JOHN A. DEFORD
LIMITED POWER OF ATTORNEY FOR
SECTION 16 REPORTING OBLIGATIONS

I hereby make, constitute and appoint each of Joan B. Stafslien and Nathaniel B.
Sisitsky, each acting individually, as the undersigned's true and lawful
attorney-in-fact, with full power and authority as hereinafter described on
behalf of and in the name, place and stead of the undersigned to:

(1)	prepare, execute, acknowledge, deliver and file Forms 3, 4, and 5 (including
any amendments thereto) with respect to the securities of NuVasive, Inc., a
Delaware corporation (the "Company"), with the United States Securities and
Exchange Commission (the "SEC"), any national securities exchanges and the
Company, as considered necessary or advisable under Section 16(a) of the United
States Securities Exchange Act of 1934 and the rules and regulations promulgated
thereunder, as amended from time to time (the "Exchange Act");

(2)	prepare and execute in the undersigned's name and on the undersigned's
behalf, and to submit to the SEC a Form ID, including amendments thereto, and
any other documents necessary or appropriate to obtain codes and passwords
enabling the undersigned to make electronic filings with the SEC of reports
required by Section 16(a) of the Exchange Act or any rule or regulation of the
SEC;

(3)	prepare, execute, acknowledge, deliver and file Form 144s (including any
amendments or supplements thereto) with respect to the sale of securities of the
Company by the undersigned, with the SEC, any national securities exchanges and
the Company, as considered necessary or advisable under Rule 144 of the
Securities Act of 1933 and the rules and regulations promulgated thereunder, as
amended from time to time;

(4)    seek or obtain, as the undersigned's representative and on the
undersigned's behalf, information on transactions in the Company's securities
from any third party, including brokers, employee benefit plan administrators
and trustees, and the undersigned hereby authorizes any such person to release
any such information to the attorney-in-fact and approves and ratifies any such
release of information; and

(5)     perform any and all other acts which in the discretion of such
attorney-in-fact are necessary or desirable for and on behalf of the undersigned
in connection with the foregoing.

The undersigned acknowledges that:

(1)  this Limited Power of Attorney authorizes, but does not require, each such
attorney-in-fact to act in his discretion on information provided to such
attorney-in-fact without independent verification of such information;

(2)  any documents prepared and/or executed by each such attorney-in-fact on
behalf of the undersigned pursuant to this Limited Power of Attorney will be in
such form and will contain such information and disclosure as such
attorney-in-fact, in his discretion, deems necessary or desirable;

(3)  neither the company nor such attorney-in-fact assumes (i) any liability for
the undersigned's responsibility to comply with the requirement of the Exchange
Act, (ii) any liability of the undersigned for any failure to comply with such
requirements, or (iii) any obligation or liability of the undersigned for profit
disgorgement under Section 16(b) of the Exchange Act; and

(4)  this Power of Attorney does not relieve the undersigned from responsibility
for compliance with the undersigned's obligations under the Exchange Act,
including without limitation, the reporting requirements under Section 16 of the
Exchange Act.

The undersigned hereby gives and grants each of the foregoing attorneys-in-fact
full power and authority to do and perform all and every act and thing
whatsoever required, necessary or appropriate to be done in connection with the
undersigned and the undersigned also hereby ratifies all that each such
attorney-in-fact shall lawfully do or cause to be done by virtue of this Limited
Power of Attorney.

This Power of Attorney shall remain in full force and effect until revoked by
the undersigned in a signed writing delivered to each such attorney-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Limited Power of Attorney to
be executed as of this 14th day of February, 2018.

/s/ John A. DeFord
John A. DeFord