Background: PN improves BCA screening rates in underserved women, and decreases health care disparities. However, there is limited data regarding the ability of PN effect sustained change. We evaluated the long-term impact of PN for BCA screening at our institution, by assessing the rate at which women who underwent screening mammogram (SM) in 2017, with the aid of PN, completed subsequent (f/u) SM within guideline-concordant time frames. Methods: Patients (pts) consisted of women seen by our institution’s primary care providers, with referral for SM in the electronic medical record (EMR), but without scheduled appointment, who received PN between June 1 and September 30, 2017, and successfully completed SM in 2017. Pts were identified from the screening navigation database. EMR was reviewed to obtain demographic data, rate of f/u SM, and time from 2017 SM to prior and f/u SM. Wilcoxon signed-rank test was used for analysis. Results: 179 pts completed SM with the aid of PN in 2017. Median age was 58 (range 37-77), 52.5% were Hispanic, 26.8% Black; and 2.8% Asian. Preferred languages were English (70.4%) and Spanish (25.7%). 6 pts had never had prior SM; 30 had no prior SM at our institution. Median time between 2017 SM and prior SM was 29 months (mo) (range 12-104); only 20 pts (11.2%) had a prior SM within 24 mo. 177 pts were eligible for f/u SM in 2018 and 2019 (1 diagnosed with BCA on 2017 SM; 1 died in 2017). 85 pts (48%) completed f/u SM; 68 (39%) completed within 24 mo. Only 2 pts required PN to complete f/u SM. In pts with time to screening data available for both 2017 SM and f/u SM (n = 80), median time to SM improved from 24 to 16 mo (p < 0.01). Decreases were seen in Black (22 to 14 mo, p < 0.01), White (31 to 16 mo, p = 0.03), and Hispanic pts (28 to 18.5 mo, p < 0.01), and in English (22 to 15 mo, p < 0.01) and Spanish speakers (26 to 20 mo, p < 0.01). Conclusions: A single episode of PN for BCA screening had a sustained impact on pts at our institution, leading to improved compliance with future SM. Improvement was seen in pts of diverse races, ethnicities, and language preferences. Focused PN for pts who did not complete f/u SM is planned.