Objectives:To describe the nursing care plan from the North American Nursing Diagnosis Association (NANDA) diagnoses, prescribed to gastric adenocarcinoma patients in the first nursing consultation carried out at the ambulatory of the Brazilian National Cancer Institute and to characterize the sociodemographic and clinical profile of these patients. Methods: Observational, descriptive and prospective study based on medical records during the first nursing consultation to gastric adenocarcinoma patients assisted at the Multidisciplinary Ambulatory Group for Research and Treatment of Gastric Cancer. For descriptive statistical analysis, we used the Microsoft Office Excel®, version 2016. The study was approved by institutional review board of the Brazilian National Cancer Institute. Informed consent was obtained from all participants. Results: Fifty patients were included in the study, predominantly men, with mean age of 62,42 years (SD = ±12,02), married, with low schooling and low income, smokers, eventual users of alcohol (n = 37), in advanced tumor stage (n = 90) and with initial symptoms characteristics of this phase. Twelve nursing diagnoses were common to all patients and the most frequently prescribed care were related to the feeding problems control, pain and lack of institutional routines knowledge. Conclusion: The taxonomy used allowed the nurse to identify problems and prescribe care according to its professional competence, using a standard language pattern to register in the medical records, allowing clear communication among the members of health team, based on the signals and symptoms presented by the patients. In this taxonomy, nursing diagnosis related to episodes of active bleeding was not found.