BACKGROUND: The intensive care unit (ICU) is crucial in treating severely ill patients, particularly those requiring mechanical ventilation. Nurses are essential for coordinating care and addressing any gaps within the ICU team. This study aimed to evaluate the care coordination competency of nurses in Iranian ICUs, specifically about mechanically ventilated patients. METHODS: A descriptive cross-sectional study was conducted at Guilan University of Medical Science from September to December 2022, involving 211 ICU nurses selected through convenience sampling. The Nurses' Coordination Competency Scale (NCCCS) and a demographic information form were used. Statistical analyses were conducted using SPSS version 16, including Pearson correlation, independent t-tests, one-way ANOVA, and multiple linear regression analysis, with a significance level set at 0.05. RESULTS: The mean score on the NCCCS for nurses was 3.41 out of 5. The multivariable analysis identified key factors influencing coordination competency, including a Master of Science in Nursing (MSN) degree (b = 0.891, P <
0.001), prior ICU experience (b = 0.080, P <
0.001), and fixed shift employment (b = 0.500, P = 0.011) scored higher on the NCCCS. Conversely, those in commitment-type positions had lower scores than those in standard roles (b=-0.690, P <
0.001). CONCLUSION: The study found that Iranian ICU nurses demonstrated high competency in coordinating care for mechanically ventilated patients. However, they must improve teamwork, align their understanding of patient care needs, and enhance team cohesion through training and advanced technologies.