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Arthur Y. Tsien

Phone: (202) 518-6318
Fax: (202) 234-3550

Arthur Tsien is a principal at OFW Law. He received his B.S. Magna Cum Laude in chemistry and physics in 1971 from Tufts University, and his J.D. from the University of Washington School of Law in 1978.

Arthur served as Law Clerk to Chief Judge Frank D. James, Washington Court of Appeals, from 1978 to 1980. He worked in the Office of Chief Counsel of the U.S. Food and Drug Administration from 1980 to 1985; at the time of his departure, he was Associate Chief Counsel for Veterinary Medicine and Enforcement.

Arthur joined the firm in 1986. He is the head of the firm's drug practice and co-head of the firm's litigation practice. His practice encompasses a broad range of regulatory and public policy issues. One focus of his practice is FDA regulatory and policy matters related to the balance between the rights of competing "brand" and generic drug companies. Arthur and the firm have represented clients in Federal court cases involving FDA generic drug approval and exclusivity issues for over 20 different drug products. His practice also focuses on health industry regulatory and policy matters, including Medicare and Medicaid payment matters, health care reform, medical privacy, and anti-kickback issues. Arthur is an integral part of the firm’s Health Industry Policy and Regulatory Practice. Another focus area of his practice concerns animal feeds and animal drugs.

Bar and Court Admissions

  • Washington, 1978 (inactive status)
  • District of Columbia, 1987
  • U.S. Supreme Court
  • U.S. Court of Appeals for the District of Columbia Circuit
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. District Court for the District of Columbia


  • University of Washington School of Law, Seattle, Washington, Juris Doctor, 1978
  • Tufts University, Medford, Massachusetts, Bachelor of Science, 1971
    Magna Cum Laude, Phi Beta Kappa

Special Agencies

  • Food and Drug Administration
  • Department of Justice

Honors and Awards

  • Washington, D.C. Super Lawyers, FDA Law, 2011-2019
  • Best Lawyers in America, FDA Law, 2014

Browse Arthur Tsien's posts on the Ag/FDA Blog