Modern organizations increasingly rely on information technology (IT) to support their transactional processes and business strategies. The objective of this article is to evaluate the impacts of the implantation of IT governance in the segment of health plan operators (OPS) based in the state of Ceará as support for compliance with the norms of the National Health Agency (ANS), through a qualitative case study for descriptive and applied purposes. The theoretical framework was based on a review of the literature on important IT governance frameworks applied in the supplementary health market in Brazil and the regulation imposed by ANS regarding IT. Semi-structured interviews were conducted with the IT managers and IT user areas of these companies. The results were obtained from the triangulation of the interviews, direct observations and documentary analysis, whose evidences were treated by content analysis. The conclusions indicated that IT governance has a strong impact on quality and planning in meeting ANS standards, but the operators surveyed still do not explore all the available potential, with several levels of maturity and many opportunities for evolution.