Abstract
BACKGROUND AND AIMS: For achieving an effective integrated primary health care, communication between healthcare providers is a key element. This study aimed to identify general practitioners' reported barriers to communication within referral systems and propose actionable strategies for improvement. METHODS: Guided by PRISMA 2020 guidelines, 22 qualitative studies from PubMed, Web of Science, Scopus, and ProQuest were analyzed using inductive thematic synthesis. Quality assessment followed Standards for Reporting Qualitative Research (SRQR) criteria. RESULTS: Four central themes emerged: structural barriers (subthemes: inefficient health system, shortages in the number of specialists and heavy workload), regulatory and procedural barriers (subthemes: lack of comprehensive communication protocols, unclear delineation of roles and responsibilities, inadequate economic incentives, lack of continuity between providers, lack of interest in specialists, time consuming communication process), technological barriers (subthemes: ineffective methods for communication, challenges in using electronic medical records), and personal and interpersonal barriers (subthemes: having different approaches to healthcare, inappropriate specialists' perceptions of general practitioners' roles, lack of professional trust and respect, social anxiety disorder in the workplace). CONCLUSION: Health policymakers must prioritize structural and procedural reforms, including standardized communication frameworks, interoperable digital infrastructure, and interprofessional training programs. Addressing these gaps can enhance referral system efficiency, reduce diagnostic delays, and strengthen health system resilience, particularly in low-resource settings. TRIAL REGISTRATION: The protocol of the review was registered in the International Prospective Register of Systematic Reviews (PROSPERO) on December 20, 2023 (Supporting Information S1).