This thesis discusses about the evaluation of the suitability of the clinical pathway application of clinical pathway diarrhea in infants, with the aim of obtaining the results of an evaluation of the implementation of Clinical Pathway diarrhea in infants and the calculation of unit cost in cases of diarrhea in infants in Bhakti Rahayu General Hospital Denpasar. The research design used is the mix method, namely quantitative and qualitative research designs. The study was conducted in May 2019 to June 2020. The results obtained are still getting some variations in the services provided to patients so that the total cost of action in accordance with clinical pathway is Rp. 675,281, - with the real cost of services provided at Rp. 1,045,212 , - which means there is still a difference of Rp. 369,931, -.