What changes were made since 2008 in terms of medicare, medicaid & hmo/ppo insurance reimbursements of dme, mobility, bath safety & orthopedic items?

This is a great. Question and ive tried to do some searching to give a concise answer but i cannot find a study that isolates this data. If you go to cms website and drill down to search the term dme http://www.Cms.Gov/site-search/search-results.Html?Q=dme you see how hard it is to give a quick answer, ( have you read an article in hfn or elsewhere that gives this data? If so please share.