Policy A Lexicon of Assessment and Outcome Measures for Telemental Health Jay H. Shore, MD, MPH, 1 Matt C. Mishkind, PhD, 2 Jordana Bernard, MBA, 3 Charles R. Doarn, MBA, 4 Iverson Bell, Jr., MD, 5 Rajiv Bhatla, MD, FRCPC, DABN, 6 Elizabeth Brooks, PhD, 1 Robert Caudill, MD, 7 Ellen R. Cohn, PhD, CCC-SLP, 8 Barthold J. Delphin, 9 Antonio Eppolito, MD, 10 John Fortney, PhD, 11 Karl Friedl, PhD, 12 Phil Hirsch, PhD, 13 Patricia J. Jordan, PhD, 14 Thomas J. Kim, MD, MPH, 15 David D. Luxton, PhD, 2 Michael D. Lynch, PhD, ABPP, 16 Marlene M. Maheu, PhD, 17 Francis L. McVeigh, OD, MS, 18 Eve-Lynn Nelson, PhD, 19 Chuck Officer, 20 Patrick T. O’Neil, MD, 21 Lisa J. Roberts, PhD, 22 Colleen Rye, PhD, 23 Carolyn Turvey, PhD, 24 and Alexander Vo, PhD 25 1 University of Colorado Anschutz Medical Campus, Aurora, Colorado. 2 Telehealth Program, National Center for Telehealth and Technology, Joint Base Lewis-McChord, Washington. 3 American Telemedicine Association, Washington, D.C. 4 Department of Family Medicine and Community Health, University of Cincinnati, Cincinnati, Ohio. 5 University of Tennessee Health Science Center, Memphis, Tennessee. 6 Department of Psychiatry, University of Ottawa, Ottawa, Ontario, Canada. 7 Department of Psychiatry, University of Louisville, Louisville, Kentucky. 8 School of Health and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania. 9 Defense Health Headquarters, Falls Church, Virginia. 10 U.S. Air Force Medical Support Agency, Arlington, Virginia. 11 Department of Psychiatry, University of Arkansas for Medical Sciences, Little Rock, Arkansas. 12 Physiology Associates, LLC, Frederick, Maryland. 13 Access Psychiatry Solutions, LLC, Seattle, Washington. 14 Pacific Telehealth & Technology Hui, Honolulu, Hawai’i. 15 Johns Hopkins Hospital, Baltimore, Maryland. 16 Kimbough Ambulatory Care Center/Northern Regional Medical Command, Arlington, Virginia. 17 TeleMental Health Institute, Inc., Cheyenne, Wyoming. 18 Telemedicine and Advanced Technology Research Center, Fort Detrick, Maryland. 19 Department of Pediatrics and Kansas Center for Telemedicine & Telehealth, University of Kansas Medical Center, Kansas City, Kansas. 20 UnitedHealth Group, Minnetonka, Minnesota. 21 Department of Psychiatry and Behavioral Sciences, Tulane University School of Medicine, New Orleans, Louisiana. 22 Bayer HealthCare, Bellevue, Washington. 23 Office of the Army Surgeon General, Arlington, Virginia. 24 University of Iowa, Iowa City, Iowa. 25 Colorado Access, Denver, Colorado. This is a product of the American Telemedicine Association Telemental Health Special Interest Group (SIG). Every author participated in the development and writing of this manuscript. Abstract Background: The purpose of this document is to provide initial recommendations to telemental health (TMH) professionals for the selection of assessment and outcome measures that best reflect the impacts of mental health treatments delivered via live interactive videoconferencing. Materials and Methods: The guidance provided here was created through an expert consensus process and is in the form of a lexicon focused on identified key TMH outcomes. Results: Each lexical item is elucidated by a definition, recommendations for assessment/measurement, and additional commentary on important considerations. The lexicon is not intended as a current literature review of the field, but rather as a resource to foster increased dia- logue, critical analysis, and the development of the science of TMH assessment and evaluation. The intent of this lexicon is to better 282 TELEMEDICINE and e-HEALTH MARCH 2014 DOI: 10.1089/tmj.2013.0357