The purpose of this study was to translate the Clinical Care Classification System into Turkish and evaluate its applicability to the care of elderly nursing home residents. This study uses a quasi-experimental design in which interventions and evaluations are repeated at specified time intervals in a single group and in which the Clinical Care Classification System is evaluated in a descriptive manner through the use of documents obtained from the system to test the applicability of the system for the care of elderly nursing home residents. Twenty-eight elderly people participated in the study. The health conditions of elderly people were evaluated using an elderly assessment form based on data obtained after nursing diagnoses and nursing interventions were determined using the Clinical Care Classification System. The change in nursing diagnoses as a result of the applied nursing interventions was evaluated. A total of 297 diagnoses were specified in 18 care components directed to the elderly, and 310 interventions were performed. Upon evaluation of the consequences of the interventions, changes in 208 nursing diagnoses were observed. The findings indicate that the Clinical Care Classification System is useful for determining the requirements of the elderly, providing suitable nursing care and enabling the evaluation of the process.