Michael Parrish joined the UCSD Department of History in 1968 and served as department chairman during the early 1990s. He received his BA degree from the University of California, Riverside in 1964 and his Ph.D. from Yale University in 1968. He teaches courses on the history of American law and American politics and culture since the Civil War.
Parrish has been involved in 17 court cases related to tobacco issues spread over more than a decade. In 1998, Parrish declared during a deposition in Henley v. Philip Morris that he charged $125 an hour for his litigation-driven research on tobacco. In 2004 that rate had gone up to $225 an hour. The affidavit Parrish submitted in Izzarelli v. R.J. Reynolds in 2009 stated that his hourly rate for research was $175, for a deposition $300, and for testimony $400.
 See deposition of Michael Parrish, December 29, 1998, Henley v. Philip Morris. Westlaw reference: 1998 WL 35262559.
 See affidavit of Michael Parrish, October 1, 2004, Logan v. Brown and Williamson. Westlaw reference: 2004 WL 5660651.
 See affidavit of Michael Parrish, December 29, 2014, Izzarelli v. R.J. Reynolds. Westlaw reference: 2009 WL 2995399.