Abstract Intro: There is evidence to suggest that preventive services, such as breast cancer screening, were impacted during the SARS-CoV-2 pandemic with interruption in screening mammogram services during March-July 2020. Federally Qualified Health Centers (FQHCs) are a critical health system to help better understand pandemic sequelae among diverse patient populations so teams can better prepare for a future pandemic. US Preventive Services Task Force (USPSTF) recommends average-risk patients aged 50-74 screen for breast cancer biyearly. Based on USPSTF recommendations in 2021, 76% of non-Hispanic White women and 74 % of Latina women were up-to-date on mammography screening. Our study, RESTORE, focuses on understanding patient barriers and facilitators to completing breast cancer screening at one large urban FQHC during the pandemic. Here, we compare FQHC patient self-reported completion of breast cancer screening to documented breast cancer screening found in the electric health record (EHR). Methods: Patients (n=20) were interviewed between July 2023 and February 2024 about their healthcare utilization, breast cancer screening (including medical site), and health literacy throughout the COVID period (2018-2022). When a screening date was documented in the EHR, interviewers mentioned the screening date to participants during the interview. Interviews were audio recorded and transcribed. A preliminary review of these interviews was conducted to collect self-reported breast cancer screening date and compare it to the date in the EHR. Results: Interviewees’ average age was 65.1 years; 70 % were Spanish-speaking; 60% were Latino, and 95% were female. Of the Spanish-speakers, 8 out of 14 patients self-reported completing a mammogram between 2018-2022, with 2 of 8 reporting having completed it with an onsite vendor. Only 3 of these 8 mammograms were captured in the EHR. Of these three, 2 patients were prompted with the EHR date during the interview: one patient agreed with the date while the other rejected the date. Among the English-speaking patients, 4 out of 6 patients self-reported completing a mammogram between years 2018-2022, all of these 4 self-reported dates were captured in the EHR. Of these 4 patients, all were prompted with the EHR date, 3 agreed to the date and one rejected the date, with 3 of 4 reporting having completed it with an onsite vendor.Conclusion: Throughout COVID, FQHC patients sought mammogram screening; however, gaps in data systems limited completeness of the health system’s mammogram EHR data. Time delays between patient experience and interview dates, complicated our understanding of patients’ COVID experiences. The inconsistency between self-reported dates and EHR dates also creates challenges educating and convincing patients to stay up-to-date on screenings based on recommended intervals. Missing EHR data could have also impacted staff not accurately following-up for mammograms or referrals. Additional work is needed to understand the opportunities to better integrate FQHC EHR with mammogram vendor data systems. Citation Format: Anne Escaron, Crystal Gomez, Jennifer Schneider, Jennifer Rivelli, Fabian Hidalgo, Gloria Coronado. Examining breast cancer screening completion: Comparing patient self-report and electronic health record data at a Federally Qualified Health Center during the SARS-CoV-2 pandemic [abstract]. In: Proceedings of the 17th AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2024 Sep 21-24; Los Angeles, CA. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2024;33(9 Suppl):Abstract nr A130.