John Callahan advises clients on health sector mergers and acquisitions. Public companies, private equity firms, nonprofit health systems, academic institutions and governmental entities have trusted John to assist them in executing their most critical transactions. His unique focus on corporate and healthcare law drives an efficient and client-oriented approach to executing transactions. John is Head of International Health M&A for the Firm.

John has executed hundreds of transactions involving hospitals, behavioral health companies, physician practice management platforms, laboratories, pharmacies and providers of all types. He has structured unique joint ventures between taxable and tax-exempt entities, and transactions requiring complex structures to address changing regulatory and commercial landscapes.