Photograph of William S.W. Chang

Government Experience

  • Department of Justice: Criminal Division—Trial Attorney, Fraud Section (2013-2018)


  • Stanford University, A.B. international relations (2001) departmental honors
  • Harvard Law School, J.D. (2005)


  • Admitted in New York and Texas Only
  • Practicing under the Supervision of D.C. Bar Members


  • Mandarin (Conversational)
William S.W. Chang, Partner Washington, D.C.
Phone: +1 202.624.2730
1001 Pennsylvania Avenue NW
Washington, DC 20004-2595

William S.W. Chang is a partner in Crowell & Moring’s Washington, D.C. office and a member of the firm’s Health Care and White Collar & Regulatory Enforcement groups. Will’s practice focuses primarily on health care fraud investigations and litigation. He offers fraud and abuse counseling; internal investigations; and trial and appellate representation of health care companies, executives, and medical professionals. 

Prior to joining Crowell & Moring, Will served as a trial attorney at the U.S. Department of Justice, Criminal Division, Fraud Section. He was a founding member of the Corporate Healthcare Fraud Strike Force, which investigates the largest and most sophisticated health care fraud cases nationwide. Will also served on the Houston Healthcare Fraud Strike Force. In those roles, he led multi-agency, criminal investigations of public and private companies and related individuals. Will led the successful prosecutions of nearly a dozen complex cases, and he tried five jury trials involving health care fraud, securities fraud, Anti-Kickback Statute violations, Bank Secrecy Act violations, and money laundering.

Will served as the Health Care Fraud Unit’s Computer Hacking and Intellectual Property counsel on cybercrime and the collection of electronic evidence. He also trained new prosecutors on investigating and prosecuting health care fraud.

For his government service, Will has received numerous awards from multiple agencies, including:

  • 2014 Assistant Attorney General’s Award for Distinguished Service; 
  • 2014 Commendation for Demonstrated Excellence from the FBI Director;
  • 2015 Assistant Attorney General’s Award for Distinguished Service; 
  • 2016 Exceptional Achievement Award from the U.S. Department of Health and Human Services–Office of the Inspector General;
  • 2016 Award for Excellence in Fighting Fraud, Waste, and Abuse from the U.S. Department of Health and Human Services–Office of the Inspector General; 
  • 2017 Commendation for Demonstrated Excellence from the FBI Director; and
  • 2018 Award for Excellence in Fighting Fraud, Waste, and Abuse from the U.S. Department of Health and Human Services–Office of the Inspector General.

Will previously clerked on the U.S. Court of Appeals for the Fifth Circuit for Judge Jennifer Walker Elrod and the U.S. District Court for the Eastern District of New York for Chief Judge Dora L. Irizarry.


Admitted to practice: Texas, New York, U.S. Supreme Court, U.S. Courts of Appeals for the Second, Fourth, Fifth, Sixth, Ninth, Eleventh, District of Columbia, and Federal Circuits, U.S. District Courts for the Eastern and Southern Districts of New York

Admitted in New York and Texas only. Practicing under the supervision of DC bar members.

Professional Activities and Memberships

  • Asian Pacific American Bar Association of DC

Speeches & Presentations

  • "Health Care Fraud 2018: Understanding Where the Government Is Heading," Crowell & Moring Webinar (April 17, 2018). Presenters: William S.W. Chang and Stephanie D. Willis.
  • "Healthcare Recovery – It’s Not Just for Healthcare Companies," Crowell & Moring's Fourth Annual In-House Recovery Conference, Dana Point, CA (March 8, 2018). Moderator: Kent A. Gardiner; Presenters: Christine M. Clements, Laura M. Kidd Cordova, and William S.W. Chang.
  • "Think Tank Session: Keeping Your Health System Safe From Fraud And Abuse Risk: Compliance Risks, Government Enforcement Priorities And Changes To Fraud And Abuse Laws And Regulations," Healthcare Law & Compliance Institute, Dallas, TX (March 4, 2018). Presenters: Troy A. Barsky and William S.W. Chang.
  • "United States v. Oriakhi, et al., Case Study: Largest Provider Attendant Services Fraud Case in Texas History," U.S. Department of Justice Annual National Healthcare Fraud Training Conference (2017). Co-Presenter: William S.W. Chang.
  • "Healthcare Investigative Tools: Subpoenas, Warrants, Data Analysis, Undercover Recordings, and Electronic Evidence," U.S. Department of Justice Healthcare Fraud Unit Training (2017). Co-Presenter: William S.W. Chang.
  • "Asserting Privilege in Federal Civil Litigation," Asian American Bar Association of New York and Kirkland & Ellis LLP (2009). Co-Presenter: William S.W. Chang.


  • "Arkansas Supreme Court Clarifies Standard for Awarding Punitive Damages," The Federalist Society, State Supreme Court Docket Watch (2012). Author: William S.W. Chang.
  • "U.S. Supreme Court Update," State Bar of Texas, 5th Annual Bill of Rights Course (2011). Co-Author: William S.W. Chang.

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Feb.22.2018 Accomplished Federal Health Care Prosecutor William S.W. Chang Joins Crowell & Moring