A. Thomas McLellan

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A. Thomas McLellan
Deputy Director of the Office of National Drug Control Policy
In office
President Barack Obama
Succeeded by Michael Botticelli
Personal details
Born May 29, 1949
Staten Island, New York
Alma mater Colgate University (B.A.), Bryn Mawr College (M.S., Ph.D.)

A. Thomas McLellan (born May 29, 1949, in Staten Island, New York)[1] is a psychologist and professor of psychiatry at the University of Pennsylvania and founder and Executive Director of the Treatment Research Institute, a not-for-profit research and evaluation institute in Philadelphia.

McLellan received his B.A. from Colgate University and his M.S. and Ph.D. from Bryn Mawr College. He received postgraduate training in psychology at Oxford University. He has since worked for the Veterans Administration Medical Center in Philadelphia and the University of Pennsylvania.

McLellan was the principal developer of the Addiction Severity Index (ASI) and the Treatment Services Review (TSR), widely used substance abuse instruments. He has served as an adviser to many government and nonprofit scientific organizations, including the Office of National Drug Control Policy, the National Practice Laboratory of the American Psychiatric Association, the Swiss National Science Foundation, the World Health Organization, the Greek government and Public Health England.

McLellan served as the Deputy Director of the Office of National Drug Control Policy under the Obama administration.[2]

Among McLellan’s many honors and awards are the Life Achievement Award of the American Society of Addiction Medicine in 2003 and the 2002 award for Distinguished Contribution in Addiction Medicine from the Swedish Medical Association. He has served as Editor-in-Chief of the Journal of Substance Abuse Treatment.[3]


  1. ^ [1][dead link]
  2. ^ "Obama Administration Names A. Thomas McLellan Deputy ONDCP Director" (Press release). 2010-04-10. Retrieved 2010-08-09. 
  3. ^ Imhof, John E.; Hirsch, Robert (2001). "Editorial: The Torch is Passed". Journal of Substance Abuse Treatment 20 (1): 1–2. doi:10.1016/S0740-5472(00)00173-2. 

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