HBO & Company Investors Included in Class Action Against MCKESSON HBOC, INC. and Its Officers and Directors.

NEW YORK--(BUSINESS WIRE)--June 21, 1999--

The following statement was issued today by the law firm of Kaplan, Kilsheimer & Fox LLP:

Kaplan, Kilsheimer & Fox LLP intends to file an additional Class Action suit against MCKESSON HBOC, INC. (NYSE:MCK) and certain of its officers and directors on behalf of all purchasers of HBO & Company ("HBOC") securities between April 14, 1998 and January 12, 1999. Kaplan, Kilsheimer & Fox LLP previously filed on behalf of all shareholders who purchased or otherwise acquired common stock of McKesson Corp. between October 18, 1998 and May 25, 1999, including all holders of HBO & Company stock on January 12, 1999 (without regard to the date of acquisition). If you fall into any of the above categories, you may, no later than sixty (60) days from April 28, 1999, move the court to serve as lead plaintiff of a class action seeking to recover monetary damages on behalf of all persons or entities who purchased during the class periods mentioned above. In order to serve as lead plaintiff, you must meet certain legal requirements.

To ensure that you will be included in a list of class members, or if you have any questions about this Notice, the action, or your rights, please contact:

Frederic S. Fox, Esq.

Janine Azriliant, Esq.

Donald R. Hall, Esq.

Kaplan, Kilsheimer & Fox LLP

[phone]

[phone]

e-mail address: [e-mail]

fax: [phone]

685 Third Avenue -- 26th Floor

New York, NY 10017