Background In the realm of healthcare quality, outpatient parenteral antimicrobial therapy (OPAT) has emerged as the gold standard for managing patients who have transitioned from inpatient care but still require extended intravenous antimicrobial treatment. The adoption of OPAT at Al Hada Armed Forces Hospital in Taif, Saudi Arabia, not only bolsters patient satisfaction but also serves as a catalyst for reduced hospitalization durations, lower rates of emergency department readmissions, and an overall reduction in healthcare expenditures. The main objective of this study was to evaluate the effectiveness of OPAT in a tertiary center facility in Saudi Arabia. Methods In this retrospective investigation, we conducted a thorough review of patient records spanning from November 2020 to October 2021. Our study encompassed all patients who had intravenous antibiotics and were participants in the hospital’s OPAT program during this specific timeframe. Our primary goal was to achieve a 20% reduction in the total number of hospital bed days related to long-term antibiotic therapy. Results The incorporation of OPAT has yielded a multifaceted transformation within the hospital. Over the span of one year, from November 2020 to October 2021, there was a notable decrease in the proportion of patients requiring intravenous antibiotics. This percentage initially dropped from 23% to 12% with the implementation of the OPAT quality improvement project, and later, it reached an even lower 8%. This positive transformation not only had a positive impact on patient care but also led to significant cost savings, exceeding 2 million riyals. These savings were primarily driven by the reduction in hospitalization duration and the more efficient allocation of resources. Moreover, this improvement contributed to the avoidance of 673 patient days of hospitalization, thereby creating additional resources for more critical cases. Conclusion OPAT has emerged as a pivotal component of Al Hada Armed Forces Hospital’s commitment to elevating healthcare quality. This abstract offers a concise insight into the quality-driven impact of OPAT within a specific healthcare context, underlining its capacity to optimize patient care, enhance healthcare efficiency, and elevate resource allocation. Ongoing research and continuous evaluation will play a critical role in refining and expanding the OPAT program while preserving its quality-oriented perspective.