Matt’s Background in Public Health and Health Care:


  • MD from Tulane University School of Medicine,
  • MPH from School of Public Health and Tropical Medicine.
  • Internal medicine residency program at Northwestern University


  • As Assistant Medical Director for the HELP Network (Handgun Epidemic Lowering Plan):
    • Conducted policy research and helped organize 14 medical societies to resist the expiration of the 2004 assault weapons ban, organized national communications and conferences for gun injury and gun violence prevention, helped organize advocacy for the National Violent Death Reporting System and train health professionals to become gun injury prevention advocates.
  • As research and advocacy faculty in the departments of pediatrics and preventive medicine (at Northwestern) and as a lecturer in emergency medicine (University of Wisconsin):  
    • Instructed medical students in courses on physician leadership, physician advocacy, violence as a public health problem, community organizing for obesity prevention, and on community integrated health models.  
  • As Executive Director of the Consortium to Lower Obesity in Chicago Children (CLOCC):
    • Organized approximately 800 organizations into a coalition that conducted research, public education, trainings, and advocacy to make healthy choices easier for children and parents.    
    • Contributed to health equity and collective impact science.
    • Led the development of the City of Chicago’s Inter-Departmental Task Force on Child Obesity Prevention, which led to City ordinances on health standards in child care, and School Board resolutions to fund coordinated school health positions and activities.
    • Facilitated and led the 2004 IL Consensus Agenda for Childhood Obesity Prevention: in which over 100 organizations drafted and advocated for multiple pieces of State legislation to: (a) address food insecurity and make health food more accessible; (b) direct funding for transportation enhancements to make communities more walkable and bikeable; (c) establish the Childhood Health Examination Surveillance System (CHESS); (d) integrate childhood health objectives into the IL Early Learning Council.  
  • As a Fellow for the Altarum Institute, Matt directed a $3M Childhood Obesity Mission Project (CHOMP), which
    • Tested improvements in Patient Centered Education in WIC clinics in WA and AZ
    • Tested improvements in Immunization Information Systems (IIS) to collect data on children’s nutritional status in CA and MI
    • Assessed Quality Rating and Improvement Status upgrades in state-level child care systems to ensure parents are informed of center- and home-based health-promotion practices in used by providers in MI, DE, and DC.
    • Evaluated changes to the Child and Adult Care Food Program (CACFP) being implemented by Washington DC.
    • Partnered with the Partnership for a Healthier America (PHA) to evaluate corporate adherence to public commitments made to Mrs. Obama’s “Let’s Move” Initiative.
  • As the first-ever National Health Officer for the 2,700 YMCAs in the United States:
    • Supported the activities of 253 health coalitions, which implemented more than 39,000 community improvements and policy change efforts and impacted an estimated 73 million lives.
    • Developed, scaled, and disseminated a portfolio of chronic disease prevention programs on diabetes prevention, falls prevention, cancer survivorship, childhood weight management, arthritis management, high-blood pressure, and Parkinson’s disease.  
    • Directed an 8-state, 17-city, $12 million Health Care Innovation Award, funded by the Centers for Medicare and Medicaid Innovation under the Affordable Care Act.
      • The YMCA’s Diabetes Prevention Program created jobs, improved health outcomes and saved Medicare money. This was the first time in history that a community-based preventive service demonstrated these outcomes.   The YMCA’s DPP has been estimated to reduced new cases of diabetes by up to 71%, and to provide Medicare with a 5:1 return on its into this new preventive service.
      • In April of 2018, Medicare was expanded to cover the DPP nationwide, giving 23 million Medicare beneficiaries this new benefit.
      • For the work done in this project, Matt was identified by the Obama White House as one of the top innovators in health in the U.S.

