Mr. Greg Foster

Mr. Greg Foster is a SAS programmer and applied statistician. He has experience with a wide array of health care data including primary data collection for clinical trials, epidemiological studies, quasi-experimental research, and quality improvement projects. He has conducted analysis using many of the nationally representative health survey data sets include MEPS, HCUP, and NHANES. He also has years of experience conducting quality improvement projects with Medicare claims data. He has co-authored several manuscripts for publication in peer-reviewed journals and has prepared reports for a wide range of audiences, including government agencies, stakeholders, and health care providers.


Mr. Foster has supported a number of contracts funded by the US Department of Health & Human Services, including the Centers for Medicare & Medicaid Services, the National Institutes of Health, and the Agency for Healthcare Research & Quality.

Prior Experience

Prior to joining IMPAQ, Mr. Foster was a research scientist and programmer at Social & Scientific Systems where he worked on alternative payment model projects and conducted data management and analysis of the Medical Expenditure Survey and the Healthcare Cost and Utilization Project. His work at Health Research and Educational Trust focused on understanding the impacts of hospitals joining health systems and he also contributed to several quality improvement initiatives. While at LeadingAge, he oversaw operational and scientific aspects of data coordinating center activities for quasi-experimental applied research studies. He was a scientist and analyst at Delmarva Foundation, where he was responsible for the scientific integrity of quality improvement projects focusing on the evaluation of Medicare data. Mr. Foster was also a research scientist and led the Data Management Group in the Department of Epidemiology and Statistics at MedStar Research Institute. In his time spent working as a biostatistician at the Center for Clinical Trials at Johns Hopkins University, Mr. Foster focused on clinical research design and analysis methodology.


Mr. Foster earned his MPH with a focus on epidemiology from Johns Hopkins University in Baltimore, Maryland. He also has an MA in experimental psychology from Towson University in Maryland. 

Previous Papers

Claxton, G., Rae, M., Long, M., Damico, A., Whitmore, H. & Foster, G.L. (2017). Health benefits in 2017: Stable coverage, workers face considerable variation in costs. Health Affairs, 36(10), 1838-1874.

Foster, G.L., Kenward, K., Hines, S. & Joshi, M.S. (2017). The relationship of engagement in improvement practices to outcome measures in large-scale quality improvement initiatives. American Journal of Medical Quality, 32(4), 361-368.

Claxton, G., Rae, M., Long, M., Damico, A., Whitmore, H. & Foster, G.L. (2016). Health benefits in 2016: Family premiums rose modestly, and offer rates remained stable. Health Affairs, 35(10), 908-1917.

Adler-Milstein, J., DesRoches, C.M., Kralovec, P., Foster, G.L., Worzala, C., Charles, D., Searcy, T., & Jha, A.K. (2015). Electronic Health Record Adoption in US Hospitals: Progress Continues, But Challenges Persist. Health Affairs, 34(12), 2174-2180.

Resnick, H.E. & Foster, G.L. (2013). Diabetes in residential care facilities: United States, 2010. Diabetes Care, 36(3), Online Letter.

Resnick, H.E., Hickman, S. & Foster, G.L. (2012). Documentation of Advance Directives Among Home Health and Hospice Patients: United States, 2007. American Journal of Hospice and Palliative Care, 29(1): 26-35.

Resnick, H.E., Hickman, S. & Foster, G.L. (2011). Advance Directives in Home Health and Hospice Agencies: United States, 2007. American Journal of Hospice and Palliative Medicine, 28(7), 67-474.

Resnick, H.E., Foster, G.L. & Hickman, S.E. (2009). Nursing home participation in end-of-life programs: United States, 2004, American Journal of Hospice and Palliative Medicine, 26(5), 354-360.

Walitt, B., Roebuck-Spencer, T., Bleiberg, J., Foster, G.L. & Weinstein, A.. (2008). Automated neuropsychiatric measurements of information processing in fibromyalgia. Rheumatology International, 28(6), 561-564.

Walitt, B., Roebuck-Spencer, T., Esposito, G., Atkins, F., Bleiberg, J., Foster. G.L. & Weinstein A. (2007). The effects of multidisciplinary therapy on positron emission tomography of the brain in fibromyalgia: a pilot study. Rheumatology International, 27(11), 1019-24.

Resnick, H.E., Foster, G.L., Bardsley, J. & Ratner, R. (2006). Achievement of diabetes clinical practice recommendations among U.S. adults with diabetes, 1999-2002 The National Health and Nutrition Examination Survey. Diabetes Care, 29(3), 531-537.

Martinez, F.J., Foster, G.L., Curtis, J.L., Criner, G., Weinmann, G., Fishman, A., DeCamp, M.M., Benditt, J., Scuirba, F., Make, B., Mohsenifar, Z., Diaz, P., Hoffman, E., Wise, R., for the NETT Research Group. (2006). Predictors of mortality in patients with emphysema and sever airflow obstruction. American Journal of Respiratory Critical Care Medicine, 173, 1326-1334.

Brown, D.M., Thorne, J.E., Foster, G.L, Duncan, J.L., Brune, L.M., MuNana, A., Meinert, C.L. & Jabs, D.A. (2006). Factors Affecting Attrition in a Longitudinal Study of Patients with AIDS. Journal of AIDS Care, 18(7), 821-829.

Newman, A.B., Foster, G.L., Givelber, R., Nieto, F.J., Redline, S.& Young, T. (2005). Progression and regression of sleep disordered breathing with changes in weight: The Sleep Heart Health Study. Archives of Internal Medicine, 165, 2408-2413.

Haas, D.C., Foster, G.L., Nieto, F.J., Redline, S., Resnick, H.E., Robbins, J.A., Young, T. & Pickering, T.G. (2005). Age-dependent associations between sleep disordered breathing and hypertension: The importance of discriminating between systolic/diastolic hypertension and isolated systolic hypertension in The Sleep Heart Health  Study. Circulation, 111, 614-621.

Resnick, H.E. & Foster, G.L. (2005). Prevalence of elevated ankle-brachial index in the United States 1999-2002: Results from the National Health and Nutrition Examination Survey. American Journal of Medicine, 118, 676-679.

Dunn, J.P., Van Natta, M., Foster, G.L., Kupperman, B.D., Martin, D.F., Zong, A. & Jabs, D.A. (2004). Complications of ganciclovir implant surgery in patients with cytomegalovirus retinitis: The Ganciclovir Cidofovir Cytomegalovirus Retinitis Trial. Retina, 24, 41-50.

O’Connor, G.T., Lind, B.K., Lee, E.T., Nieto, F.J., Redline, S., Samet, J.M., Boland, L.L., Walsleben, J.A. & Foster, G.L. (2003). Variation in symptoms of sleep-disordered breathing with race and ethnicity. Sleep, 26, 74-79.