<h3>Objectives</h3> This study evaluated the frequency and profile of requests for consultation for dental care in an onco-hematology service of a school hospital. <h3>Study Design</h3> This cross-sectional study evaluated requests for dental consultation in a hospital from 2017 to 2019. The data were tabulated and included information on sex and age of the patient, primary disease, reason for request, and dental treatment performed. <h3>Results</h3> The total number of consultations requested during this period by the onco-hematology service was 138, the mean age of the patients was 37.3 years, and the majority of patients were female (63.6%). Regarding primary disease, 45.6% of patients were diagnosed with some type of leukemia, 21.7% were diagnosed with multiple myeloma, and 21% were diagnosed with lymphoma. Of the reasons for dental consultation, 21% were evaluations prior to stem cell transplantation and 21% because of oral discomfort. The main treatments performed included oral hygiene guidance (43.2%), laser therapy for oral mucositis (28.4%), and tooth extractions (9.3%). <h3>Conclusions</h3> The most frequent dental procedures were oral care prior to cancer treatment, to avoid complications during hospitalization, and preventive and therapeutic photobiomodulation for oral mucositis.