October 1, 2007 Implementation of MS-DRGs

Medicare Severity DRGs (MS-DRGs) will be implemented for discharges occurring on or after October 1, 2007 as was announced in the inpatient prospective payment system (IPPS) final rule (CMS-1533-FC).

As stated in this rule, MS-DRGs represent a substantial improvement over the current CMS DRGs in their ability to differentiate cases based on severity of illness and resource consumption. As developed, the MS-DRGs increase the number of DRGs by 207, while maintaining a reasonable patient volume in each DRG.

Complete information on MS-DRGs is currently available as follows:

Documents on the Acute Inpatient Prospective Payment System Website

Final rule (CMS-1533-FC) - under IPPS Regulations and Notices

Downloadable files, including those listed below under Acute Inpatient - Files for Download

• Complications and Comorbidities (CC) - Table 6J - CC List
• Major Complications and Comorbidities (MCC) - Table 6I - MCC List
• CC Exclusions - Total CC Exclusion List
• Table 6G - Additions to the CC Exclusions List
• Table 6H - Deletions from the CC Exclusions List
• Crosswalk from CMS DRGs to MS-DRGs

Version 25.0 of the Grouper Logic

Version 25.0 of the Grouper manual is available from:

3M/HIS
100 Barnes Road
Wallingford, CT 06492
(203) 949-0303

Hard copy Grouper manual $250.00
CD version Grouper manual $200.00
Combination hard copy and CD versions $400.00

Version 25.0 of Grouper Software from NTIS