Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

(1) Registration Statement on Form S-3 No. 333-215935 of Cardinal Health, Inc.,

(2) Registration Statements on Form S-4 No. 333-62938 and No. 333-74761 of Cardinal Health, Inc., and

(3) Registration Statements on Form S-8 No. 33-42357, No. 33-64337, No. 333-72727, No. 333-90423, No. 333-91849, No. 333-38192, No. 333-38198, No. 333-56010, No. 333-129725, No. 333-149107, No. 333-155156, No. 333-163128, No. 333-164736, No. 333-177728, No. 333-183471, No. 333-206339, No. 333-206340, and No. 333-214412 of Cardinal Health, Inc.;

of our reports dated August 10, 2017, with respect to the consolidated financial statements and schedule of Cardinal Health, Inc. and subsidiaries and the effectiveness of internal control over financial reporting of Cardinal Health, Inc. and subsidiaries, included in this Annual Report (Form 10-K) of Cardinal Health, Inc. and subsidiaries for the year ended June 30, 2017.

/s/ Ernst & Young LLP

Columbus, Ohio

August 10, 2017