What Is A Medicare Subsection D Hospital? 
Hospitals that use a certified electronic health record are able to receive payment incentives outlined by the American Recovery and Reinvestment Act of 2009 -LRB- ARRA -RRB- . In essence , a Medicare Subsection D -LRB- d -RRB- hospital is a general , acute care , short-term hospital . The Social Security Act explains what a Medicare Subsection -LRB- d -RRB- Hospital is NOT : 1 -RRB- It is not a psychiatric hospital 2 -RRB- It is not a rehabilitation hospital 3 -RRB- The patients are not predominantly under 18 years of age 4 -RRB- The average length of stay is not more than 25 days 5 -RRB- It is not extensively involved in treatment or research for cancer Of course , there are a lot of exceptions and extrapolations , but this is it in a nutshell . 