Review of Historical Case-Mix Indices and the Impact of Updating to the Version 8 DRG Grouper,
VECTOR RESEARCH INC ANN ARBOR MI
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This document presents a review of facility and Service branch Case- Mix Indices CMIs for the period FY 1985 through FY 1990 at Military Medical Treatment Facilities MTFs within the Military Health Services System MHSS. CMI values were computed based upon Version 4 and Version 8 Diagnosis Related Groups DRGs and respective case weights and Department of Defense DoD trim points. Changes in CMIs using Version 4 DRGs were examined for FY 1985 through FY 1990. In addition, the impact of updating the grouper from Version 4 to Version 8 was evaluated at the DRG, Service branch, and facility level. CMI Version 4 and Version 8 Comparison of DRG Grouper MTF MHSS.
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