CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated March 7, 2019, relating to the consolidated financial statements of Ra Pharmaceuticals, Inc. appearing in the Annual Report on Form 10-K of Ra Pharmaceuticals, Inc. for the year ended December 31, 2018, and to the reference to us under the heading “Experts” in the Prospectus, which is part of this Registration Statement.
/s/ Deloitte & Touche LLP
Boston, Massachusetts
May 9, 2019