Atty. James Phillip O'Brien

Atty. James Phillip O'Brien

James Phillip O'Brien is a lawyer practicing health care, health care mergers and acquisitions, health care regulatory and 3 other areas of law. James received a B.A. degree from Western Illinois University in 1971, and has been licensed for 52 years.

Chicago Chicago 52 yrs experience 52 year
Call (269) 492-7524 Book Appointment

Profile Summary

About James Phillip O'Brien at a glance

James Phillip O'Brien is a Partner based in Chicago, Illinois, practicing at Katten Muchin Rosenman LLP. They have 52+ years of legal experience, licensed to practice since 1974. Their practice focuses on irs, tax, m&a, and health care. Admitted to practice in Illinois (1974). Educated at University of Illinois College of Law (J.D., 1974) and Western Illinois University (B.A., 1971). Recognitions include AV Preeminent. Active member of National Health Lawyers Association. Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • James Phillip O'Brien is a lawyer practicing health care, health care mergers and acquisitions, health care regulatory and 3 other areas of law
  • James received a B.A. degree from Western Illinois University in 1971, and has been licensed for 52 years
  • James practices at Katten Muchin Rosenman LLP in Chicago, IL

Practice Areas Explained

James Phillip O'Brien's Areas of Practice

Each practice area below reflects the types of cases James Phillip O'Brien handles, with a brief overview of what that area of law covers.

IRS Disputes & Audits

James Phillip O'Brien is one of 2,917 irs attorneys indexed nationally. Browse irs attorneys in Illinois →

Tax Law

Tax attorneys handle IRS audits, tax debt, international tax, estate planning, and tax court litigation.

James Phillip O'Brien is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in Illinois →

Mergers & Acquisitions

James Phillip O'Brien is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in Illinois →

Health Care Law

Health care attorneys for HIPAA, Medicare, Medicaid, regulatory compliance, and medical licensing matters.

James Phillip O'Brien 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.

Frequently Asked

Common questions about James Phillip O'Brien

Where is James Phillip O'Brien's law office located?
James Phillip O'Brien's law practice is located in Chicago, Illinois. The firm is Katten Muchin Rosenman LLP. You can contact the office directly through this profile page.
What practice areas does James Phillip O'Brien handle?
James Phillip O'Brien focuses on irs, tax, m&a, health care. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has James Phillip O'Brien practiced law?
James Phillip O'Brien has 52+ years of legal experience and has been licensed since 1974.
Where did James Phillip O'Brien go to law school?
James Phillip O'Brien earned their education at (J.D., 1974); (B.A., 1971).
How can I contact James Phillip O'Brien for a consultation?
You can contact James Phillip O'Brien directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has James Phillip O'Brien received?
James Phillip O'Brien's notable recognition includes: AV Preeminent.

Education

J.D.
University of Illinois College of Law
- 1974
B.A.
Western Illinois University
- 1971

Awards

AV Preeminent

Bar Admissions

Illinois
Admitted: 1974

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