Objective: To carry out content validity of the statements of International Classification for Nursing Practice (ICNP®) terminology subset diagnoses, outcomes and nursing interventions for people with chronic kidney disease on conservative treatment. Methods: A methodological study, which followed the Brazilian method guidelines, with content validity conducted by the Delphi technique and carried out with 67 expert nurses. A total of 123 nursing diagnosis/outcome statements and 215 nursing intervention statements, distributed by Callista Roy’s adaptation model of nursing modes were assessed. To assess the degree of agreement regarding the meaning and clinical use among experts, the Content Validity Index (CVI) was used, accepting statements that presented an index ≥ 0.80. Results After two Delphi rounds, 117 diagnoses/outcomes and 199 nursing interventions were validated. Of the diagnoses, 70 (60%) were classified in Physiological Mode, 19 (16%) in Self-Concept Mode, 17 (14%) in Real-Life Function Mode, and 11 (10%) in Callista Roy’s Interdependence Mode. Among the most prevalent diagnostic statements were: “Altered Blood Pressure”, “Peripheral Oedema”, “Fluid Retention”, “Lack of Knowledge of Dietary Regime”, “Impaired Adaptation”, “Self-Care Deficit” and “Impaired Access to Treatment”. Valid nursing interventions underwent wording changes. Conclusion: The development of an ICNP® terminology subset according to the adopted theoretical model proved to be valid in terms of content for the care of people with chronic kidney disease undergoing conservative treatment through clear and directive care plans.