The assessment of lean deployment in the health sector should be determined to evaluate the success and sustainability of the practice. The measurement shall be identified through the alignment of the Critical Success Factor (CSF) to the lean objective. This paper developed the preliminary framework for measuring lean healthcare sustainability through the CSF measure. 56 item measures were identified that linked to 11 basic CSF in assessing lean sustainability. In sequence, this paper established the importance of CSF measures through a quantitative method. The 30 participants whose has knowledge and experience in lean practice were identified in the local hospital in the southern region. The survey questionnaire was distributed to participants with 100 percent response rate. The data was analyzed by performing reliability and validity test to appraised the quality. The findings of this study are concluded by recommending all item measures as important for this measurement framework. The top CSF which are leadership and management, employee involvement, lean healthcare practice, efficient infrastructure and, education and training perspective has been considered as the main vital CSF for lean implementation that drive other CSFs for continuous and sustainable practice in the healthcare organization.