references to primary sources . please improve this by adding secondary or tertiary sources . october 2015 learn how and when to remove this template message health dialog type private industry disease management health founded 1997 headquarters boston massachusetts key people web golinkin ceo products care management and analytic services website www.healthdialog.com health dialog is a care management employee wellness and decision support provider and wholly owned subsidiary of rite aid corporation . the company is based in the united states and headquartered in boston massachusetts . the company was founded in 1997 to address overutilization . research done by john wennberg and the dartmouth institute for health policy and clinical practice found unwarranted variation which means that the amount of healthcare services consumed per capita varies significantly between different regions of the united states and that areas that deliver more care or higher cost care do not necessarily show improvements in health quality outcomes . 1 the company seeks to reduce unwarranted variation in the u.s. healthcare system through care management and shared decision making . contents 1 history 2 shared decision making 3 peer reviewed research 4 references 5 external links history edit in 1967 john wennberg began documenting geographic variation in healthcare . in 1988 he founded the center for evaluative clinical services cecs at dartmouth medical school . wennberg s work has shown that patients in regions of the united states that spend more and provide more healthcare services per capita often experience worse outcomes than lower spending areas that provide less care . through his research wennberg has argued that the medicare system could reduce spending by at least 30 % while improving the medical care of the most severely ill americans . for his contributions to the study of the healthcare system and health policy wennberg was named by health affairs as the most influential health policy researcher of the past 25 years . 2 founded in 1997 health dialog collaborates with the nonprofit informed medical decisions foundation to produce patient decision aids that seek to address unwarranted variation in healthcare and improve medical decisions by shared decision making . citation needed shared decision making edit shared decision making is a process with the aim of increasing patients understanding of their conditions and treatment options as well as their involvement in the choices that decide their care . 82 percent of adults over the age of 40 have made a decision about having surgery undergoing a screening test or tasking a new medication in the past two years . 54 percent of them have faced two or more of such of medical decisions . 3 roughly a third of medical decisions are about surgeries tests treatments and procedures that have two or more treatment options . 4 peer reviewed research edit in september 2010 a randomized controlled trial study led by wennberg entitled a randomized trial of a telephone care management strategy was published in the new england journal of medicine . the study followed 174 120 individuals over 12 months and compared the annual medical costs of those who received enhanced care management provided by health dialog to those who received standard care management services . the study found that the overall medical and pharmacy costs of those in the intervention enhanced group were 7.96 per member per month lower than the control group . the study reported that much of the savings were derived from a 10.1 % reduction in hospital admissions among the intervention group . 5 references edit history of tdi webpage the dartmouth institute for health policy & clinical practice health affairs names jack wennberg as the most influential health policy researcher of past quarter century press release christopher fleming health affairs 1 nov 2007 couper mick p. 4 february 2009 medical decisions in america the patient perspective pdf foundation annual research forum pdf summary of conference presentation washington d.c. united states informed medical decisions foundation dartmouth atlas project topic brief preference sensitive care center for the evaluative clinical sciences dartmouth medical school . june 2005 new england journal of medicine a randomized trial of a telephone care management strategy . sep 23 2010 external links edit center for evaluative clinical services cecs at dartmouth medical school informed medical decisions foundation retrieved from https en.wikipedia.org w index.php title health dialog & oldid 743301520 categories health information technology companiescompanies based in bostoncompanies established in 1997multinational companieshealth care companies of the united stateshidden categories articles lacking reliable references from october 2015all articles lacking reliable referencesall articles with unsourced statementsarticles with unsourced statements from 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