William P. Ziegelmueller joined Stetler & Duffy, Ltd. at its inception and became a shareholder in the firm as of January 1, 2001. Prior to joining the firm, Mr. Ziegelmueller practiced in the Trial Department of McDermott, Will & Emery.

Mr. Ziegelmueller’s practice is primarily concentrated in health care fraud and abuse and compliance matters. He has represented clients at many levels of the health care industry, including doctors, physician groups, hospitals, DME providers, drug manufacturers, insurance companies, and Medicare carriers. Mr. Ziegelmueller has defended clients facing criminal prosecution, as well as civil and administrative claims, including qui tam actions, related to alleged violations of the Anti-Kickback Statute, the Prescription Drug Marketing Act, Medicare and Medicaid regulations, and federal and state fraud laws. He also has conducted internal corporate investigations and counseled clients on the implementation of compliance programs and corporate integrity agreements. In addition to his health care practice, Mr. Ziegelmueller has litigated numerous commercial and employment disputes, including those involving breach of contract, fraud, and civil RICO violations, and has also defended clients charged with violations of securities laws and regulations. Mr. Ziegelmueller also has experience representing both civil and criminal litigants on appeal.

Mr. Ziegelmueller is a member of the bar of the State of Illinois and the general and trial bars of the U.S. District Court for the Northern District of Illinois. Mr. Ziegelmueller received his undergraduate degree magna cum laude, with honors, from Wake Forest University. He received his law degree in 1994 from Northwestern University, where he served as coordinating note editor of the Journal of Criminal Law and Criminology.