PART IV
ITEM 15. Exhibits and Financial Statement Schedules

EXHIBIT 23   Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-179307, No. 333-166583, No. 333-163899, No. 333-147994, No. 333-64207, No. 333-129395, No. 333-107839, No. 333-90785, No. 333-218510, No. 333-31903, No. 333-22391, No. 033-60053 and No. 033-51791) and Form S-3 (No. 333-219729) of Cigna Corporation of our reports dated February 28, 2018 relating to the financial statements, financial statement schedules and the effectiveness of internal control over financial reporting, which appear in this Form 10-K.

/s/ PricewaterhouseCoopers LLP
Hartford, Connecticut
February 28, 2018

E-4    CIGNA CORPORATION - 2017 Form 10-K