This article aims to present a methodology for monitoring the procedures recommended in the care protocol for diabetic patients, based on the indicator of the ratio between supply and demand for exams, according to Brazil, macro-regions, federative units (FUs), and municipalities. The prevalence of diabetes mellitus (DM) and its complications were estimated using a multinomial model. The offer of DM procedures was obtained from the Ambulatory Information System (SIA/SUS) and the demand from the number of tests defined in the protocol as necessary per year, according to disease risk categories. Based on this, the supply-demand ratio indicator was created. The innovation here consists of analyzing the demand for diabetic care according to established parameters and the supply of health services together. The connection between the recommended treatment protocol and the existence of the service offered concerning the demand for care based on the prevalence of the disease provides a key monitoring tool. And, when analyzed together with the indicator of the ratio between supply and demand for procedures, these measures become a proxy for the quality of prevention and care for patients with the disease.