Abstract: Various technologies related to achieving financial neutrality in light of transition from one medical classification system to another are described. Mappings between and among codes such as diagnosis codes, procedure codes, and payment codes can be explored and chosen based on comparison of financial impact among candidate codes. To increase performance, weighting in favor of principal codes can be supported. Such weighting can be throttled for adjustment. Other features, including generating replacement codes based on chosen mappings, can be implemented.