Exhibit

We hereby consent to the incorporation by reference in the Registration Statement on Form S-3 (No. 333-206799) and Registration Statements on Forms S-8 (Nos. 333-205254, 333-110432, 333-128339, 333-152456, 333-140817 and 333-170133) of Biogen Inc. of our reportdated February 3, 2016 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10‑K.