D.C. Mun. Regs. tit. 29, § 4806
4806.1 The service intensity weights shall be based upon the discharge data base supplied by 3M with the version 26 APDRG grouper and centered for participating District of Columbia hospitals.
4806.2 The average charge per discharge shall be determined by identifying the average charge for cases within each discharge category, excluding outliers.
4806.3 The service intensity weight for each claim shall be equal to the ratio of the average charge per discharge for each APDRG to the aggregate average charge per discharge.
4806.4 The amount calculated in subsection 4806.3 shall be adjusted by a common factor to achieve a District wide case mix of one point zero (1.0) for the base year.
4806.5 The service intensity weights shall be modified periodically as the 3M APDRG weights are updated and new grouper versions are adopted.
SOURCE: Final Rulemaking published at 45 DCR 4141, 4147 (June 26, 1998); as amended by Final Rulemaking published at 46 DCR 8271, 8273 (October 15, 1999); as amended by Notice of Emergency and Proposed Rulemaking published at 57 DCR 2691 (March 26, 2010) [EXPIRED]; as amended by Notice of Emergency and Proposed Rulemaking published at 57 DCR 6837 (July 10, 2010) [EXPIRED]; as amended by Notice of Final Rulemaking published at 58 DCR 4323, 4328 (May 20, 2011); as amended by Final Rulemaking published at 59 DCR 15078 (December 28, 2012).