Lawrence Segun AKANDE2024-05-222024-05-222022-12Kate TurabianM.Schttps://repository.lcu.edu.ng/handle/123456789/262National Health Insurance Scheme is recognised as viable means for achieving quality healthcare for all citizens at a cheaper rate. However, preliminary investigation has revealed that service delivery of National Health Insurance Scheme in Nigeria is perceived to be poor. These have adversely affected health service delivery which may lead to poor scheme coverage and rising dissatisfaction among enrolees. Hence, this study investigated the perception of service delivery by National Health Insurance Scheme enrolees in South West, Nigeria. Descriptive research design was adopted for this study. The population comprised of 77,321 enrolees of Federal, State and Corporate employees in Osun State. A sample size of 498 enrolees determined through Yamane sample size determinant served as the sample size of this study. Multi-stage random sample technique was used to select enrolees in selected towns.The reliability coefficient for the constructs of the study is: perception –0.85. Data collected was analysed using descriptive statistics. Findings revealed that service delivery of National Health Insurance Scheme lack quality, not always available, accessible and not generally affordable (3.14, 2.89, 2.91, and 2.94) respectively. Therefore, the study concluded that poor quality, availability, accessibility and affordability contributed to low level service delivery of National Health Insurance Scheme. In this regard, the study recommended that government should review policy on use of generic drugs, dedicated NHIS pharmacy shop, and make registration on the scheme compulsory for all private organisations. Keywords: National Health Insurance Scheme; Service delivery; Enrolees; South West; Quality Word Count: 231enThesis