To determine NANDA-I nursing diagnoses and NIC nursing interventions in patients who underwent radical prostatectomy.A cross-sectional and descriptive study was conducted in a research and teaching hospital in western Turkey between June 2016 and June 2017. The sample included adult patients diagnosed with prostate cancer in the immediate postoperative period of radical prostatectomy. Data collection was performed using Gordon's Functional Health Patterns, NANDA-International and Nursing Interventions Classification Taxonomy Systems.Participants were 54 adult patients. The main nursing diagnoses were in the classes of "physical injury", "self-care", "hydration" and "physical comfort". Some nursing diagnoses were identified in all patients, namely: "risk for deficient fluid volume", "risk for imbalanced fluid volume", "impaired urinary elimination". The most selected NIC interventions were in the classes of "risk management", "elimination management", "coping assistance", "tissue perfusion management" and "self-care facilitation".future studies with larger populations are needed to explore the nursing diagnoses and effects of nursing interventions on patients who underwent radical prostatectomy.