RESUMEN
BACKGROUND: The widely available informal healthcare providers (IHPs) present opportunities to improve access to appropriate essential health services in underserved urban areas in many low- and middle-income countries (LMICs). However, they are not formally linked to the formal health system. This study was conducted to explore the perspectives of key stakeholders about institutionalizing linkages between the formal health systems and IHPs, as a strategy for improving access to appropriate healthcare services in Nigeria. METHODS: Data was collected from key stakeholders in the formal and informal health systems, whose functions cover the major slums in Enugu and Onitsha cities in southeast Nigeria. Key informant interviews (n = 43) were conducted using semi-structured interview guides among representatives from the formal and informal health sectors. Interview transcripts were read severally, and using thematic content analysis, recurrent themes were identified and used for a narrative synthesis. RESULTS: Although the dominant view among respondents is that formalization of linkages between IHPs and the formal health system will likely create synergy and quality improvement in health service delivery, anxieties and defensive pessimism were equally expressed. On the one hand, formal sector respondents are pessimistic about limited skills, poor quality of care, questionable recognition, and the enormous challenges of managing a pluralistic health system. Conversely, the informal sector pessimists expressed uncertainty about the outcomes of a government-led supervision and the potential negative impact on their practice. Some of the proposed strategies for institutionalizing linkages between the two health sub-systems include: sensitizing relevant policymakers and gatekeepers to the necessity of pluralistic healthcare; mapping and documenting of informal providers and respective service their areas for registration and accreditation, among others. Perceived threats to institutionalizing these linkages include: weak supervision and monitoring of informal providers by the State Ministry of Health due to lack of funds for logistics; poor data reporting and late referrals from informal providers; lack of referral feedback from formal to informal providers, among others. CONCLUSIONS: Opportunities and constraints to institutionalize linkages between the formal health system and IHPs exist in Nigeria. However, there is a need to design an inclusive system that ensures tolerance, dignity, and mutual learning for all stakeholders in the country and in other LMICs.