This is a descriptive study with a qualitative approach that has as objective to identify the nursing diagnoses of diabetic patients using insulin, having as inquiry method the study of multiple cases. The data were obtained by the researcher by means of physical examination and the technique of interview directed in the instrument based on the Orem's Self-Care Theory. After data collection, the diagnostic indentification was proceeded from the nominated nursing diagnoses of NANDA Taxonomy II, using Risner's reasoning diagnostic process. The identified nursing diagnoses with a higher frequency than 50% were six: impaired skin integrity (100%), risk for infection (100%), behavior of health search (57,2%), disturbed sleep (57,2%), chronic pain (57,2%) and risk for peripheral neurovascular dysfunction (57,2%). The application of the nursing process based in Orem and the importance of the identified diagnostic for clients nursing care were evidenced.