Matt’s Publications

  1. Gun injury prevention comes of age.  Christoffel KK, Longjohn MM. J Trauma. 2002 Aug;53(2):213-8.
  2. Standardized outcomes measurements in emergency medical services for children research. Christoffel KK, Longjohn MM. Ambul Pediatr. 2002 Jul-Aug;2(4 Suppl):315-8.
  3. Chicago project uses ecological approach to obesity prevention. Longjohn MM. Pediatr Ann. 2004 Jan;33(1):55-7, 62-3.
  4. Are medical societies developing a standard for gun injury prevention? Longjohn MM, Christoffel KK. Inj Prev. 2004 Jun;10(3):169-73.
  5. Prevalence of overweight and risk of overweight among 3- to 5-year-old Chicago children, 2002-2003. Mason M, Meleedy-Rey P, Christoffel KK, Longjohn M, Garcia MP, Ashlaw C. J Sch Health. 2006 Mar;76(3):104-10.
  6. The 5-4-3-2-1 go! Intervention: social marketing strategies for nutrition. Evans WD, Necheles J, Longjohn M, Christoffel KK. J Nutr Educ Behav. 2007 Mar-Apr;39(2 Suppl):S55-9.
  7. Taking on childhood obesity in a big city: Consortium to Lower Obesity in Chicago Children (CLOCC)  Progress in Pediatric Cardiology, Volume 25, Issue 2, September 2008, Pages 199-206. Adam B. Becker, Matt Longjohn, Katherine Kaufer Christoffel
  8. Learning from state surveillance of childhood obesity. Longjohn M, Sheon AR, Card-Higginson P, Nader PR, Mason M. Health Affairs. 2010 Mar-Apr;29(3):463-72.
  9. Combating Childhood Obesity through a Neighborhood Coalition: Community Organizing for Obesity Prevention in Humboldt Park. Becker AB, Kaufer Christoffel K, Morales MA, Rodriguez JE, Longjohn MM. In, Urban Health: Combating Disparities with Local Data, Oxford University Press, 2010. Eds. Steven Whitman, Ami Shah, and Maureen Benjamins
  10. Translating research into evidence-based practice with potential for population-wide impact. Longjohn M, Vojta D. Am J Public Health. 2012 Aug;102(8):e5;
  11. Building Strategic Alliances to Promote Healthy Eating and Active Living. Risa Wilkerson, MA, Elizabeth A. Baker, PhD, MPH, and Matt M. Longjohn, MD, MPH. In Lifestyle Medicine, 2nd Edition, CRC Press, 2013. Ed. James Rippe.
  12. A coordinated national model for diabetes prevention: linking health systems to an evidence-based community program. Vojta D, Koehler TB, Longjohn M, Lever JA, Caputo NF. Am J Prev Med. 2013 Apr;44(4 Suppl 4):S301-6.
  13. The Y and Healthy Communities: Driven by Mission. Vinluan MH, Longjohn MM, Kennai KG. National Civic Review. 102(4): 72-74, 29 January 2014.
  14. CDC and YMCA: A Promising Partnership for Delivering Fall Prevention Programing. Ehrenreich H, Pike M, Hohman K, Kaniewski M, Longjohn M, Myers G, Lee R. Front Public Health. 2015 Apr 27;2:235.
  15. An Integrated Framework For The Prevention And Treatment Of Obesity And Its Related Chronic Diseases. Dietz WH, Solomon LS, Pronk N, Ziegenhorn SK, Standish M, Longjohn MM, Fukuzawa DD, Eneli IU, Loy L, Muth ND, Sanchez EJ, Bogard J, Bradley DW. Health Affairs 2015 Sep;34(9):1456-63.
  16. Weight management and physical activity throughout the cancer care continuum. Demark-Wahnefried W, Schmitz KH, Alfano CM, Bail JR, Goodwin PJ, Thomson CA, Bradley DW, Courneya KS, Befort CA, Denlinger CS, Ligibel JA, Dietz WH, Stolley MR, Irwin ML, Bamman MM, Apovian CM, Pinto BM, Wolin KY, Ballard RM, Dannenberg AJ, Eakin EG, Longjohn MM, Raffa SD, Adams-Campbell LL, Buzaglo JS, Nass SJ, Massetti GM, Balogh EP, Kraft ES, Parekh AK, Sanghavi DM, Morris GS, Basen-Engquist K. CA Cancer J Clin. 2018 Jan;68(1):64-89.
  17. Rationale and design of the Clinic and Community Approaches to Healthy Weight Randomized Trial. Fiechtner L, Perkins M, Biggs V, Langhans N, Sharifi M, O’Connor G, Price S, Locascio J, Kuhlthau K, Kwass JA, Nelson C, Land T, Longjohn M, Lawson V, Hohman K, Taveras EM. Contemp Clin Trials. 2018 Apr;67:16-22.

Selected References to Work Led by Matt

  1. Preventing Childhood Obesity: Health in the Balance. Institute of Medicine, Board on Health Promotion and Disease Prevention, Food and Nutrition Board, Committee on Prevention of Obesity in Children and Youth, National Academy Press, 2005. Eds. Koplan JP, Liverman CT, and Kraak V.
  3. Translating the Diabetes Prevention Program into the community. The DEPLOY Pilot Study.  Ackermann RT, Finch EA, Brizendine E, Zhou H, Marrero DG. Am J Prev Med. 2008 Oct;35(4):357-63
  4. Long-term effects of a community-based lifestyle intervention to prevent type 2 diabetes: the DEPLOY extension pilot study. Ackermann RT, Finch EA, Caffrey HM, Lipscomb ER, Hays LM, Saha C. Chronic Illn. 2011 Dec;7(4):279-90.
  6. Enrolling People With Prediabetes Ages 60–64 In A Proven Weight Loss Program Could Save Medicare $7 Billion Or More.Thorpe KE, and Yang Z. Health Affairs 30(9): 2011.
  7. Historic Cost-Savings from YMCA Diabetes Prevention Program Demonstration Project:
  8. Impact Of The YMCA Of The USA Diabetes Prevention Program On Medicare Spending And Utilization. Alva MA, Hoerger TJ, Jeyaraman R, et al. Health Affairs 36(3): 2017. .

  1. Effect of the LIVESTRONG at the YMCA exercise program on physical activity, fitness, quality of life, and fatigue in cancer survivors.
  2. Using National Networks to Tackle Chronic Disease. Hussein T, and Kerrissey M. Stanford Social Innovation Review, Winter 2013 Issue.