Background <p>Undergraduate curriculum assessment is a systematic, evidence-based review of all curricular components. Our university assembled a multidisciplinary expert panel to develop medical-specific protocols and benchmarks now implemented across the three affiliated teaching hospitals, launching a university-wide, data-driven improvement cycle. This study will measure the impact of assessment on teaching effectiveness by comparing student achievement.</p> Methods <p>We conducted a mixed-design study across the three teaching hospitals of the School of Medicine. Longitudinally, we compared diagnostics grades at Branch Hospital 1 for the 2020, 2022 and 2023 cohorts—before, during and after the 2022 curriculum assessment. In a cross-sectional analysis, we compared Undergraduate Clinical Medicine Proficiency Test scores in internal medicine and obstetrics and gynecology among students who completed both courses in 2022 at the three affiliated teaching hospitals.</p> Results <p>Following the 2022 curricular review, diagnostics final-examination scores at Branch Hospital 1 appeared to trend upward relative to both pre- and post-review years, whereas total course grades remained stable. Internal medicine was reviewed only at Branch Hospital 1, where students tended to score somewhat higher than their peers at Branch Hospital 3 in theory, and the top 27% seemed to outperform counterparts at Branch Hospital 2. Obstetrics and gynecology, evaluated at Branch Hospitals 1 and 2, showed somewhat higher scores than at Branch Hospital 3. Student surveys generally reflected positively on the reviewed curriculum’s teaching quality.</p> Conclusions <p>Curriculum assessment appears to be associated with short-term gains in examination performance and may support ongoing improvements in theoretical mastery, particularly among high-achieving students. We will therefore continue to refine the undergraduate evaluation system to better serve the medical program.</p>