Exhibit 23(a)

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Post-Effective Amendment to the Registration Statement on Form S-3 of our reports dated February 12, 2025 relating to the financial statements of Bristol-Myers Squibb Company and the effectiveness of Bristol-Myers Squibb Company's internal control over financial reporting, appearing in the Annual Report on Form 10-K of Bristol-Myers Squibb Company for the year ended December 31, 2024. We also consent to the reference to us under the heading "Experts" in such Registration Statement.

Morristown, New Jersey

October 30, 2025

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