Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of Biogen, Inc. of our report dated February 13, 2024 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in Biogen Inc.’s Annual Report on Form 10-K for the year ended December 31, 2023.
/s/ PricewaterhouseCoopers LLP
Boston, Massachusetts
June 20, 2024
