TENET HEALTHCARE CORPORATION
                           OFFER FOR ALL OUTSTANDING
                     7 5/8% SERIES A SENIOR NOTES DUE 2008
             AND 8 1/8% SERIES A SENIOR SUBORDINATED NOTES DUE 2008
                                IN EXCHANGE FOR
                     7 5/8% SERIES B SENIOR NOTES DUE 2008
              8 1/8% SERIES B SENIOR SUBORDINATED NOTES DUE 2008,
                        WHICH HAVE BEEN REGISTERED UNDER
                          THE SECURITIES ACT OF 1933,
                                   AS AMENDED
 
To:BROKERS, DEALERS, COMMERCIAL BANKS,
   TRUST COMPANIES AND OTHER NOMINEES:
 
    Tenet Healthcare Corporation (the "Company") is offering, upon and subject
to the terms and conditions set forth in the prospectus dated September   , 1998
(the "Prospectus"), and the enclosed letter of transmittal (the "Letter of
Transmittal"), to exchange (the "Exchange Offer") its 7 5/8% Series B Senior
Notes due 2008 and its 8 1/8% Series B Senior Subordinated Notes due 2008, which
have been registered under the Securities Act of 1933, as amended, for its
outstanding 7 5/8% Senior Notes due 2008 and its 8 1/8% Senior Subordinated
Notes due 2008 (the "Old Notes"). The Exchange Offer is being made in order to
satisfy certain obligations of the Company contained in the registration rights
agreement in respect of the Old Notes, dated May 21, 1998, by and among the
Company and the initial purchasers referred to therein.
 
    We are requesting that you contact your clients for whom you hold Old Notes
regarding the Exchange Offer. For your information and for forwarding to your
clients for whom you hold Old Notes registered in your name or in the name of
your nominee, or who hold Old Notes registered in their own names, we are
enclosing the following documents:
 
    1.  Prospectus dated September   , 1998;
 
    2.  The Letter of Transmittal for your use and for the information of your
clients;
 
    3.  A Notice of Guaranteed Delivery to be used to accept the Exchange Offer
if certificates for Old Notes are not immediately available or time will not
permit all required documents to reach the Exchange Agent referred to below
prior to the Expiration Date (as defined below) or if the procedure for
book-entry transfer cannot be completed on a timely basis;
 
    4.  A form of letter which may be sent to your clients for whose account you
hold Old Notes registered in your name or the name of your nominee, with space
provided for obtaining such clients' instructions with regard to the Exchange
Offer;
 
    5.  Guidelines for Certification of Taxpayer Identification Number on
Substitute Form W-9; and
 
    6.  Return envelopes addressed to The Bank of New York, the Exchange Agent
for the Exchange Offer.
 
    YOUR PROMPT ACTION IS REQUESTED. THE EXCHANGE OFFER WILL EXPIRE AT 5:00
P.M., NEW YORK CITY TIME, ON OCTOBER   , 1998, UNLESS EXTENDED BY THE COMPANY
(THE "EXPIRATION DATE"). OLD NOTES TENDERED PURSUANT TO THE EXCHANGE OFFER MAY
BE WITHDRAWN AT ANY TIME BEFORE THE EXPIRATION DATE.
 
    To participate in the Exchange Offer, a duly executed and properly completed
Letter of Transmittal (or facsimile thereof or Agent's Message in lieu thereof),
with any required signature guarantees and any other required documents, should
be sent to the Exchange Agent and certificates representing the Old Notes, or a
timely Book-Entry confirmation of such Old Notes into the Exchange Agent's
account at The Depository Trust Company, should be delivered to the Exchange
Agent, all in accordance with the instructions set forth in the Letter of
Transmittal and the Prospectus.

    If a registered holder of Old Notes desires to tender, but such Old Notes
are not immediately available, or time will not permit such holder's Old Notes
or other required documents to reach the Exchange Agent before the Expiration
Date, or the procedure for book-entry transfer cannot be completed on a timely
basis, a tender may be effected by following the guaranteed delivery procedures
described in the Prospectus under "The Exchange Offer--Guaranteed Delivery
Procedures."
 
    The Company will, upon request, reimburse brokers, dealers, commercial banks
and trust companies for reasonable and necessary costs and expenses incurred by
them in forwarding the Prospectus and the related documents to the beneficial
owners of Old Notes held by them as nominee or in a fiduciary capacity. The
Company will pay or cause to be paid all stock transfer taxes applicable to the
exchange of Old Notes pursuant to the Exchange Offer, except as set forth in
Instruction 6 of the Letter of Transmittal.
 
    Any requests for additional copies of the enclosed materials, should be
directed to The Bank of New York, the Exchange Agent for the Exchange Offer, at
its address and telephone number set forth on the front of the Letter of
Transmittal.
 
                                          Very truly yours,
 
                                          TENET HEALTHCARE CORPORATION
 
    NOTHING HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU OR ANY
PERSON AS AN AGENT OF THE COMPANY OR THE EXCHANGE AGENT, OR AUTHORIZE YOU OR ANY
OTHER PERSON TO USE ANY DOCUMENT OR MAKE ANY STATEMENTS ON BEHALF OF EITHER OF
THEM WITH RESPECT TO THE EXCHANGE OFFER, EXCEPT FOR STATEMENTS EXPRESSLY MADE IN
THE PROSPECTUS OR THE LETTER OF TRANSMITTAL.
 
Enclosures
 
                                       2