n :  any of the payment categories in either of two systems containing approximately 500 and 700 such categories that are used to classify patients and esp. Medicare patients for the purpose of reimbursing hospitals for each case in a given category with a fixed fee regardless of the actual costs incurred and that are based esp. on the principal diagnosis, surgical procedure used, age of patient, and expected length of stay in the hospital - called also diagnosis related group  .
 
 
 
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