POWER OF ATTORNEY

HEALTHCARE TRUST OF AMERICA, INC.

The undersigned hereby constitutes and appoints Robert A. Milligan, in his capacity as the
Chief Financial Officer of Healthcare Trust of America, Inc. (the "Company") and with full power of
substitution, the undersigned's true and lawful attorney-in-fact to:

(1) prepare, execute in the undersigned's name and on the undersigned's behalf, and
submit to the U.S. Securities and Exchange Commission (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 Securities Exchange Act of 1934, as
amended (the "Exchange Act"), or any rule or regulation of the SEC;

(2) execute for and on behalf of the undersigned, in the undersigned's capacity as an
officer and/or director of the Company, Forms 3, 4, and 5 in accordance with
Section 16(a) of the Exchange Act and the rules thereunder;

(3) do and perform any and all acts for and on behalf of the undersigned which may be
necessary or desirable to complete and execute any such Form 3, 4, or 5, complete
and execute any amendment or amendments thereto, and timely file such forms with
the SEC and any stock exchange or similar authority; and

(4) take any other action of any type whatsoever in connection with the foregoing which, in
the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or
legally required by, the undersigned, it being understood that the documents executed
by such attorney-in-fact on behalf of the undersigned pursuant to this Power of
Attorney shall be in such form and shall contain such terms and conditions as such
attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to such attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the
exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute,
shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers
herein granted. The undersigned acknowledges that the foregoing attorney-in-fact, in serving in such
capacity at the request of the undersigned, is not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Exchange Act.

This 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 respect to the undersigned's holdings of and transactions in
securities issued by the Company, unless earlier revoked by (a) the undersigned in a signed writing
delivered to the foregoing attorney-in-fact, or (b) the attorney-in-fact in a signed writing delivered to
the undersigned.

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

/s/ Vicki U. Booth
Signature
Vicki U. Booth