This study examines the impact of Health Information Management (HIM) professionals on service delivery in the National Health Insurance Authority (NHIA), using Specialist Hospital Sokoto as a case study. Accurate and reliable health information is essential for effective healthcare service delivery, and HIM professionals play a vital role in ensuring data integrity, confidentiality, and accessibility. A descriptive cross-sectional design was used with a sample of 125 participants, of which 100 valid responses were analyzed. Data were collected through structured questionnaires and analyzed using frequency and percentage distribution. Findings revealed that 81% of respondents agreed that HIM professionals’ involvement improved NHIA service delivery, while 80% reported a positive impact on patient satisfaction. The study concludes that HIM professionals significantly enhance healthcare efficiency, accuracy, and patient outcomes under NHIA services. It recommends strengthening training, digital health infrastructure, and policy support to maximize their effectiveness.