Background In resource-constrained settings, primary health centers (PHCs) are critical for universal health coverage. Laboratory service is one of its important components. While PHC and its performance are focused, its laboratory service has been neglected in developing countries. A routine checkup is a general physical evaluation and is not performed for a specific injury, illness or condition. A routine checkup in laboratory service is one of its important components are beneficial for detecting diseases in early stages when treatments are most effective. In the Kingdom of Saudi Arabia (KSA), free-of-charge healthcare services including the analysis to be carried out in laboratories are offered to citizens. However, studies are consistently finding that Saudi people are not taking advantage of the free routine checkups. Two survey studies one involving a nationally representative sample of Saudi adults and the other involving Saudi students studying in the Saudi or out of Saudi found that three-quarters of the participants had never had a routine checkup. A third study reported that 65.7% of Saudis had never had a routine checkup in laboratory.