Exhibit 24

                             POWER OF ATTORNEY FOR
                       SECTION 16 UNDER THE EXCHANGE ACT

        Know all by these presents that the undersigned, does hereby make,
constitute and appoint each of Jeffrey Doctoroff and Shawna Gasik, or any one of
them, as a true and lawful attorney-in fact of the undersigned with full powers
of substitution and revocation, for and in the name, place and stead of the
undersigned (in the undersigned's individual capacity), to execute and deliver
such forms that the undersigned may be required to file with the U.S. Securities
and Exchange Commission as a result of the undersigned's ownership of or
transactions in securities of MultiPlan Corporation (i) pursuant to Section
16(a) of the Securities Exchange Act of 1934, as amended, including without
limitation, statements on Form 3, Form 4 and Form 5 (including any amendments
thereto) and (ii) in connection with any applications for EDGAR access codes,
including without limitation the Form ID. The Power of Attorney shall remain in
full force and effect until the undersigned is no longer required to file Forms
3, 4 and 5 with regard to his or her ownership of or transactions in securities
of MultiPlan Corporation, unless earlier revoked in writing. The undersigned
acknowledges that Jeffery Doctoroff and Shawna Gasik are not assuming any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934, as amended.

        In witness whereof the undersigned has caused this Power of Attorney to
be executed for the uses set forth above.

By:     /s/ Jeffrey Doctoroff
        ------------------------
        Name: Jeffrey Doctoroff

Date: September 24, 2020