Kbps connection to the Internet.)

Biosite Incorporated

CONTACT: Nadine Padilla, VP, Corporate & Investor Relations,+1-858-805-2820, npadilla@biosite.com, or Corporate and Investor Relations,Simona Dixon, +1-858-805-2824, sdixon@biosite.com, both of BiositeIncorporated

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