Our objective was to evaluate differences in linear regression versus multilevel(cross-level interaction model)modeling for affecting factors lumbar discectomy. The data were used in 2011 patients with HIRA sample data. Total number of analysis is 3,641 patients and 248 hospitals. The results of research model showed that the type and location of the hospital-level factors were significant. However, all factors of patient-level were similar in the two models. Therefore, it requires the selection of anappropriate model for a more accurate analysis of the influencing factors in the daily medical charge.