Atty. John M. Callahan
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.
Profile Summary
About John M. Callahan at a glance
John M. Callahan is a health care attorney based in Chicago, Illinois, practicing at McDermott Will & Schulte. Educated at University of San Diego (J.D., 1994). Recognitions include Best Lawyers in America — Health Care Law (2026). Serands clients in Chicago, IL and the surrounding metropolitan area.
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About
- 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
- Read full biography: https://www.mwe.com/people/callahan-john-m/
Practice Areas Explained
John M. Callahan's Areas of Practice
Each practice area below reflects the types of cases John M. Callahan handles, with a brief overview of what that area of law covers.
Health care attorneys for HIPAA, Medicare, Medicaid, regulatory compliance, and medical licensing matters.
John M. Callahan is one of 66,735 health care attorneys indexed nationally. Browse health care attorneys in Illinois →
Jurisdictional Context
Why local counsel matters in Illinois
Practicing law in Illinois. Legal matters in Illinois are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Chicago are typically filed in the local municipal court or the appropriate Illinois state district court, depending on subject matter and amount in controversy. An attorney licensed in Illinois brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Illinois courts without local counsel or pro hac vice admission.
Looking for additional Illinois attorneys? Browse all attorneys in Chicago or all attorneys in Illinois.
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